Pneumatic hard seal butterfly valve is composed of pneumatic actuator and butterfly valve. It adopts three-dimensional eccentric principle design, multi-level sealing structure, high temperature resistance, high pressure resistance, corrosion resistance, wear resistance, so that the butterfly valve in the operation of the sealing performance is excellent and reliable, can achieve a gas seal no leakage, is a long-life energy-saving butterfly valve products. It has double functions of cutting off and regulating; widely used in metallurgy, chemical industry, petroleum, thermal power, energy, light industry and other fields. According to different needs, we can provide a variety of actuator forms to choose from.

Nominal diameter: DN50~800mm

Connection: Falnge, clampe type

Actuator configuration: AT、GT、AW type

Cylinder form: Double action, single action (spring reset) 

Control mode: Switching type, regulating type, thee-stage type (optional opening)

Nominal pressure: 16、25、40 bar (please specify if higher pressure needed when ordering)

Gas source pressure: 4~7bar

Medium temperature: W1:-40~180℃、W3：-30~425℃、W4：-40~425℃

Ambient temperature Standard: -20~80℃

Valve body material: Carbon steel (C), Stainless steel (P4, P6)

Seal material: polytetrafluoroethylene ( F ), metal hard seal ( H ), hard alloy ( Y )