2020 China New Design Self-Operated Safety Shut-Off Valve - Hydraulic three-way valve for water supply of high-pressure heater – Convista

Detail

During normal operation of high-pressure heater of 600 to 1,000MW supercritical (ultra-supercritical) thermal power unit, the main route of the three-way valve at high pressure heater inlet is opened and the bypass is closed. Water supply of the boiler enters the high-pressure heater from the main route before entering the boiler through the three-way valve at high pressure heater outlet.

Advantages

1. The valve body and bonnet adopt fully forged steel structure.
2. Sealing type of the valve body and bonnet adopts pressure self-sealing structure.
3. Top of the valve bonnet has water injection and drainage holes and the piston is built in the valve bonnet.
4. Sealing surfaces of the valve seat and disc adopt Stellite No. 6 alloy spray welding.
5. The bypass sealing adopts the sealing structure integrating modified PTFE elastic energy storage ring and perfluoro O-ring.
6. The throttle elements in inlet three-way valve bypass and the upper valve seat adopt integrated design and require no additional throttle orifice separately.