Quick closing butterfly valve

Application

Quick closing butterfly valve is designed to prevent back flow of steam & condensate into turbine in the event of trip or load rejection. It could shut off pipeline reliably within 0.5 second.

Specification

Standard: JB/T 11490、ASME B16.34
Size: DN80~DN3000
Pressure: PN10~PN160
Temperature: soft seal, ≤80℃. Hard seal, ≤425℃.
Connection: flange, butt weld

Material

Body: cast iron, CS, SS
Disc: cast iron, CS, SS
Seat: SS
Stem: SS
Sealing ring: rubber, graphite, metal
Bush: self-lubricating material, SS, copper alloy.

Features

• Reliable quick closing within 0.5s for emergency shutoff.
• Flexible open & close. Zero leakage.
• No slamming on valve seat.
• Optional driving: spring, accumulator.
• Triple eccentric design. Less wearing, low friction, low driving force.