2016年8月27日星期六

Fully Welded Ball Valves Price and design

Short Description

China fully welded ball valve price, Advanced Design For Safety and Reliability; Pipeline Transportation, Meeting API 6D


Fully Welded Ball Valves Specification
• DDB or DIB Function for option
• Welding Slop with 100% X-Ray Examination
• Full Port, API 6D, API 607 Firesafe
• Injection Port for seat & stem, Drain and Vent Ports
• Stem extension for underground installation on request
• Self relieving seat
• Fire safe design,Anti-static device,Blow-out proof stem 
Fully Welded Ball Valve Design
The fully welded body design shall carry out the the finit element stress analysis.China fully welded ball valve finit element stress analysis
Fully Welded Ball Valves Seat Design 
The seat can be designed to DBB, DIB-1, DIB-2 to better satisfy the working condition.
China fully welded ball valve seat design drawing

Fully Welded Ball Valves Ball Design
When the ball is subject to medium force, the ball passed the force to the trunnion plate(rather than the stem), thus ensure the safety and easy operation for the stem. 
China fully welded ball valves ball design drawing
Fully Welded Ball Valves Drawing 
fully welded ball valves stem seal drawing from China fully welded ball valve manufacturer, supplier
Fully Welded Ball Valves Main Parts
Part No.Part NamePart No.Part Name
1Body15Seal Gland
2Anti-fire Packing16Thrust Bearing
3Seat17Stem
4Seat Ring18Flat Key
5O-ring19Thrust Bearing
6Spring20Anti-fire Gasket
7Bonnet21Connection Plate
8Sealant Injection Valve22Socket Head Screw
9Check Valve23Packing
10Ball24Packing Gland
11Thrust Gasket25Anti-static Device
12Sliding Bearing26Air Release Valve
13Pin27Drain Valve
14Bearing Holder


Corrosion Resistance and Sulfide Stress Resistance
Certain corrosion allowance is left for the body wall thickness. The carbon steel stem, fixed shaft, ball, seat and seat ring are subject to chemical nickel plating according to ASME B733 and B656. The valve material are to meet Nace MR 0175/ISO 15156 or Nace MR 0103 according to customer request, fully meet the reuqirements in standards and meet the service conditions in sulfurization evioronment. 
Non Destructive Examination
The forging materials are subject to ultrasonic examination according to ASME non destructive flaw detection requirements. The welding slope in connection connection face is subject to liquid penertration examination, or X-ray examinatiion.
Overview of Fully Welded Ball Valves
Fully welded ball valve are used mainly in Gas Transmission and Distribution pipeline (Mid-stream), typical for underground and buried installation. Fully welded ball valves normally adopt forged steel body; however, cast steel body is also available. There are normally extended stem for fully welded ball valves used for underground. The main advantage of fully welded Ball Valves is that there is no leaking path through the joints. 

2016年8月25日星期四

What are the main types of ball valves that do?

Ball valves are mainly used to cut off or connected media can also be used for fluid regulation and control, V-type ball valve can be more precise flow regulation and control, while the three-way ball valve is used for the distribution media and change the flow of media. What are the main types of ball valves that do? The following is a brief introduction of several commonly used:
First, the ball valve form of the structure can be divided into:
1)Floating ball valve.
The ball valve is floating under the media pressure, the ball can produce a certain displacement and pressed on the sealing surface of the outlet end, ensure the outlet end seal.
Floating ball valve simple structure, good sealing, but the ball all bear the load of the working medium to pass the exit ring, so to consider the ring material can withstand the work load media sphere. This structure is widely used in the low-pressure valve.
2)Fixed ball valve or trunnion mounted ball valve.
The ball valve is fixed, no pressure produces no movement. Fixed ball valve comes with a floating valve seat, by medium pressure, the valve seat to move, so that seals pressed onto the ball, in order to ensure the seal. Usually with the ball, the lower shaft with bearings, operating torque, suitable for high pressure and large diameter valves.
To reduce the trunniuon ball valve torque value and can increase the degree of sealing, ball valve seals has emerged in recent years, both the pressure injection of a special lubricant between the sealing surface to form a layer of film that enhances the seal, and reduces operator torque, more suitable for large-diameter high-pressure valve.
3)Elastic ball valve.
The ball valve is elastic. Ball and valve seat rings are metal materials, sealing pressure than the large, rely on the media itself has reached less than the pressure seal of requirements to be imposed force. This ball valve is suitable for high temperature and high pressure medium.
Elastic sphere is the sphere in the lower end of the inner wall to open a resilient groove, and get flexible. When closing the channel, with the stem of the wedge-shaped head with the ball to open up the seat pressing to seal. Before turning the ball first release wedge-shaped head, the ball along with restoration of the original prototype, so that small gap, sealing surface can reduce friction and operating torque between the ball and valve seat.
Second, the ball valve according to the driving mode can be divided into:
1)The electric ball valve: With electric drive ball valve.
2)Pneumatic ball valve: With compressed air ball valves.
3)Hydraulic ball valve: With oil fluid pressure actuated ball valve.
In addition there are more than a combination of several driving modes, such as gas - electric ball valves.
4)Manual ball valve: With the manual ball valve hand wheels, handles to manipulate the ball valve action. When the ball valve opening and closing torque is large, it can be set between the hand wheel worm reducer and stem. If necessary, you can also use the direction of the joint and the drive shaft for remote operation.
Third, the ball valve can be divided according to the connection method:
1) Threaded ball valve: Ball valve with internal or external thread and pipe thread connections.
2) Flanged ball valve: Ball valve with flange and pipe flange.
3)Solder connection Ball Valve: Ball valve with welding and pipe welding groove connection.
4)Wafer ball valves: bolt directly to the ball and clipped together through two pipelines form of connection.
Fourth, the ball valve can be divided according to body material:
1)The metal material ball valve: other parts of its body is made of a metallic material. Such as cast iron ball valve, carbon steel ball valve, steel ball valve, copper alloy ball valve, aluminum ball valve, titanium ball ball, Monel ball valve.
2)Non-metallic materials ball valve: their body and other parts are made of non-metallic materials. Such as plastic ball valve.
3)Metal body lined Ball valve: body shape for the main surface of the metal, interior where contact with the media are lining, such as rubber lined ball valve, lined ball valve.
Fifth, the ball valve can be divided according to their channel position:
Straight ball valve, ball valve (L-type ball valve, T-type ball valve and Y-type three-way ball valve), the four-way ball valve and right angle ball valve. After three valve for dispensing the media and change the flow of media.
Sixth, the ball valve can be divided according to their channel types: full bore ball valve, constriction ball valve, double necking ball valve.
Seven, ball valve can be divided according to the other: a monolithic ball valve, 2-pc ball valve, 3-pc ball valve, side-mounted ball valve, top entry ball valve.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月23日星期二

Cone strainers and strainer backwash model description

SR series strainers are petrochemical pump strainers, Y-type strainer, basket strainer, the model designation T-type strainer in front of the technology that I have described in detail in the article, the following main details Cone type strainer and backwash strainer model tag method:
First, the cone strainer and backwash strainer marking method.
Second, the cone strainer and backwash strainer structure type code.
SRZ I, steeple cone strainer.
SRF I, Horizontal backwash strainer.
SRZ II, flattened cone strainer.
SRF II, diversion backwash strainer.
Third, the cone strainer and backwash strainer end face type interfaces.
Threaded, welded connections, flanged, socket weld.
Fourth, the cone strainer and backwash strainer housing material designator.
C = carbon steel or cast steel
S = austenitic stainless steel
M = Low Alloy Steel
I = chrome molybdenum steel
H = Cr13 stainless steel
Q = ductile
K = malleable iron
R = Cr-Ni-Mo stainless steel
L = aluminum
T = copper and copper alloy
P = chrome-nickel stainless steel
V = chromium molybdenum vanadium steel
Note: The specific selection of materials should be specified in the technical data sheet strainers.
Five, cone strainer and backwash strainer flange sealing surface type code.
Projecting surface (smooth surface) = RF, concave = LF, convex = LM, ring groove surface = RTJ, the whole plane = FF, tongue and groove = TG
Six,Cone strainer and backwash strainer type illustrated.
Nominal diameter 50mm (2 "), nominal pressure 2.0MPa (150LB), connection type for the smooth face flange connection, the shell material is carbon steel are baffled T-type strainer, which is marked as: SRT I 4-2.0 -50 / C (RF).
Should you want to know more about strainer from Reliable Chinese valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

The installation, maintenance and replacement for the Y-type strainer

Y type strainer during use inevitably encounter some problems, then how to facilitate the installation of the straineruse, repair and replacement of the strainerover it? Under normal circumstances Y-strainer Mounting Horizontal methods are based, but because the pipeline is under the influence of design or construction environment, sometimes Y-type strainermounting position it is unable to mobilize, so this time we generate a force doubts then whether Y-type strainer can be mounted vertically it?
Y type strainer is to rely on the flow of the pressure medium is the medium strainerimpurities trapped in the strainerto the strainerin order to achieve the medium coarse strainerproblem, since it is the role of the media pressure, then the Y-strainer there is no need to install in a horizontal or vertical issues, and only have a pressure differential, then after the time when the media naturally Y-type strainer out the media, it completed the task, as long as the installation is not too high, suitable for everyday maintenance cleaning straineryou can, but really it so?
Usually when you install the Y-strainer horizontal installation while Y-side down, so in order to strainermedia can be deposited under the action of gravity, in the maintenance of clean the strainerwhen you can clear impurities. When we mounted vertically, strainerimpurities can be deposited by gravity, can reciprocate in the pipeline, it will inevitably hamper the work of the strainermedia.
Special attention is needed: some users installed vertically using a Y-type strainer, Y-type end up, if at pressures not yet fully emptied, and clean the straineris likely to cause injury accident.
Y-type strainer mounting normal use can only be mounted horizontally, not vertically installed can use, where the beginning of the design should take this into consideration, but also pay attention to the mounting height of the problem and to allow the usual strainercleaning.
Should you want to know more about strainer  from Reliable China valve manufacturers, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月20日星期六

Metal seated ball valve laser cladding

Metal seated ball valve laser cladding technique refers to the different ways the filler valve on the coated surface of the sphere to put the selection of the coating material, by laser irradiation so that a thin layer of the sphere surface and ball simultaneously melted and rapidly solidified form dilution and the ball low ball into the surface coating material metallurgical bonding, thereby significantly improving the wear surface of the sphere, corrosion resistance, heat resistance and oxidation processes, such as: 60 # carbon steel tungsten laser After cladding, hardness up to 2200HV above, the wear resistance is about 20 times the base 60 # steel. After CoCrSiB Q235 steel surface by laser cladding alloy, the wear resistance and corrosion resistance of flame spray were compared and found that the corrosion resistance of the former was significantly higher than the latter.
metal seated ball valves for high temperature using laser cladding alloy technology sphere surface spray valve has a good effect, using this technology, the sphere of small heat-affected zone, the hardness of spray layer higher than nickel-based thermal spraying, but spray less efficient, and the ball sphere surface spray finish lower after processing a larger amount.
So, whether it is the use of laser cladding, nickel-based alloy thermal spray technology HVOF technology, ball and seat surface wear layer hardening technique should be based on the use of working conditions, medium hardness, the manufacturer of process conditions a reasonable choice and application.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

The installation, maintenance and replacement for the Y-type strainer

Y type strainer during use inevitably encounter some problems, then how to facilitate the installation of the straineruse, repair and replacement of the strainerover it? Under normal circumstances Y-strainer Mounting Horizontal methods are based, but because the pipeline is under the influence of design or construction environment, sometimes Y-type strainermounting position it is unable to mobilize, so this time we generate a force doubts then whether Y-type strainer can be mounted vertically it?
Y type strainer is to rely on the flow of the pressure medium is the medium strainerimpurities trapped in the strainerto the strainerin order to achieve the medium coarse strainerproblem, since it is the role of the media pressure, then the Y-strainer there is no need to install in a horizontal or vertical issues, and only have a pressure differential, then after the time when the media naturally Y-type strainer out the media, it completed the task, as long as the installation is not too high, suitable for everyday maintenance cleaning straineryou can, but really it so?
Usually when you install the Y-strainer horizontal installation while Y-side down, so in order to strainermedia can be deposited under the action of gravity, in the maintenance of clean the strainerwhen you can clear impurities. When we mounted vertically, strainerimpurities can be deposited by gravity, can reciprocate in the pipeline, it will inevitably hamper the work of the strainermedia.
Special attention is needed: some users installed vertically using a Y-type strainer, Y-type end up, if at pressures not yet fully emptied, and clean the straineris likely to cause injury accident.
Y-type strainer mounting normal use can only be mounted horizontally, not vertically installed can use, where the beginning of the design should take this into consideration, but also pay attention to the mounting height of the problem and to allow the usual strainercleaning.
Should you want to know more about strainer  from Reliable China valve manufacturers, please visit www.reliavalve.com or email us via sales@reliavalve.com.

Cone strainers and strainer backwash model description

SR series strainers are petrochemical pump strainers, Y-type strainer, basket strainer, the model designation T-type strainer in front of the technology that I have described in detail in the article, the following main details Cone type strainer and backwash strainer model tag method:
First, the cone strainer and backwash strainer marking method.
Second, the cone strainer and backwash strainer structure type code.
SRZ I, steeple cone strainer.
SRF I, Horizontal backwash strainer.
SRZ II, flattened cone strainer.
SRF II, diversion backwash strainer.
Third, the cone strainer and backwash strainer end face type interfaces.
Threaded, welded connections, flanged, socket weld.
Fourth, the cone strainer and backwash strainer housing material designator.
C = carbon steel or cast steel
S = austenitic stainless steel
M = Low Alloy Steel
I = chrome molybdenum steel
H = Cr13 stainless steel
Q = ductile
K = malleable iron
R = Cr-Ni-Mo stainless steel
L = aluminum
T = copper and copper alloy
P = chrome-nickel stainless steel
V = chromium molybdenum vanadium steel
Note: The specific selection of materials should be specified in the technical data sheet strainers.
Five, cone strainer and backwash strainer flange sealing surface type code.
Projecting surface (smooth surface) = RF, concave = LF, convex = LM, ring groove surface = RTJ, the whole plane = FF, tongue and groove = TG
Six,Cone strainer and backwash strainer type illustrated.
Nominal diameter 50mm (2 "), nominal pressure 2.0MPa (150LB), connection type for the smooth face flange connection, the shell material is carbon steel are baffled T-type strainer, which is marked as: SRT I 4-2.0 -50 / C (RF).
Should you want to know more about strainer from Reliable Chinese valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月18日星期四

Metal seated ball valve HVOF technology (HVOF)

Metal seated ball valve HVOF (HVOF) mainly through a high speed abrasion resistant powder coating material is sprayed onto the substrate surface, air velocity spraying largely determines the quality of spraying, the gun can produce more high flow velocity, the wear-resistant powder coating can achieve higher velocity, so wear powder coating and the substrate material can be obtained higher binding strength and higher density, therefore better wear resistance and corrosion resistance.
Advantages of Metal seated ball valve supersonic spray coating can be sprayed superhard materials, coating hardness can even reach HRC74 or more, so the coating has good resistance to abrasion and wear resistance properties. Further, when the supersonic spraying, the substrate material is heated to high temperatures is not required, therefore the matrix material is not thermally deformed. Because physical seal valve HVOF mainly through high-speed impact wear powder coating and the substrate material to produce a combination of bonding strength than the thermal sprayed nickel-based alloys are lower, usually combined force of about 68 ~ 76MPa, therefore For high-pressure metal seated ball valve (eg CLASS1500 ~ CLASS2500 the ball) ball, using supersonic spray coating has come off its technology may be in use.
For metal seated ball valve HVOF (HVOF), coating performance indicators are mainly the following aspects: porosity, oxide content, the hardness, bonding strength, metallurgical structure, the coating stress conditions, the coating processability, coating uniformity.
Common metal seated ball valve HVOF materials: tungsten, cobalt, tungsten, cobalt-chromium, nickel-based alloys, chromium carbide, ceramics. Tungsten, cobalt and tungsten carbide cobalt chrome temperature generally does not exceed 540 ℃, to be applied to a higher temperature, typically sprayed chromium carbide and ceramic materials may be used.
Taking into account the binding force of a supersonic metal seated ball valve sprayed and spraying costs, the thickness of the coating layer is generally controlled at about 0.3mm, in order to ensure uniformity of the coating, the roundness of the ball before spraying and spray uniformity is very important, general the need to ensure the roundness by grinding balls before spraying, using computer-controlled robot to gun control to ensure uniformity of the coating, and the use of artificial methods to control the gun is difficult to ensure uniformity of the coating.
Should you want to know more about ball valve, such as trunnion ball valve from Relia Valve, please visit www.reliavalve.com or email us via sales@reliavalve.com.

Metal seated ball valve nickel-based alloy thermal spray technology

Metal seated ball valve nickel-based alloy thermal spraying is a sealed surface hardening method currently on the metal seated ball valve of successful applications, nickel-based alloy wear and corrosion resistance, heat resistance, etc., its excellent overall performance, according to our practice, nickel based alloys for gray water, black water, coal slurry, cinder and other media working conditions.
Nickel-based alloy is a fusion of gold since the main components include nickel, chromium, boron, silicon, which is the main component of nickel, a binder is wear-resistant material and the substrate material, depending on the ratio of ingredients, you can get different hardness, Metal seated ball valve commonly used HRC55 ~ 64 hardness. Through the high temperature matrix material and nickel-based alloy material is heated, enabling the substrate and the sealing surface of the wear-resistant materials to achieve metallurgical bonding, therefore, metal seated ball valve nickel-based alloy thermal spraying with high bonding strength characteristics. Compared with HVOF, another advantage of nickel-based alloy thermal spray coating thickness is larger, generally 0.5 ~ 1.0mm.
For thermal spray metal seated ball valve nickel-based alloy coating process for bonding substrates and nickel-based alloy material has a great influence, control the ball and the heating temperature nickel-based alloys is very important, the temperature is too low, the base material and the nickel based alloy material can not realize metallurgical bonding, prone to shedding of the coating material. The temperature is too high, it will result in the loss of melt nickel-based alloy material. For large-diameter sphere, since the thickness of each part of the ball is very uneven, therefore, to be precise uniform heating temperature control of the ball is very difficult, which is the main difficulty of nickel-based alloy thermal spraying, for which we have taken the medium frequency induction Sphere heating patented technology, and achieved good results.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月16日星期二

Four-way ball valve refinery coking unit maintenance and extend the life of the measures.

Throughout the four-way ball valve refinery coking unit failure, the vast majority of internal coke (between the bellows and the draft tube, between the bellows and the t the four-way ball valve sleeve, between the ball and the body) resulting in ball wear seat sealing surface scratches, due to excessive torsional moment due to various failures and other implementing agencies.
A t the four-way ball valve maintenance,
1)The four-way ball valve disintegration, cleaning parts disassembled.
2)Check each part if there is the four-way ball valve failure or damage.
3)The failure to repair or replace damaged parts.
4)Grinding sealing surface (sealing effect depends on the surface roughness of the four-way ball valve sealing surface, and the degree of agreement of the two sealing surfaces; main role is to improve the surface roughness of the polished sphere and the sealing surface of the seal seat and both parts sealing surface form-fitted).
5) Load manual test, reassembled four-way ball valve, sealing test and post-installation.
Second, measures to extend the life of the four-way ball valve .
1)Strict management and daily operations assessment, before the media in the four-way ball valve into the heating or cooling medium sweep clean scorch should first put into use steam vapor seal.
2)Periodically check the output torque of the four-way ball valve. When the four-way ball valve actuator torque shortage occurs at work (in this case the electric actuator torque should not the maximum) it means that the internal four-way ball valve coking phenomenon may occur; when the four-way ball valve actuator output torque is raised to the maximum, and an exception occurs during operation jitter, and with the growing plant operation, the internal four-way ball valve coking more serious. At this time the four-way ball valve should be overhauled.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

How to repair when V-type ball valves have the leakage?

V notch port ball valves where possible leaks are common: packing leak after leak gland, flange leak, the leak was sealed between the seat and the V notch port ball valves, actuator leaks and so on. V notch port ball valve leaks are causing the ball run, run, drip, leak phenomenon in which, V notch port ball valve leak is a very serious problem, if not pay attention caused easily lead to accidents, here I plant engineers generated from these leakage causes and solutions should be taken two ways to explain this line:
A phenomenon: V notch port ball valves packing leak.
Analysis: V notch port ball valves may be because the padding bolts not pressed;
Solution: Under normal circumstances rather tight V notch port ball valves packing gland nut can be solved V notch port ball valves packing leak problem.
Causes: V notch port ball valve operation result of the use of V notch port ball valves filling out the wear and tear;
Solution: Remove the V notch port ball valves packing cover, replace the V notch port ball valves packing.
Phenomenon II: V notch port ball valves gland leak
Causes: O-ring damage;
Solution: Replace the O-ring.
Three phenomena: V notch port ball valves flange leaks
Causes: V notch port ball valves flange gasket loses its elasticity;
Solution: Replace the flange gasket.
Analysis: flange gasket dislocation;
The solution: re-flange gasket sealing surface placed in position.
Phenomenon four: V notch port ball valves seat outside the test leak was sealed
Causes: O-ring or a graphite ring damage;
Solution: Replace O-ring or a graphite ring.
Phenomenon V: V notch port ball valves was sealed between the spool and seat leakage
Analysis: closing the actuator does not reach 90 degrees;
Solution: Adjust the actuator stroke so that it can complete in a fully closed state.
Analysis: sealing surface wear;
Remedy: Remove the V notch port ball valves seal seat, remove the ball, sealing seat and plug polished repair. If the V notch port ball valves seal seat badly damaged, replace the V notch port ball valves seal seat.
Phenomenon Six: V notch port ball valves pneumatic actuator leak.
Causes: O-ring damage is serious;
Solution: Replace the V notch port ball valves O-ring.
Should you want to know more about ball valve , such as trunnion ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月5日星期五

How to replace the packing for the manual eccentric hemisphere ball valve in the line?

Eccentric hemisphere ball valve work environment are generally more severe, so failure is when something happens, especially to replace the packing. Replacing be packing online believe that many users can operate their own, then replace the packing line, how should it work? Let me give you a simple explanation below:
(1) Turn off the eccentric hemisphere ball valve, block valve downstream deflated before removing the pressure valve in the pipeline.
(2) The eccentric hemisphere ball valve is completely closed.
(3) Twist off nut, remove the washer, wrench head and handle.
(4) Twist off nut, remove the spring washer, stem stopper and packing gland.
(5)Remove the packing for the eccentric hemisphere ball valve.
(6) Check the removed parts, if any damage to be repaired or replaced, each of the parts in clean water.
(7) Scrub and lubricating stuffing box sealing surface for the eccentric hemisphere ball valve.
(8) Into the new filler for the eccentric hemisphere ball valve.
(9) By decomposition of the inverse order of loading on the packing gland, stem stopper, spring washer, nut fastening the parts.
(10) And then loaded on the wrench head and handle, with a washer, nut fastening.
(11)Operating handle checks eccentric hemisphere ball valve open and close flexibility.
(12)Tightness test for the eccentric hemisphere ball valve.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

How to install the pulverized spray ball valve?

Users are aware of spray pulverized coal ball valve is an application extremely harsh environmental conditions ball valve, the installation is correct or not directly affect the life of the spray valve pulverized, then how the installation is correct? Following is a brief introduction for everyone:
1)First removing pulverized spray ball valve cover flange ends on both sides, rinsed clean under the valve is fully open.
2)Pneumatic ball valve and electric spray pulverized coal powder spray valve signal should be required prior to installation (electric or gas) in the test machine (to prevent vibration due to transport, affecting performance), after passing the line installation (refer electric wiring actuator wiring diagram).
3) Preparation and front pipe connections, to be washed and cleaned of impurities remaining in the pipeline (of these substances may damage the seats and balls).
4) During the installation, please does not use spray valve actuator pulverized coal as part of the lifting of the lifting points to avoid damage to the actuator and accessories.
5) This type ball valve should be installed in the pipeline horizontally or vertically.
6) The installation of the pipeline near the falls or external force cannot have the phenomenon, you can use duct work or support to eliminate the deviation from the pipeline.
7)And pipe connections, please use the specified torque cross locking flange bolts for the ball valve.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

How to carry out butterfly valve tests?

The majority of our butterfly valve product testing factory inspection and type test is divided into two categories. Butterfly valve type of inspection refers to conduct a comprehensive assessment of product quality butterfly valve, namely technical requirements specified in the standard are fully test (if necessary, but also increase test items), called type test, also known as routine tests.
1)When one of the following circumstances, butterfly valve type inspection should be carried out in general:
(1)New products or old products to the plant trial to identify stereotypes for the butterfly valve;
(2)The official production, such as structure, materials, technology has drastically changed, which may affect the valve performance;
(3) Normal production, after regular or accumulate a certain output, a test should be carried out periodically;
(4) Butterfly valve long shutdown, resume production;
(5) The factory test results and the last type testing when there is a big difference;
(6) The State Administration of Quality Supervision bodies type inspection requirements.
Check butterfly valve type test taken from the factory quality inspection departments qualified stock butterfly valve randomly selected method, or from a user-supplied but used a random sample method butterfly. The number of units and the minimum number of sampling units for each specification sampling valve according to regulations. When the user sampling, sampling for several unlimited number of sampling units based upon the requirements. When the entire family quality assessment, sampling department can be extracted from the series according to the situation two to three typical specifications butterfly test specifications for each sample based upon a predetermined minimum number of units and the number of sampling units.
2)Technical requirements and test methods for butterfly valve type test according to regulations. Each test subject butterfly valve housing, sealing test, leak tightness tests must meet all the technical requirements specified. The remaining types of test items, if they are seized with a butterfly valve in an index less than the prescribed technical requirements, it is allowed for the sample from the sampling valve in taking further the number of units required. When tested again, all the test items must comply with the technical requirements, or as unqualified goods.
Butterfly valves have the worm gearbox flange end hard seated single eccentric butterfly valve and worm gearbox flange end hard seated triple eccentric butterfly valve.
The worm gearbox flange end hard seated single eccentric butterfly valve represents the center of the butterfly valve,which is the valve stem axis, the center of the disc and the center of the body in the same position. Its advantages are simple structure, easy manufacturing, the disadvantage is due to the butterfly valve plate and seat is always in the squeeze, scratch state resistance from large, fast wear. Seat basically elastic material such as rubber and Teflon, so the temperature is limited only for low temperatures. The worm gearbox flange end hard seated single eccentric butterfly valve 150LB ~ 600LB ventilation valve in the metallurgical, chemical, building materials, power plants, glass and other industries in ventilation, dust cold or hot gas pipeline environmental projects, as the gaseous medium to regulate the flow or cutting device.
The triple offset butterfly valve, the valve stem axis refers to both departing from the center of the disc deviate from the center of the body, the shape of the cone Sealing is not a positive, but taper. The advantage is high temperature, good sealing performance. Triple eccentric butterfly valve 150LB ~300LB metal seal butterfly valve using sophisticated J-shaped elastic ring and three eccentric multi-level metal seal structure,which is widely used in medium temperature ≤425 ℃ of metallurgy, electric power, petrochemical, and water supply and drainage and municipal on construction and other industrial pipeline, for regulating the flow and the carrier off fluid use.

Should you want to know more about butterfly valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月2日星期二

What is flange ends V-type ball valves and pipe connections ?

Flange ends V-type ball valve is a ball valve V-type connected with the pipe through the flange, with its relatively corresponding V-type ball valve is threaded and welded V-type ball valve.
Flange is an important way to connect pipeline construction, flange (RF), also known as RF,RTJ or FF, flanges are connected to each other between the valve and the pipe, tube and pipe parts for pipe end The connection between; it is the two pipes, fittings or equipment attached to each one of the flanges, flange gasket between the two flanges together with bolted together to complete the connection, but sometimes Some fittings and valves has been carrying flange, also belong to the flange connection, flange connection V-type ball valves are easy to use, able to withstand greater pressure on industrial pipe flange V-type ball valve use more widely, because Industrial pipe diameter is relatively large, and it is relatively large pressure.
V-type ball valve and pipe connections .
Select the connection V-type ball valve with the line or between devices is right and proper, it will directly affect the V-type ball valve generation run, run, drip, drain phenomenon of probability.
V-type ball valve connections include: flanged, wafer, welded connections, threaded connections, sleeve connections, clamp even
First, Flange ends V-type ball valve
V-type ball valve at both ends with a flange, and the flange on the corresponding pipe, installed in a pipe bolted flange. V-type ball valve flange connection is the most frequently used form of connection. There flange raised face (RF), plane (FF), convex and concave surfaces (MF) and other points. Press the combination of surface shape can be divided into the following categories:
1)Smooth style: not for high pressure valves, processing more convenient.
2)Lenticular: higher working pressure, can be used in hard-washer.
3)Tenon slot: Available plastic deformation larger washers use in corrosive media is more extensive and better seal.
4)Trapezoidal trough: oval metal ring gasket for use in the working pressure ≥64 kg / cm of valves, or high temperature valves.
5)Lens type: washer lens shape, made of metal. For operating pressure ≥100 kg / cm high pressure valves, or high temperature valves.
6)O-ring type: This is a relatively new form of flange connection, it is with the emergence of a variety of rubber O-ring, and developed, it is generally flat washers reliable sealing effect on the ratio.
Second, the clip connection V-type ball valve.
Wafer V-type ball valve mounted on two intermediate flanges, the body often have locating holes for easy installation location, directly through the V-type ball valve and pipe connection in the form of two clamped together with bolts.
Third, the welded connection V-type ball valve.
1)Welded connections: V-type ball valve ends by butt welding butt groove processed into the corresponding groove and pipe welding, pipe fixed by welding.
2)Socket weld: V-type ball valve socket weld ends according to the requirements of the processing, and pipeline socket weld connections.
Should you want to know more about ball valve, such as trunnion ball valve from Relia Valve, please visit www.reliavalve.com or email us via sales@reliavalve.com.

What’s the difference between the V-type ball valve and eccentric hemisphere ball valve?

Is the V-type ball valve same with eccentric hemisphere ball valve? That's a lot of V-type ball valve and the V-type ball valve and eccentric hemisphere ball valve, we will detail for you on doubts.
V-type ball valve although both belong to the eccentric half ball valve series, but V-type ball valve is not that eccentric hemisphere ball valve, the difference between them is as follows:
Is the use of eccentric hemisphere ball valve eccentric ball and seat, when the valve stem rotates the self-centering in the common trajectory, the closing process more closed more tight, fully achieve a good sealing purposes. The eccentric hemisphere ball valve ball and seat completely out, eliminating the wear ring to overcome the traditional ball valve seat and the sealing surface of the ball is always the problem of wear seat metal surfaces are well protected. This product is particularly suitable for steel, aluminum, fiber, tiny solid particles, pulp, coal ash, petroleum gas and other media.
Eccentric eccentric hemisphere ball valve working principle: usually double eccentric semi-ball, that the sealing surface and the shaft center of the eccentric center, and eccentric, valve and valve seat and the valve shaft center of the flow-through center bonding surface formed about 3 degrees rotary cutting angle, it is relying on this cutting edge angle of the actuator torque force into self-locking wedge than the pressure seal, eccentric half ball Features:
1)Spherical pinch valve, easy to crystallize stammer was destroyed for crystallization, stuttering and not clean medium situation.
2)The flow path is simple, Kv value is large, good self-cleaning properties.
3)Small size, light weight.
4)Suitable for two-position control. It has a regulatory function, and open fast, lightweight, wear self-compensation, can get rid of scale on their own. For conveying precipitation, scaling, crystallization, containing impurities of two or more media.
V-type ball valves are fixed (diffrent from trunnion ball valve), also single seat seal valve, regulating valve in the best performance,which is equal percentage flow characteristic, adjustable ratio of 100: 1. With a shearing action between its V-notch and metal seat, especially for containing fibers, tiny solid particles, slurry and other media. Applicable to the regular operation, open and close quickly, lightweight, fluid resistance, simple structure, relatively small size, light weight, ease of maintenance, good sealing performance, unrestricted installation direction, the flow of media can be arbitrary, no vibration, noise .
For the V-type ball valve and eccentric hemisphere ball valve,we think eccentric hemisphere ball valve more durable, V-type ball valve adjustment better. The main difference between the V-type ball valve and eccentric hemisphere ball valve that: V-type ball valve is used in with a flow regulation and working conditions in the media as having impurity particles of fluid. Eccentric hemisphere ball valve does not have the flow regulation, but can also be used in fluid conditions have foreign particles.
Should you want to know more about ball valve from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

2016年8月1日星期一

How to adjust the pneumatic V-type ball valves?

Pneumatic V-type ball valve is composed of two parts,V-type ball valve and pneumatic actuators consisting of pneumatic V-type ball valve of regulation primarily by pneumatic actuators to achieve, how it is possible? Here,we will detail the process of its implementation:
Pneumatic actuator is driven by the actuator portion which receives the pressure signal electric / pneumatic valve transducer (or electric / pneumatic valve positioner) output and converts it to the corresponding linear displacement of the plunger to push adjusting means.
Pneumatic actuator can be divided into film, piston, rolling diaphragm, rotary vane and other types. Among them, the first three belong to linear actuators, their testimony compressed air power component in linear motion, power unit rotary vane actuator testimony in compressed air rotary motion, is typical of rotary pneumatic actuator.
1. The pneumatic diaphragm actuator for the V notch ball valve.
This executive body more commonly, it is characterized by simple, inexpensive, reliable operation, easy maintenance; not the positioner, the spring can be realized only rely on the implementation of proportional action; when the air supply is interrupted, the pusher automatically returns without signal position, and is equipped with V-type ball valve, can provide a source of security role off the production. But its output stroke is small, it can only accept a lower operating pressure, the maximum pressure is generally 0.25 ~ 0.4MPa, only direct drive V-ball valve stem, therefore, mainly used for general pneumatic regulating valve V-type push devices.
Pneumatic diaphragm actuator can be divided into two types of spring and without spring, there are two kinds of action and reaction mode of action. As shown, when the film-forming chamber gas pressure increased, V-type ball valve stem direction to extend the action film chamber positive-acting actuators, the direction of movement back into the film chamber is reaction type. Different modes of action of the actuator for the V-type ball valve varieties constitute the open air and gas off two functions provided for convenience only. The practical application of the film are the property of pneumatic actuators with spring type of execution, no spring is seldom used.
Now there is a spring in the usual positive-acting pneumatic diaphragm actuator explain the structure and role of the principle. When the signal pressure through the membrane cover 1 and 2 consisting of corrugated diaphragm chamber to produce a thrust on the diaphragm, the push rod 5 downward and the compression spring 6, when the spring force and the signal When the thrust generated by the pressure on the diaphragm balanced, stable putter in a corresponding position, the push rod actuator displacement output is also known as stroke. This actuator is the ratio of the output characteristics, the output displacement and input signal proportional to the pressure.
Pneumatic diaphragm actuator stroke specifications are 10, the effective area of ​​the diaphragm and other 16,25,60,100mm have 200,280,400; 630,1000,1600c resistance of six specifications, the greater the effective area, the greater the thrust actuator.
Should you want to know more about ball valve, such as metal seated ball valve from Relia Valve, please visit www.reliavalve.com or email us via sales@reliavalve.com.

The pneumatic piston actuator for the V-type ball valve

Features piston actuator for v notch ball valve is the stroke length, but the price is expensive, so only for special occasion needs. It is also divided into two types of spring and without spring. Piston actuator acceptable higher operating pressure, air pressure and can be reached 0.5-0.7MPa, so its large output power.
Piston actuator with a spring itself can achieve a proportional action and the two movements, as compared with no spring piston actuator, can automatically create two forms of normally open and normally closed, and has broken a source of security, and improve in use security and reliability. Structure without a spring piston actuator is relatively simple, because do not have to overcome the spring reaction force, and therefore has a greater output power. It has two action and proportional action in two operation modes, in which the two sides of the piston action by the switching operation of the pressure to achieve, while the proportion of the action when the control signal is changed, on both sides of the piston to establish the necessary pressure difference, when the piston reaches the signal proportional to the stroke, the pressure on both sides by means of a double-acting piston V-ball locators, the piston maintained in a stable position.
Should you want to know more about ball valve from  Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.

How to select the Y-type strainer(Y type filter)?

Now, as industrial production in a very important job filtration equipment - Y type strainer(Y type filter) has been applied to a variety of devices, it enables normal operation of machinery and equipment, serves to process more secure, stable and efficient role in the process Sewage, industrial production produced played a very significant effect, and the role of Y-type strainer(Y type filter) in other industries are also gradually emerging as an important device components, which contributed in promoting industrial development!
Y-type strainer(Y type filter) has many types, along with our rapid economic development, to meet the needs of a variety of special conditions, the Y-type strainer(Y type filters) are still growing, they also do not play the same role, in practical application, Y-type strainer(Y type filter) effect is not the same focus, such as air filter, it only needs to reach a certain air cleanliness, reduce the content of harmful substances in the air on it! Liquid filter and air filter similar, mainly to reduce pollutants, so many filter should be how to choose? Of course it is the right medicine!
First, choose the pipe diameter and the same with, then that it can withstand the pressure levels used to adapt to the environment, the most important thing is to hole mesh, and the role of Y-type strainer(Y type filter) is reflected here, hole mesh determines how much it The fine level! Then there is the filter material and resistance losses.
For flammable, explosive, toxic medium, and small diameter pipe filter optional socket weld, often need repair and replacement, and should use the filter flange connection. Filter body materials should be consistent with the corresponding pipe material or equivalent, when the filter no special requirements, are stainless steel mesh. More solid impurities, viscosity of the working medium, choose a larger filtration area is appropriate filter basket, select the filter mesh should be considered to meet the needs of the process or of pumps, compressors and other fluid transportation machinery for protection purposes.
In fact, water filter role is to isolate impurities before the water filter, to prevent damage or blockage harmful impurities pumps, chillers, and other equipment. Straight basket type water filters and Y-type water filters compared to the following advantages:
1) Straight basket type water filter structure is simple, the cost is lower than the Y-type water filters. Straight basket type water filters the flow area, filter resistance is lower than the Y-type water filters.
2) Straight basket type water filter does not change the flow of water, the filtration resistance is smaller than the Y-type water filters.
3) Straight basket type water strainer disassembly cleaning easy.
Straight-type water filters can be installed on-site production, but also industrial production, it should be worthy of a water filter.
Should you want to know more about strainer from Reliable China valve manufacturer, please visit www.reliavalve.com or email us via sales@reliavalve.com.