Forged Steel Check Valve

Size Range: 1/2″ to 2″ (DN15 to DN50)
Pressure Range: 150~800LB
End Connection: Socket Weld Ends
Material: A105(C), F304(P), F304L(PL), F316(R), F316L(RL)
Seals: Metal-to-Metal Sealing
Valve Design: Swing Type with Bolted Cover
Face to Face: Conforms to ASME B16.10
Testing & Inspection: Per API 598
Suitable Medium: Steam, gas, oil, and other neutral liquids

Product Overview

Forged steel check valve is a high-strength non-return valve designed for high-pressure, high-temperature service. Manufactured from forged carbon or alloy steel, it provides reliable backflow prevention, low leakage, and long service life. Widely used in oil and gas, power generation, petrochemical, and steam systems, forged steel check valves are ideal for ANSI Class 800–2500 applications requiring durability and operational safety.

Product Features

Forged steel body ensures high strength and pressure resistance
Reliable non-return function to prevent backflow
Suitable for high-pressure and high-temperature service (ANSI Class 800–2500)
Low leakage design for safe and stable operation
Long service life with excellent resistance to thermal and pressure cycling
Available in carbon steel and alloy steel for various media
Minimal maintenance, ideal for critical industrial applications

Specification Parameters

• Nominal pressure: 150~800LB
• Strength testing pressure: 1.5×PN
• Seat test: 1.1×PN
• Gas seal test: 0.6 MPa
• Valve main material: A105(C), F304(P), F304L(PL), F316(R), F316L(RL)
• Suitable medium: water, steam, oil products, nitric acid, acetic acid
• Suitable temperature: −29℃ ~ 425℃

Design and manufacturing standards

• Design & Manufacture: API 602, ASME B16.34
• Connection ends dimension as per: ASME B1.20.1 and ASME B16.25
• Inspection and test as per: API 598

Material for Main Parts

MATERIAL NAME	MATERIAL
Body	A105 / A182 F22 / A182 F304 / A182 F316
Disc	A105 / A276 F22 / A276 304 / A182 316
Sealing Surface	Ni-Cr stainless steel or carbon steel surfacing hardfacing carbide
Bonnet	A105 / A276 F22 / A182 F304 / A182 F316

Main External Dimensions and Weight

Pressure Class: Class 150–800

Size (in)	DN (mm)	d	S	D	G	T	L	H
1/2″	15	10.5	22.5	36	1/2″	10	79	64
3/4″	20	13	28.5	41	3/4″	11	92	66
1″	25	17.5	34.5	50	1″	12	111	82
1 1/4″	32	23	43	58	1 1/4″	14	120	92
1 1/2″	40	29	49	66	1 1/2″	15	152	103
2″	50	35	61.1	78	2″	16	172	122

Specification Applications

Oil and gas pipelines for reliable backflow prevention
Power generation systems, including steam and boiler feedwater lines
Petrochemical and chemical processing plants
Refinery process piping under high pressure and temperature
Steam, thermal oil, and high-pressure fluid systems
Critical industrial pipelines requiring safe and durable non-return protection

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