1. Compact structure, reasonable design, good valve rigidity, smooth passage and small flow coefficient.

2. The sealing surface is made of stainless steel and hard alloy, with long service life.

3. Flexible graphite packing, reliable sealing, easy and flexible operation.

4. The driving mode is manual, pneumatic, electric and gear transmission.

5. The structure type is elastic wedge single ram, rigid wedge single ram double ram.