Product Features:

This special quick-closing valve protects steam turbine generators. It prevents reverse flow of steam into the turbine during sudden load drops, which It prevents reverse flow of steam into the turbine during sudden load drops, which could cause the turbine blades to rotate backward at high speed, potentially damaging the turbine. It also prevents water from leaking into the turbine from the heater system, avoiding water hammer accidents. The valve can close rapidly within 0.5 seconds in such situations.

Structure features:

1, pneumatic check valve is through the compressed air to push the piston in the cylinder, the piston pushes the fork, the fork and then drive the rocker shaft rotation to open the valve, through the solenoid valve to cut off the air supply with the spring will push the piston back to close the valve.

2, valve flap, valve seat sealing surface using the latest surfacing materials, the sealing surface wear-resistant, anti-scratch performance.

3、Using high performance new type packing, reliable sealing, light and flexible operation.

• Product standard: JB/T 3595, NB/T 47044, ASME E16.34.
• Nominal pressure: PN16-PN420(150LB-2500LB)
• Nominal diameter: DN50-DN500(2″-20″)

Main body material:

1、WCB

2、ZG20CrMo、ZG15Cr1Mo1V

3、ASTM A216 WCB

4、ASTM A217 WC6、ASTM A217 Wc9

• Using temperature: -29℃-570℃.
• Applicable medium: water, steam, etc.
• Connection: flange, welding
• Transmission mode: pneumatic, hydraulic