Self-operated differential pressure control valve does not rely on foreign outer energy. The valve compares the pressure variation in pipelines with signal, balancing the pressure of medium and output force of actuator so that can reach to required pressure and differential pressure value. Self-operated differential pressure control valve is mainly used for gas combustion system in industrial furnaces, controlling mixing ratio flow of two fuels to realize ideal combustion conditions. It also can be used for sealing oil system of steam-turbine generator to ensure the safe operation of generator unit and improve generating efficiency.
Parameter
Nominal diameter: DN20-300mm
Nominal pressure: JIS 10K, 20K
Face to face: bellows
Materials
Body |
HT200, ZG230-450, ZG1Cr18Ni9Ti , ZG1Cr18Ni12MoTi |
Core |
1Cr18Ni12Mo2Ti, 1Cr18Ni9Ti |
Seat |
1Cr18Ni12Mo2Ti, 1Cr18Ni9Ti |
Spring |
60Si12Mn, 1Cr18Ni9Ti, 50CrVA |
Bellows |
1Cr18Ni9Ti |
Diaphragm |
Rubber |