根据API 600、API 602、GB/T 12234的要求,闸阀是工业管道产品中使用最多的截止阀。适用于各类工业管道150~2500级。闸阀具有以下优点。
- Big flow area, small fluid resistance;
- Simple construction, easy operation;
- A seat seal ring is replaceable welding or threaded seat;
- Seal surface can be surfacing 13 Cr, satellite, monel metal, etc, stand wear and tear and abrasion resistance;
- Low-pressure valve uses the bolted bonnet; the high-pressure gate valve uses the pressure seal bonnet;
- Small sizes gate valve with forged shell, big sizes gate valve with casting shell;
- The operation of the gate valve includes electric, pneumatic, hydraulic, spur gear and Bevel gearbox, handwheel.