Ball Valve

Ball Valve Introduction
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Why natural gas pipelines must use forged steel ball valves

The natural gas pipeline forged steel ball valve is a forged steel structure, which is especially suitable for working conditions of gas, purified natural gas, acid natural gas, water, coal slurry and oil. It is suitable for oils with Class150~Class1500 and working temperature of -28~300°C. In the pipelines of various working conditions, such as chemical and thermal power stations, it acts to cut off or turn on the medium. Because the material of the forged steel ball valve is also carefully selected, the wall thickness of the valve body and the bolt strength of the valve body are in accordance with the requirements of the American standard ASME B16.34, and are strictly calculated to ensure the corresponding valve body pressure level and joint. Reliable strength. The ball adopts a fixed structure, a floating valve seat, which can achieve a small torque under operating pressure. A metal bushing with self-lubricating PTFE is used to cooperate with a high-strength, high-gloss valve stem to minimize the friction coefficient. The pipeline forged steel ball valve uses a polymer material as the seat seal, and the seal …

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Comparisons of Pneumatic Ball Valves and Electric Ball Valves

The pneumatic ball valve consists of the ball valve and the pneumatic actuator. It generally needs to be used in conjunction with accessories including the magnetic valve, air treatment FRL, limit switch, and positioner so as to be controlled remotely and locally as well as to be opened and closed in the control room. It improves safety, largely saves the cost of human resources and time, and makes manual control on site, above the ground and in dangerous palces not needed any more. CLASSIFICATIONS OF PNEUMATIC BALL VALVES According to the material, pneumatic ball valves can be divided into stainless steel pneumatic ball valves, plastic pneumatic ball valves, sanitary pneumatic ball valves, carbon steel pneumatic ball valves, cast iron pneumatic ball valves, etc.According to the connection mode, pneumatic ball valves can be divided into pneumatic flanged ball valves, screw thread pneumatic ball valves, welded pneumatic valves, etc.According to pressure, pneumatic ball valves can be divided into low-pressure pneumatic ball valves, middle-pressure pneumatic ball valves and high-pressure pneumatic ball valves.According to the channel position, pneumatic ball valves can be divided into throughway …

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Float Ball Valve design feature

BOW-OUT PROOF STEM For the purpose of preventing the stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the contact position of the shoulder at lower part of the stem and ball valve body.Thus an inverse seal seat is formed which will prevent leakage and avoid accident. KEY LOCK Locks can be used to lock the manual valve when it is fully open or closed so as to prevent non-working personnel from pulling the handle which may result in misoperation of valve.It can also avoid opening or closing of valve resulting from the shock from pipelines or unpredictable factors that may cause an accident.For working pipelines such as combustible and explosive oil,gas and chemical medium,or for field piping site,the locking mechanism is especially useful. ANTI-FIRE SAFE DESIGN When the floating ball valve be used normally,its sealed by seat and ball surface,seat retainer sealed by O-ring and body,this is soft …

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