Forged Steel Gate Valve

CAST VALVE SERIES

 GATE VALVE

 GLOBE VALVE

 CHECK VALVE

 BALL VALVE

 BUTTERFLY VALVE

FORGED VALVE SERIES

 FORGED GATE VALVE

 FORGED GLOBE VALVE

 FORGED CHECK VALVE

INDUSTRIAL STRAINER SERIES

 Y TYPE STRAINER

 BASKET STRAINER

 T TYPE STRAINER

 TEMPORARY STRAINER

 FORGED STRAINER

 STRAINER SCREEN & BASKET

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Forged Steel Gate Valve - API 602, Class 800 to 2500, 1/2 inch to 2 inch

China Industrial Forged Steel Gate Valve Supplier, Exporter, Manufacturer. This is the main page of the API 602 forged steel gate valve series, covering all end connection types (Flanged, SW, BW, NPT), all pressure ratings and all body materials. Forged construction provides higher strength and tighter grain structure than cast valves, ideal for high-pressure small-bore applications up to Class 2500.

Various materials are available in carbon steel, alloy steel, stainless steel and duplex stainless steel: A105(N), LF2, F5, F11, F22, F304(L), F316(L), F51, F53, etc.

End Connections: Flanged (Welded Flange, Integral Flange), SW, BW, NPT.

Sizes: 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2″ (DN15 to DN50).

Pressure Ratings: ANSI Class 150Lb, 300Lb, 600Lb, 800Lb, 900Lb, 1500Lb, 2500Lb.

Forged Steel Gate Valve Application Specifications

• Design and Manufacture: API 602, BS 5352, ASME B16.34

• End Connections: Socket-Weld: ANSI B16.11, Screwed (Threaded): ANSI B1.20.1, Butt-Welding: ANSI B16.25, Flange Ends: ANSI B16.5

• Inspection and Test: API 598

• Structure Feature: Bolted Bonnet (B.B) and Outside Screw and Yoke (OS&Y), Welded Bonnet (W.B) and Outside Screw and Yoke (OS&Y)

• Materials: According to ANSI, ASTM

• Size Range: 1/2 inch to 2 inch (DN15 to DN50)

• Pressure Class: Class 150 to Class 2500

• Temperature Range: -29°C to 425°C (-20°F to 800°F)

✓ Forged construction provides higher strength and tighter grain structure than cast valves for high-pressure small-bore service

Forged Steel Gate Valve Materials List

Material Type	Grade	Typical Application
Carbon Steel	A105, A105N, LF2	General hydrocarbon, steam, water, oil and gas
Alloy Steel	F5, F11, F22	High-temperature steam, power plants, refinery
Stainless Steel	F304, F304L, F316, F316L	Corrosive media, chemical processing, offshore
Duplex Stainless Steel	F51, F53	High-chloride, seawater, sour service

Reference: API 602, BS 5352, ASME B16.34. Materials may vary by model and pressure rating. Contact us for confirmed material certificate.

Pressure Class Comparison

Pressure Class	Design Pressure (bar)	Design Pressure (psi)	Typical Service
Class 800	138	2,000	General hydrocarbon, steam, water, instrument lines
Class 900	153	2,220	High-pressure steam, gas and oil transmission
Class 1500	260	3,750	High-pressure steam, gas injection, wellhead equipment
Class 2500	430	6,250	High-pressure steam generators, natural gas compressor lines

Reference: ASME B16.34. Class 800 is a forged valve-specific rating (approximately between Class 600 and 900). Class 150, 300, 600 available on request for low to medium pressure service.

Forged Steel Gate Valve Applications

• Oil and Gas Industry: Wellhead equipment, Christmas trees, manifold and flowline isolation.

• Power Generation: High-pressure steam isolation, boiler drains, turbine bypass lines.

• Petrochemical: Hydrocarbon processing, catalytic cracking, reformer units.

• Chemical Processing: Corrosive fluid isolation, reagent feed lines, sampling systems.

• Water Treatment: High-pressure pump isolation, desalination, boiler feed water.

• Instrumentation: Instrument root valves, steam trap isolation, sensing line isolation.

FAQ - Forged Steel Gate Valve

Q1: What is the difference between API 602 and API 600 gate valves?

A: API 602 covers forged steel gate valves in sizes 1/2 inch to 2 inch, designed for high-pressure small-bore applications. API 600 covers cast steel gate valves in larger sizes. Forged construction provides higher strength and tighter grain structure, making API 602 valves ideal for compact, high-pressure installations.

Q2: Which end connections are available for forged steel gate valves?

A: We offer Socket-Weld (SW) per ANSI B16.11, Screwed/Threaded (NPT) per ANSI B1.20.1, Butt-Welding (BW) per ANSI B16.25, and Flanged ends per ANSI B16.5 (RF or RTJ). The choice depends on piping specification, pressure class and installation requirements.

Q3: What is the difference between bolted bonnet and welded bonnet design?

A: Bolted bonnet (B.B) allows easy access for maintenance and trim replacement. Welded bonnet (W.B) provides a more compact design and is preferred for high-pressure Class 1500 and 2500 applications where leak-tightness is critical. Both designs feature OS&Y (Outside Screw and Yoke) construction.

Q4: What materials are available for forged steel gate valves?

A: Standard materials include carbon steel (A105, A105N, LF2), alloy steel (F5, F11, F22), stainless steel (F304, F304L, F316, F316L) and duplex stainless steel (F51, F53). Material selection depends on operating temperature, pressure and fluid corrosiveness.

Q5: What is PSB type handwheel forged steel gate valve?

A: PSB (Pressure Seal Bonnet) is a bonnet design where the bonnet is sealed by internal pressure, becoming tighter as pressure increases. PSB type valves are typically used in Class 1500 and 2500 high-pressure applications for superior sealing performance compared to bolted bonnet designs.

Q6: Where can I find detailed dimensions for each pressure class and end connection?

A: Detailed dimensions for each pressure class and end connection are available on our sub-pages. See the Dimension Details section below for Class 800 SW/NPT, 900-1500 SW/NPT, 1500-2500 SW, Pressure Seal 1500-2500 and 150-2500 Flanged/BW pages. Contact us for confirmed drawings.