API dual-seal lift plug valve

API lift plug valves

There are a variety of lift plug valves, plug valves by elevating the material sealing surface is divided into soft and hard seal sealing the two. The basic principle is turned on so that when the rising cock, cocks, and then rotate 90 degrees to the full process of the valve and valve body to reduce friction sealing surface; the closure of the valve when the faucet so that a 90-degree rotation and then drop to the closed position and valve body to achieve sealing contact with sealing surface.
1, dual-sealed lift plug valves
Double soft sealing plug valves 's structure. Faucet body panels for a combination of three cylindrical plug valve, mounted on both sides of the rubber sealing surface on the board, plug the middle for the cylindrical wedge.
Open the valve so that when the transmission cocks rise, driven both sides of the plate, so that combination of plug and the valve from the sealing surface, and then led a 90-degree rotating plug to the wide-open position of the valve.
2.Close the valve when the drive mechanism so that combination of 90-degree rotating plug to the closed position, then push plug decline at the bottom of both sides of the plate in contact with the valve body is no longer down the middle wedge Cypriots continued to decline, through the promotion of slope on both sides of import and export of mobile terminal board so that the soft side of the valve body sealing surface with sealing surface contact to achieve the seal by compression.
3.Double sealed plug valves have a double lift blocking and emission features, with the pressure balance valve device to prevent abnormal boost system, and gate valves can reduce the resistance moment. Ring has been compressed as a result of the metal surface after contact with each other, with the fire safety valve function. 4.Valve maintenance is very convenient, you can not demolish the body from the pipeline, the valve body through at the bottom of the demolition will be able to cover both sides of the plate removed from the valve replacement. And therefore are widely used in petroleum, natural gas, metallurgical and mining, gas works, light textile, ship terminals, food and environmental water treatment and other industries to make adjustments, use of hoist line fluid.

1, the design and manufacture: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357.
2, flange size: JB/T74 ~ 90 (JB74 ~ 90), GB9112 ~ 9131, HGJ44 ~ 76, SH3406, ANSI B16.5, JIS B2212 ~ 2214, NF E29-211, DIN2543.
3, the structure length: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202.
4, the main test test: JB/T 9092, API 598.