Search Results for: floating ball valve
30. June 2014 · Comments Off · Categories: BALL VALVE

Relia valve was awarded the order for a Korea client, for which nearly all the valves are ball valves(made by China ball valve manufacturer). The sizes and pressure ratings cover 1/2” to 20”, pressure rating from Class 150 up to Class 2500. Most of the small size forged floating ball valves are with nipple (PBE: Plain and Beveled End /POE: Plain One End /TOE: Threaded One End) as requested. Other small size forged floating ball valves are NPT or SW ends connection. The body material are ASTM A105N for small size forged ball valves.

Small Size Forged Floating Ball Valves With Nipple

Small Size Forged Floating Ball Valve With Nipple

The third party inspector said highly of the ball valves especially the quality of nipple welding, the performance and surface treatment.

By Kevin Tsai for Relia Valve-Professional China valve supplier, China gate valve & China check valve supplier.

Related Article: Forged Steel Gate Valves Are Under Package

24. June 2014 · Comments Off · Categories: BALL VALVE

Forged Steel Floating Ball Valves Delivered to Canada

More than one hundred pieces of forged steel floating ball valves were exported to Canada. The order is from our Canadian customer, which has very good reputation in ball valves.  The client has their representative inspect the ball valves strictly in our factory; they are very satisfied after the inspection.

Ball valve is the key product of Relia valve, floating ball valves, trunnion ball valve, top entry ball valves and fully welded ball valves are available. The company is API 6D and CE approved, supplying tailor-made valves for special project.

 

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By Kevin Tsai for Relia Valve-Professional China valve supplierChina gate valve & China check valve supplier.

25. June 2014 · Comments Off · Categories: BALL VALVE

The Stainless Steel Floating  Ball Valves Passed The Helium Leakage Test Successfully

More than 60 pieces of forged stainless steel ball valves were tested by Helium and passed successfully.

The Helium Leakage Test is the advanced technology for mass spectrometer leak detection, vacuum gauge and helium leak calibrations, vacuum equipment, maintenance and repair support.

Relia manufactures and supplies high quality ball valves (made by China ball valve manufacturer), which is available of kinds of strict test and inspection. However, these tests and inspection shall be addressed at time of enquiry, so that we can review and send you our best proposal.  Relia also supply high quality fully welded ball valves, cryogenic ball valves and top entry ball valves etc.

ball valve Helium Leakage Test

forged stainless steel ball valves

forged stainless steel ball valves

By Kevin Tsai for Relia Valve-Professional China valve supplier, China gate valve & China ball valve supplier.

14. September 2015 · Comments Off · Categories: BALL VALVE

In addition cinder ball valve, spray ball valve pulverized coal, others, like the floating ball valve,trunnion mounted ball valve, V-type ball valve, eccentric semi-ball valve, three way ball valve, which has two seats, the first seal means that the inlet end seat acts as a seal, the back seal means that seal the outlet end of the seat from the actual principle is very simple, which is to seat sealing O-ring sealing surface on the outside of the seat within the differences and. There is also a two-way sealed DIB structure; its principle is to increase the O-ring, the inner circle within the valve seat ring, the outer ring outside the seat.

After the back seat seal trunnion  ball valve, the fluid pressure on the ball and seat effective force is small, therefore, the bearing load and friction torque are small, which gives the drive and bearing design, especially for low friction coefficient with self-lubricating properties, but the choice of compressive strength is low, there is a tendency of cold PTFE sliding bearings to provide a convenient, the disadvantage is that the valve seat seal: To ensure da> dw, if not reduce the valve channel cross-sectional area, it is necessary to increase the size of the ball and the body’s structure.

For the first seal, the back sealed on both sides of trunnion mounted ball valve, the advantage of reliable sealing performance, low bearing loads, so it is suitable for sealing particularly demanding situations, when the ball valve body cavity pressure P2 abnormally elevated, it cannot automatic pressure relief, therefore, when using double sealed ball transporting liquefied gas, the need to coat the body of a small safety valve.

When the fluid pressure PN≥16MPa, valve size DN = 80-200mm, the general use of the back seat seal, for delivery pressure PN≤10MPa corrosive media and gases, as well as valve size larger occasions, should be adopted valve seat before sealing, the sealing requirements are particularly stringent, or more dangerous media, we recommend using double-sided seal valve, in order to increase the sealing performance, reduce friction and wear seat, extend its life and to prevent the ball valve use due to damage caused by accident seat, oil seal structure can be added in the seat, but it must be noted that only the auxiliary oil seal from the seal, or as a temporary emergency measure, oil seal structure used for larger diameter and conveying gas trunnion mounted ball valve medium.

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.

Related Products
LC3, Trunnion Mounted Ball Valves, Class 900 

Trunnion Mounted Ball Valves,  LF2

A105 Trunnion Ball Valve, Full Bore

 

 

03. September 2015 · Comments Off · Categories: BALL VALVE

O-ring ball valve with floating or fixed design(called trunnion ball valve), the relative motion parts are very small coefficient of friction self-lubricating material, thus operating a small torque, in addition to long-term sealing sealing grease, making the operation more flexible, O-ring ball valve can play the role of regulation and cutting , commonly used in the two control that flow path is simple, fully formed straight channel fully open, the pressure loss is minimal, especially for high viscosity, suspension, pulp and other fluids occasion, reliable sealing, leakage small, soft seal Ball can achieve bubble tight. The differences between O-ring ball valves and ordinary ball valves are as follows:

1)Fluid resistance for the O-ring ball valve.
Ball valve generally has the full bore and reduce bore,the two structures, no matter what the structure, flow resistance coefficient ball valves are relatively small. Conventional valve is a straight-through, also known as full-flow type valve, the channel diameter is equal to the pipe diameter, resistance loss only if an equal length of the pipe friction resistance. In all ball valve valves, fluid resistance O-ring ball valve is minimal. A decrease in the resistance of the pipe system in two ways: First, reduce the fluid flow rate, would be to increase the diameter and the valve size, which will greatly increase the cost of piping system. The second is to reduce the valve local resistance, O-ball valve is the best choice.
2)The switch quickly and easily for the O-ring ball valve.
O-ring ball valve just rotated 90 degrees to complete the fully open or fully closed, it can quickly opened and closed.
3)Good sealing performance for the O-ring ball valve.
O-ring ball valve seats vast majority are using PTFE (PTFE) and other manufacturing an elastic material, commonly referred to as soft seal valve. Soft seal valve has good sealing performance, and the sealing valve surface roughness and precision requirements are not high.
4)Long life for the O-ring ball valve.
Since polytetrafluoroethylene (PTFE or F4) have good self-lubricating, low coefficient of friction with the ball. Due to the improved process reduces the roughness of the ball, thus greatly improving the life of the ball valve.
5)High reliability for the O-ring ball valve.
(1) Ball and a pair of sealing seat will not scratch occur, sharp wear and other faults;
(2)Be changed to stem a built-in, eliminating the stem under fluid pressure may be due to the packing gland Loosen flying accidents;
(3) Anti-static, ball refractory structure can be used to transport oil, natural gas, coal gas pipeline.

Related Article:

What is the discharge 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.

26. August 2015 · Comments Off · Categories: BALL VALVE

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.

03. July 2015 · Comments Off · Categories: BALL VALVE

The classification and application for the ball valves.
Ball valve in the pipeline is mainly used for cutting, distribution and change the direction of media flow. Ball valve has the following features:
1) Fluid resistance, the pipe resistance coefficient equal to the same length.
2) Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate remote control.
3) Easy maintenance, simple ball valve, seals are generally activities, the removal replacement is more convenient.
4)Simple structure, small size and light weight.
5) Close and reliable sealing surface material widely used plastic, sealing, and has also been widely used in the vacuum system.
6) In the fully open or fully closed, sealing surface and the dielectric isolation ball and seat, through the media, will not cause erosion of the sealing surface. In recent years, a new type of ball valve the valve is widely used, it has the following advantages:
Ball valve has been widely used in various sectors of petroleum, chemical, power generation, paper, atomic energy, aviation, rockets, as well as people’s daily lives. Ball valves form of the structure can be divided into three types as follows:
First, the ball is fixed, no pressure produces no movement. Fixed ball valve or trunnion monuted ball valve.
Second, the elasticity ball.The ball is elastic. Ball and valve seat rings are metal materials, sealing pressure than the large, rely on the pressure medium itself has reached less than the requirements of the seal, must apply force. This 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.

Third, the hard seal ball is floating under medium pressure, the ball can produce a certain displacement and pressed on the sealing surface of the outlet end, ensure the outlet end seal. Simple floating ball valve 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 ball valves. Ball in the wider application of irrigation systems, mainly used in the branch entrance. Ball simple structure, small size, resistance to fluid flow is small, the disadvantage is turned on or off too quickly, it will produce water hammer (water speed when a sudden change in pressure in the pipeline will rise) in the pipeline. Therefore should not be used in the main pipe valve can be used in the dry end of the branch pipe, or use as wash, rinse sewage effect.

Ball valve can be divided according to their channel positions straight-through, tees and right angle. After two valve for dispensing the media and change the flow of media. All with a floating ball valve seat, by medium pressure, the ball 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 valve operating torque and increase the reliability of the seal, 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, but also reduce operating torque more suitable large diameter high pressure valve. Forged steel fixed ball
Ball valves have the O-type ball valve and V-type ball valve. O type ball valve with floating structure, the ball core for precision casting, surface hard chrome plated, seat with PTFE material, the same runner and pipe diameter, maximum flow capacity, flow resistance is extremely small, closed without leakage, generally do switch valve, especially for high viscosity, fibrous, granular media; V-type ball valve fixed structure, has opened a V-notch ball core, enabling proportional control, flow characteristics such as the approximate percentage.

Posted by Relia Valve, Professional China valve manufacturer and China wafer valve supplier.

03. July 2015 · Comments Off · Categories: BALL VALVE

The sealing surface damage and reasons for the metal seated ball valves.
Since the cut-off and turned seals plays, regulation and distribution, separation and mixed media and other acts on the valve passage, the sealing surface often subject to corrosive media, erosion, abrasion, easily damaged.
Some causes of damage the sealing surface is damaged and natural damage two kinds. Man-made damage is due to ill-designed, manufacturing is not fine, improper selection, installation errors, use good and inadequate maintenance caused by such factors. Natural damage, the metal to meta seated ball valve is worn under normal operating conditions, the inevitable damage to the media on the sealing surface corrosion and erosion caused .

Causes damage to the sealing surface for the metal seated ball valves, which can be summarized as the following categories.
1)The sealing surface machining quality is not good, mainly in the sealing surface cracks, porosity and other defects clip ballast, welding and heat treatment specifications due to improper selection and poor welding and heat treatment operations caused by the sealing surface hardness is too high or too low, because the selection is not caused by improper or heat sealing surface uneven hardness, corrosion intolerance, mainly due to the welding process will come on top of the base metal blown, dilute the sealing surface of the alloy composition caused a. Of course, there is also a design problem for the metal seated ball valves.
2) Selection of improper operation and damage caused by the bad. Mainly working conditions in the absence of choice by the metal to meta seated ball valve, the metal to meta seated ball valve when the throttle use, led to the closure than the pressure is too large and too close or closed lax, the sealing surface by erosion and wear.
Installation errors and inadequate maintenance led to the sealing surface is not working properly, the metal to meta seated ball valve sick operation, premature failure of the sealing surface.
Chemical corrosion medium, the medium surrounding the sealing surface without current is generated, and the sealing surface of the medium directly from the chemical reaction, corrosion of the sealing surface.
3)Mechanical damage, the sealing surface in the opening and closing over we will produce scratches, bumps, pinch and other damage. Between the two sealing surfaces, under the action of high temperature and pressure generation atomic mutual penetration, resulting in blocking phenomenon. When the two are mutually seal surface, easy to pull adhesions tear. The higher the surface roughness of the sealing surface, this phenomenon is more likely to occur. During shutdown valve, the metal to meta seated ball valves flap in the back seat process will bruise and pinch sealing surface, the sealing surface of the local wear or indentation.
4)The erosion of the medium, it is the medium flowing on the sealing surface abrasion, erosion, cavitation results. Medium at a certain speed, medium fine floating collision sealing surface to cause local damage, direct high-speed flow of medium sealing surface erosion to cause local damage, when Francis and local media vaporized bubbles bursting impact seal working surface, causing local damage. Erosion coupled with chemical media corrosion alternation, strongly sealing surface erosion.
5)Electrochemical corrosion, the sealing surface contact with each other, the concentration and the sealing surface of the metal to meta seated ball valve closing body contact and poor medium, the oxygen concentration was poor, will have a potential difference, electrochemical etching, so that one of the sealing surface of the anode is corrosion.
6)Fatigue damage, the sealing surface in the long run, in the role of alternating load causes the sealing surface fatigue, cracking and peeling off the layers appear. Rubber and plastics after long-term use, prone to aging, resulting in poor performance.
From the above analysis of the cause of damage to the sealing surface can be seen to improve the quality and life of the metal to meta seated ball valve sealing surface, you must use a suitable sealing materials (see Materials section), reasonable seal structure and processing methods.

Posted by Relia Valve, Professional China valve manufacturer and China wafer valve supplier.

03. July 2015 · Comments Off · Categories: BALL VALVE

The classification of the ball valves as follows:
The ball valves have included the floating ball valve, trunnion mounted ball valve, three way ball valve, stainless steel ball valve piece ball valve, cast steel ball valve, pneumatic actuator ball valve, electric actuator ball valve,jacketed ball valve, fully welded ball valve and high platform ball valve.

Domestic production of ball manufacturers are more connected mostly non-uniform size. Design is according to API 6D “ball valve structure length” based utility category. Currently most of the ball valve manufacturer in accordance with this standard design and production.

1)Floating ball valves.
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, by a high pressure shocks in , the ball may be shifted. This structure is generally used in low pressure valve.
2)Trunnion mounted ball valve.
The ball valve is fixed, no pressure produces no movement. Trunnion mounted ball valve comes with a floating valve seat, by medium pressure, the ball 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 ball valve operating torque and increase the reliability of the seal, 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, but also reduce operating torque more suitable large diameter high pressure valve.
3)Three way ball valve,tee ball valve.
Three Way ball valve with a T-type and L-type. T-pipes allows three orthogonal interconnected and cut third channel, from the division, a
joining effect. L type can only connect two pipes mutually orthogonal, can not communicate with each other while maintaining the third pipeline, only play the role assigned.
Three way ball valve features as follows:
(1).The three-way ball valves in the structure integrated structure, 4 seat sealing surface type, small flange connection, high reliability,
design and implementation of a lightweight
(2)Three balls wick T type and L-type, long life, large flow capacity, small resistance
(3)Ball valve points by acting single and double acting two types, single-action feature is the power source in the event of failure, the ball will be in the state control system requirements.

4)Piece ball valve.
Piece ball valve can be divided into one-piece ball valve, two-piece ball valve, three-piece ball valve, cantonese-style ball valve, the difference is as follows:
Cantonese-style ball valve and one-piece ball valve belong to one type, namely a valve ball mounting from the side, and then tighten the cap, two-piece plus a body composed of a bonnet, a three-piece body is a plus both sides of the valve cover, three-valve easy to install, do the thread and welded, and washable maintenance easier.

Posted by Relia Valve, Professional China valve manufacturer and China wafer valve supplier.

02. July 2015 · Comments Off · Categories: BALL VALVE

Three way ball valves working principle as follows:

Under the three-way ball valve is suitable for -46 to + 200 °C temperature on corrosion and non-corrosive liquids, gases, powders media to switch, mix and split; opening and closing process, unobstructed flow path reduces pressure loss and effortless operation, easy maintenance; can be manual, pneumatic, electric control.

Three way ball valves structural features as follows:

1)The three way ball valves seat can be designed to seat four floating ball and fixed ball, fluid stable, reliable sealing;

2)The structure of three way ball valves can be designed into the side-mounted and roof-mounted, two-way seal design; no stream flow switch;

3)Anti-stem design fly;

4)Anti-static design;

5)two (open and closed positions) locking design.

Three way ball valve in our career is very rare and universal application, individual ball valve used in plumbing, serve probation conditioning flow,which has the T-type ball valve and L-type ball valve, long application life, smooth to large, small resistance. Ball valve with the valve belong to the same paradigm, the difference in its closure is a sphere, the sphere around the body to reach the core wire for reverse open and closed a valve. Important valve in the pipeline to make the interception, deployment activities with changing media bias. Ball is a new valve over-year to be generally adopted,

Three way ball valves task the truth:

The first is in the process of opening  for the three way ball valves:
1)In the closed position, the three way ball valve stem of the machine by pressing the ball probation, pressed against the valve seat.
2 )When the hand wheel counterclockwise to move the stem is the reverse activity, which makes three-dimensional sphere disengaged from the bottom of the seat angle.
3)Stem continued promotion, and the spiral groove with the stem guide pin influence each other, so that the ball began to reverse without friction.

4) Up to full status, stem promoted to the limit position, the ball rotated to the fully open position.

Closed process for the three way ball valves:
1)Closed hand wheel clockwise twist, lower stem and the ball began to separate from the seat began to reverse.
2 )Keep twisting hand wheel, stem was embedded in the spiral groove thereon probation guide pins, so the stem with the ball while twisting 90 °.
3)Nearly closed sphere has no seat in the case of war reversed 90 °.
4 )Hand wheel to move the last number of laps, angle-dimensional machine wedged at the bottom of the stem to squeeze the ball to tightly pressed against the seat, reach a complete seal.
Posted by Relia Valve, Professional China valve manufacturer and China wafer valve supplier.