Power Station Check Valve High Temperature High Pressure Forged Steel Class 1500 2500 for Thermal Power Plant China Manufacturer

Power Station Check Valve

Essence: An anti backflow valve designed specifically for high voltage and high temperature working conditions in power systems, used in key parts such as boiler feedwater and steam pipelines to prevent the backflow of media (such as water and steam) and ensure the safe operation of the unit.

Core features:

High pressure and high temperature resistance: The valve body is made of alloy steel or stainless steel material, which can withstand high pressure (up to 42MPa) and high temperature (up to 600 ℃), and has strong stability;

Reliable sealing: Metal hard seal or elastic seal structure, suitable for frequent start stop and pressure fluctuations, with a leakage level of ANSI VI;

Anti impact design: Spring assisted rapid closure reduces water hammer effects, and the valve disc guiding structure enhances vibration resistance;

Strong adaptability: mainly flange connection, suitable for large-diameter pipelines (DN50~DN1200), and valve discs or seals can be replaced online during maintenance.

Typical applications: boiler circulation systems in thermal power plants, main steam pipelines in nuclear power plants, steam turbine reheating systems, etc.

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Long lifespan and low maintenance cost
Large caliber and adaptive design
Anti impact and anti vibration performance
High reliability sealing design
High pressure and high temperature tolerance

Long lifespan and low maintenance cost

Long lifespan and low maintenance cost
01
The castings undergo stress relief treatment to eliminate internal defects, and the design life can reach more than 20 years.
02
Standardized components such as sealing rings and springs have interchangeability, reducing spare parts inventory and maintenance costs.

Large caliber and adaptive design

Large caliber and adaptive design
01
Mainly flange connection, suitable for DN50~DN1200 pipeline diameter, meeting the high flow requirements of power plant main steam, water supply system, etc.
02
The modular structure supports online maintenance (such as replacing valve discs or seals) without the need to disassemble the valve body, reducing downtime.

Anti impact and anti vibration performance

Anti impact and anti vibration performance
01
Spring energy storage device or hydraulic damping structure can shorten the closing time and effectively reduce water hammer impact force (can reduce peak pressure by more than 80%).
02
The valve disc and guide shaft are made of low friction coefficient materials (such as graphite copper sleeve) to enhance vibration resistance and avoid misoperation.

High reliability sealing design

High reliability sealing design
01
Adopting metal hard sealing (such as Stellite alloy) or elastic sealing structure, the sealing surface is wear-resistant and erosion resistant, with a leakage level of ANSI VI, suitable for frequent start stop and pressure fluctuations.
02
The guiding shaft and spring assisted closing mechanism ensure fast and precise resetting of the valve disc, reducing the risk of medium backflow.

High pressure and high temperature tolerance

High pressure and high temperature tolerance
01
The valve body is made of alloy steel or stainless steel material, combined with precision casting technology, and can withstand high pressure above 42MPa and high temperature of 600 ℃, suitable for extreme working conditions such as power plant boilers and steam pipelines.
02
Key components such as valve discs and sealing surfaces are strengthened by heat treatment or hard alloy welding, with excellent creep resistance and thermal fatigue performance, and high long-term operational stability.

Main Component Materials

Valve body	Valve cover	Valve disc	Valve seat
WCB	WCB	25Stellite 12	25+D507Mo
Wc6	WC6	WC9+Stellite 12	WC6+Stellite 6

Performance Specifications & Dimensions

Nominal Pressure PN

10.0/20.0/32.0
Shell F

Px1.5
Sealing Pressure

Px1.1
Medium

Water, steam
Temperature (℃)

≤425、≤570

Model	Nomina Pressure PN(MPa)	Nomina Diameter DN(mm)	L	D1	D2	Reference value (mm)
Model	Nomina Pressure PN(MPa)	Nomina Diameter DN(mm)	L	D1	D2	H	Do
H61Y-200	20	100	600	113	138	330	290
H61Y-320	32	125	900	153	159	400	440
H61Y-200	20	175	900	187	222	426	400
H61Y-200	20	225	1000	233	273	510	520

Nominal Pressure PN(MPa)	Nominal Diameter DN(mm)	L	D	D1	D2	D6	f	f1	b	Reference value (mm)
Nominal Pressure PN(MPa)	Nominal Diameter DN(mm)	L	D	D1	D2	D6	f	f1	b	H	Do
10.0	50	300	195	145	115	88	3	4	28	198	185
10.0	80	380	230	180	150	121	3	4	34	234	255
10.0	100	450	265	210	175	150	3	4.5	28	234	255
10.0	125	550	350	290	250	204	3	4.5	46	355	340

Note: The pressure range is 10.0MPa~32.0MPa. The above data is for reference only. Please consult the company's sales department for details.

Valve Application

Oil & Gas Transportation

Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.
Chemical Raw Material Control

The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.
High Temperature SteamPipeline in Power System

High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.
Other Industries

Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.