- pneumatic ball valve Jacket type pneumatic valve technical characteristics

jacket ball type pneumatic ball valve technical features
jacket type pneumatic valve is widely used in the oil and gas pipeline, and oil production, oil refining, petrochemical, chemical, chemical fiber, metallurgy, electric power, nuclear power, food and paper and other devices. Remove simple jacket type pneumatic valve in the pipeline ball fast, convenient and quick maintenance. When pneumatic valves on the pipeline failure needs to be repaired, don't need to remove the pneumatic valve from the line, just pull down the flange bolts and nuts, the pneumatic valve cover and pneumatic valve rod assembly from the aerodynamic body together, then take out the ball and pneumatic seat assembly. Online repair sphere and pneumatic seat. This saves time of maintenance, will produce to minimize the loss. Jacket type pneumatic valve is divided into a floating ball ball pneumatic valve and the fixed ball ball valve. With floating ball pneumatic valve nominal size DN or less. Places a compression spring on the sphere, the effect of compression spring is places pre-tightening force on the sphere, the pneumatic valve seat sealing surface under any circumstances close contact, sealed performance is good. Pneumatic seat and aerodynamic body contact surface of the wedge Angle as the °, pneumatic valve seat can self-locking, on line direction, when there is greater pressure of pneumatic valve seat, pneumatic seat does not produce any displacement. Therefore, the structure of the pneumatic valve has the characteristics of both the brake of the pneumatic valve and the advantages of the pneumatic valve with ball. Found in the maintenance checks, pneumatic valve body and seat is easy to leak, if increase the pre-tightening force of spring, is bound to increase pneumatic ball valve closing torque. In order not to increase the closure torque pneumatic ball valve, pneumatic valve seat sealing surface in the back with a rubber o-ring, solve the problem on the back of the pneumatic valve seat sealing surface leakage. Jacket type fixed pneumatic ball valve fault is spring pre-tightening force can't regulate and control, and assembly of large amount of spring compression, assembly difficulty. In order to solve this problem, spring ANSI instead of material selection. ANSI spring stiffness is good, its corrosion resistance and close. In addition, increased the spring seat and adjusting nut, on the pneumatic spring seat seat cylindrical and thread cutting, respectively, with the adjusting nut to spring pressure inside the spring seat, the pneumatic seat assembly into pneumatic valve body. Because the spring has been compressed before installing a sphere, so very convenient installation sphere. When the ball after the assembly, the adjusting nut to exit the spring seat, spring smaller prestressing force on a sphere at this time. If you want to increase the pre-tightening force, can be used to adjust the adjusting nut.
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