API Gate Valve

API Gate Valve Manufacturer

Solid manufactures and supplies API gate valves for on-off isolation in oil and gas, petrochemical, power generation and industrial pipeline systems. Available in sizes from 1/2 to 48 inches and ASME pressure classes from 150 to 1500, our valves can be configured with carbon steel, stainless steel, low-temperature steel or alloy steel bodies to match different operating conditions.

Each API Gate Valve can be produced according to the required design standard, body material, trim, pressure class, end connection and testing scope. Send us your valve data sheet or project specifications to receive a suitable configuration and quotation.

API Gate Valve Specifications

Design and Testing Standards

Design and Manufacture: Cast steel gate vlave to API 600 gate valve(ISO 10434) or API 6D, cast stainless steel gate valve to API 603 gate valve or API 600 gate valve; Forged steel gate valve to API 602 gate valve

The required standard edition, leakage acceptance criteria and inspection scope should be stated in your purchase specification. Requirements such as third-party inspection, additional NDE or special project documentation should be confirmed before production.

API Gate Valve Design Features

Flexible Wedge for Reliable Isolation

The flexible wedge used in NPS 2 and larger valves can accommodate minor changes in seat alignment caused by pipeline temperature and operating conditions. This helps reduce the possibility of wedge binding while maintaining reliable shutoff performance.

OS&Y Rising Stem Construction

The outside screw and yoke structure keeps the stem threads away from the process medium. The rising stem also provides a visible indication of the valve position, making operation and inspection more convenient.

Bolted Bonnet Design

The bolted bonnet provides access to internal components during inspection and maintenance. Packing, gasket and bolting materials can be selected according to the system pressure, operating temperature and process medium.

Flanged and Butt-Weld Connections

Flanged API gate valves simplify installation, removal and scheduled maintenance. Butt-weld ends are suitable for projects that require permanent pipeline connections and fewer potential leakage points.

API 600 Gate Valve vs API 602 Gate Valve vs API 603 Gate Valve

API 600 gate valve, API 602 gate valve and API 603 gate valves are designed for different size ranges, materials and service conditions. Selecting the correct standard depends on the pipeline size, body material, operating medium, pressure-temperature conditions and project specifications rather than pressure class alone.

When Should You Choose an API 600 Gate Valve?

Choose an API 600 gate valve when your project requires a heavy-duty steel valve for refinery, petrochemical, power generation or other demanding process applications. It is normally the most appropriate option for medium- and large-bore pipelines requiring flanged or butt-weld connections, substantial body wall thickness and reliable isolation under elevated pressure or temperature.

When Should You Choose an API 602 Gate Valve?

Choose an API 602 gate valve for compact, small-bore piping of DN100 / NPS 4 and below. Its forged steel construction is commonly specified for high-pressure utility lines, drains, vents, bypass lines and process equipment connections where installation space is limited. API 602 should not be treated as a direct replacement for a larger API 600 cast steel gate valve.

When Should You Choose an API 603 Gate Valve?

Choose an API 603 gate valve when corrosion resistance is the main requirement and the project specifies stainless steel or another corrosion-resistant alloy. It is often used in chemical processing and other corrosive services where an API 600 heavy-duty body pattern is unnecessary. Material compatibility with the fluid must still be verified before selection.

Applications of API Gate Valves

An API Gate Valve is primarily used as a fully open or fully closed isolation valve. Typical applications include:

• Oil and gas processing facilities

• Petroleum refineries

• Petrochemical and chemical processing plants

• Power generation and steam systems

• Industrial water and utility pipelines

• High-pressure process piping

• Metallurgical and environmental engineering systems

Gate valves are not normally recommended for continuous throttling. Operating the valve in a partially open position can cause turbulence, vibration and accelerated wear on the gate and seating surfaces.

API 600 vs API 6D Gate Valves

API 600 generally applies to heavy-duty bolted bonnet steel gate valves used in refinery and process piping. These valves typically use a wedge gate and are available with flanged or butt-weld ends.

API 6D applies to valves used in petroleum and natural gas pipeline systems. API 6D projects may require through-conduit construction, piggability, bidirectional sealing or other pipeline-specific functions. If your project specifies API 6D, provide the complete pipeline requirements so the appropriate valve design can be evaluated separately.

Custom API Gate Valve Options

As an API Gate Valve supplier, Solid can review project-specific requirements covering:

• Valve size and pressure class

• Body, bonnet, wedge, stem and trim materials

• Flanged or butt-weld end connections

• Gearbox, electric or pneumatic actuation

• Packing, gasket and bolting materials

• Coating, marking, tagging and export packing

• Material certificates and dimensional drawings

• Pressure test reports and inspection documents

• Third-party inspection and additional testing

You can also view our complete range of cast steel valves or compare them with API ball valves for different shutoff requirements.

API Gate Valve FAQs

What sizes and pressure classes are available?

Solid supplies valves from 1/2 to 48 inches in ASME Classes 150, 300, 600, 900 and 1500. Availability depends on the selected body material, connection type and project specification.

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

API 600 mainly covers heavy-duty bolted bonnet steel gate valves with flanged or butt-weld ends. API 602 covers compact steel gate, globe and check valves in smaller sizes. They should be treated as separate product specifications.

Can stainless steel and alloy steel bodies be supplied?

Yes. Available materials include WCB, LCB, CF8, CF8M, CF3, CF3M, WC6 and WC9. The final material must be selected according to the process medium, pressure, temperature and corrosion conditions.

How are the valves inspected and tested?

Inspection and pressure testing can be performed according to API 598 and the agreed purchase specification. Additional NDE, leakage criteria or third-party inspection should be specified in the RFQ.

Can API gate valves be used for flow control?

Gate valves are designed mainly for isolation and should normally operate fully open or fully closed. For frequent flow regulation, a globe valve or another control-oriented valve is generally more suitable.

API Gate Valve

Ready to specify or procure API-compliant gate valves for your project? 

Contact our engineering team today with your size, pressure class, and material requirements. We’ll confirm design to API 600 gate valve ，API 602 gate valve or API 603 gate valve, provide dimensional data to ASME B16.10/B16.5/B16.25, and return a fast quotation with lead time and inspection plan per API 598.