Pneumatic symbol of flange type pneumatic butterfly valve. Is port 2 open or closed? Flexible expansion valve is designed for pipeline system to absorb pipeline movement, reduce stress, reduce system noise/vibration, compensate misalignment/offset, and protect rotating machinery from starting impact.
Materials for making Dongfeng single ball valve
1. (Outer and inner layers): EPDM NBR and neoprene
2. Reinforcing layer: nylon fabric and
3. Wire material: stainless steel wire
4. Flange material: carbon steel, stainless steel and ductile iron
