Reduced Bore Ball Valve selection principles

1, the transport of oil, natural gas main line, you need to clean pipelines, they need to be buried in the ground, the choice of a full-bore, all-welded construction ball valve; buried in the ground, full bore welded connection or flange connection ball valve ; manifold, the choice of flange connection, welding, full bore or reduced bore ball valve.

2, refined oil pipelines and storage equipment, the choice of ball valve flange connection.

3, city gas and natural gas pipeline floating ball valve, the selected flange connection and internal thread connection.

4, The the metallurgical system of oxygen pipeline system should be selected through rigorous degreased, fixed ball valve flange connection.

5, on the the cryogenic medium of piping systems and devices, should use coupled with the low temperature ball valve bonnet.

6, the refining units FCCU pipeline system on the choice of the lift rod ball. Fixtures and piping systems, chemical systems acid and other corrosive media, should be selected austenitic stainless steel, PTFE stainless steel ball valve seat ring. Metallurgical systems, power systems, petrochemical plants, urban heating systems in the high-temperature media pipeline system or device, the choice of a metal to metal seal ball valve.

7, the need for flow control, the choice of the worm gear, pneumatic or electric, with a V-shaped opening ball valve.

8, the working temperature of 100 degrees Celsius to 200 degrees Celsius, the ball valve, sealing materials the general election PPL, Body material should be selected WCB stem materials should be selected the stainless iron sphere material to be elected general stainless steel <201>.

9, the working temperature of 250 degrees Celsius to 400 degrees Celsius, the ball valve, the sealing material should be selected hard is sealed <H or Y>. Body material should be selected WCB, stem material should be selected stainless iron sphere material should be selected stainless steel

10, the working temperature of 400 degrees Celsius to 550 degrees Celsius, the ball valve, the sealing material should be selected hard is sealed <H or Y>. Body material should be selected chromium molybdenum steel, the sphere material should be selected chromium molybdenum steel, stem materials should be selected chromium molybdenum steel.

11, the working temperature of 600 degrees Celsius, the ball valve material: seals, valve body, sphere, stem generally select