API 600 Gate Valve Manufacturer | Cast Steel Gate Valves Supplier & Factory in China

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API 600 Gate Valve Manufacturer in China. We produce Class 150–2500 cast steel gate valves in WCB, WC6, CF8M & LCC. Factory-direct quotes, API 598 tested.

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Looking for a reliable API 600 Gate Valve Manufacturer? We are a China-based Gate Valve Manufacturer specializing in the design, production, and global supply of API 600 cast steel gate valves for oil refining, petrochemical, power generation, and midstream pipeline applications.

As a certified API 600 Valve Manufacturer, we produce heavy-duty bolted-bonnet wedge gate valves in ASME Class 150 through 2500, fully compliant with API 600, ASME B16.34, and API 598. Every valve is hydro-tested, documented, and shipped directly from our factory.

About Our Factory: Our ISO 9001-certified facility covers 15,000 m² in China and produces over 30,000 industrial valves annually for EPC contractors, energy companies, and valve distributors in 40+ countries. As an established China Gate Valve Manufacturer, we manage casting, machining, assembly, and testing under one roof.

[Factory Tour] [Quality Control]

What Is an API 600 Gate Valve?

An API 600 Gate Valve is a heavy-duty, bolted-bonnet, cast steel wedge gate valve manufactured according to API Standard 600. It is the global benchmark for steel gate valves used in high-pressure, high-temperature petroleum and industrial piping systems.

Compared to general-service gate valves, API 600 requires:

✔ Extra Wall Thickness — Thicker pressure-retaining body walls for corrosion allowance and structural safety.
✔ Heavy-Duty Stem Design — Larger minimum stem diameters to prevent buckling under maximum unseating torque.
✔ API Trim Standards — Standardized trim combinations (Trim 1–18) with hardfaced seating surfaces such as Stellite No. 6.
✔ Strict Testing — 100% shell and seat hydrostatic testing per API 598.

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 | Handwheel / Actuator              |
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 | Yoke & Gland Packing System       |
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 | Bolted Bonnet (ASME B16.34)       |
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 | API 600 Extra-Thickness Cast Body             |
 | [ Inflow ==> Flexible Wedge ==> Outflow ]     |
 | (Stellite Seat Ring)                          |
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Technical Specifications

Parameter	Specification / Standard Compliance
Nominal Size Range	DN50 to DN1200 (2″ to 48″)
Pressure Class Range	ASME Class 150, 300, 600, 900, 1500, 2500
Design Standard	API 600, ASME B16.34, ISO 10434
Face-to-Face Standard	ASME B16.10

[Link to Electric Actuator Gate Valve product page]
[Link to Pneumatic Actuator Gate Valve product page]

Key Features & Structural Benefits

Flexible Wedge Design

The cast wedge features a narrow slot around its perimeter, allowing disk seating faces to adjust independently to seat distortion caused by pipeline thermal stress or pressure variations.

Stellite Hardfaced Seating

Body seat rings are precision-machined, seal-welded to the body, and hardfaced with Cobalt-Base Alloy (Stellite No. 6) to eliminate seat distortion, prevent galling, and extend service life.

Industry Applications

Oil Refining & Petrochemicals: Crude oil distillation units, catalytic cracking, hydroprocessing headers, and storage tank manifolds.
Power Generation Facilities: High-pressure boiler feedwater isolation, main steam header stop valves, and turbine extraction piping.

Case Reference: In 2024, we supplied 48 units of API 600 Class 900 gate valves to a refinery expansion project in the Middle East. [Link to Case Studies]

Frequently Asked Questions (FAQ)

Q1: What is the main difference between API 600 and API 6D gate valves?

API 600 covers heavy-duty wedge gate valves designed primarily for high-pressure, high-temperature industrial piping (refineries and power plants). API 6D covers pipeline valves.