Valve Brand: SUFA | Aiqu Brand H
Premium power station valves: motorized gate valves for main steam systems / HP exhaust non-return valves / hydraulic HP heater three-way valves / pneumatic control valves / pneumatic Y-pattern drain valves
HP heater emergency drain control valves / LP turbine exhaust butterfly valves / boiler superheater spray water control valves / extraction steam check valves
Forged steel gate valves for power station & conventional island main steam systems
Forged steel gate valves for the main steam systems of power stations and nuclear conventional islands are used in thermal power boiler main steam systems. During boiler start-up, when steam quality does not yet meet turbine admission requirements, the main steam warm-up gate valve opens to warm the main steam piping, and the steam is discharged through this valve; during normal boiler operation, the warm-up gate valve closes and steam is admitted to the turbine to generate power.
Product Specifications
Size range: DN100-DN1000
Pressure class: CLASS900-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: butt weld
Operation: electric
Forged steel gate valves for power station & conventional island main feedwater systems
Forged steel gate valves for the main feedwater systems of power stations and nuclear conventional islands are used in thermal power boiler main feedwater systems for opening and closing the main feedwater line.
Product Specifications
Size range: DN100-DN1000
Pressure class: CLASS900-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: butt weld
Operation: electric
Hydraulic HP Heater Three-Way Valve
During normal operation of the high-pressure heater, the inlet/outlet three-way valve is in the main-line-open, bypass-closed position, and feedwater enters the heater through the main line. When the high-pressure heater fails and requires maintenance, driven by the feedwater, the valve disc of the inlet/outlet three-way valve moves downward under the differential pressure of the upper and lower chambers of the hydraulic cylinder, closing the main line and opening the bypass within 5 seconds so that feedwater enters the boiler through the bypass.
Product Specifications
Size range: DN100-DN1000
Pressure class: CLASS900-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: butt weld
Operation: hydraulic (medium: feedwater)
Pneumatic Y-Pattern Drain Valve for Power Station & Conventional Island
Pneumatic Y-pattern drain valves for power stations and nuclear conventional islands are used in thermal power plants for steam piping drains. The drain valve is closed during normal boiler operation; after boiler shutdown, it is used to discharge two-phase steam and saturated or condensate water from the drain line.
Product Specifications
Size range: DN50-DN200
Pressure class: CLASS600-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: butt weld
Operation: pneumatic actuator
LP Turbine Exhaust Butterfly Valve
The LP turbine exhaust butterfly valve is installed in the piping between the boiler feedwater pump drive turbine outlet and the condenser inlet, mainly serving to exhaust steam. When the LP turbine needs to be shut down or overhauled, the exhaust butterfly valve closes, isolating the LP turbine and maintaining the condenser vacuum.
Product Specifications
Size range: DN50-DN2800
Pressure class: 0.6MPa~2.5MPa
Design standard: ASME B16.34
Body material: carbon steel
End connection: flanged
Operation: electric
Extraction Steam Check Valve for Power Station & Conventional Island
The extraction steam check valve is used for emergency non-return duty on turbine extraction lines, also known as a fast-closing check valve or quick-closing valve. In the event of sudden turbine pressure loss, it closes rapidly within 0.5~1 second, preventing steam and condensate in the piping from flowing back and damaging the turbine.
Product Specifications
Size range: DN100-DN600
Pressure class: CLASS900-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: flanged
Operation: electric
HP Exhaust Non-Return Valve
The HP exhaust non-return valve is of swing check valve construction and normally operates automatically: under fluid pressure in one direction the disc opens; when the fluid flows backward, the disc closes. To achieve forced fast opening and closing, the valve is additionally equipped with two pneumatic actuators.
Product Specifications
Size range: DN100-DN1000
Pressure class: CLASS900-CLASS4500
Design standard: ASME B16.34
Body material: alloy steel
End connection: flanged
Operation: electric
HP Heater Emergency Drain Control Valve
The HP heater emergency drain control valve is used for emergency draining of the high-pressure heater in fault conditions, playing a critical role in the normal operation of the unit.
Product Specifications
Size range: DN100-DN300
Pressure class: CLASS150-CLASS600
Design standard: ASME B16.34
Body material: carbon steel
End connection: butt weld
Operation: pneumatic