Application: Applied to natural gas, petroleum, chemical , environmental protection, city pipeline, the gas conveying pipeline, steam vent system and storage device on flat gate valve accessories.
1.304 Flat Gate Valve Stem from 2″ to 48″,flat valve with flexible wedge, elastomeric closure and external screw suitable even for regulation, manufactured according API standard.
2.For a valve of the Rising Stem type, the stem will rise above the handwheel if the valve is opened. This happens, because the stem is threaded and mated with the bushing threads of a Yoke. A Yoke is an integral part from a Rising Stem valve and is mounted to the Bonnet.
3.For a valve of the non Rising Stem type, there is no upward stem movement if the valve is opened. The stem is threaded into the disk. As the handwheel on the stem is rotated, the disk travels up or down the stem on the threads while the stem remains vertically stationary.
Material:410、420、F304、F316 and other special steel.
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