Product name:Pneumatic vacuum butterfly valve
Nominal Diameter：50～600mm
Suitable Temperature: -25 ～ + 80 ℃ (sealing material of butyl rubber) -30 ～+ 150 ℃ (sealing material for fluorine rubber)
Suitable for:≤1.3×10-6
Gas leakage rate:2×105～1.3×10-5
The main materials:stainless steel
