A Complete Guide to API 602 Forged Gate Valves

In industries where high-pressure, high-temperature, and corrosion-resistant valves are essential, the API 602 forged gate valve is a reliable choice. These valves are widely used in oil and gas, petrochemical, power generation, and industrial processing plants due to their robust construction and ability to provide a tight shut-off in critical applications.  

What Is an API 602 Forged Gate Valve?  

An API 602 forged gate valve is a small-bore valve designed according to the API 602 standard, which defines the requirements for forged steel valves in sizes typically ranging from ½ inch to 2 inches. These valves are manufactured using forged materials, making them more durable and resistant to extreme operating conditions.  

They feature a rising stem with a non-rising handwheel and are primarily used for applications requiring on/off flow control rather than throttling. The gate inside the valve moves perpendicular to the flow to either block or allow passage, ensuring minimal pressure drop when fully open.  

Key Features and Benefits  

- Compact and Durable Design – Made from high-strength forged steel for better performance in high-pressure environments.  

- Superior Sealing Performance – Provides bubble-tight shut-off, minimizing leakage risks.  

- High-Temperature and Pressure Resistance – Ideal for extreme conditions in industries like oil refineries and chemical plants.  

- Extended Service Life – Forged construction enhances strength and durability compared to cast steel valves.  

- Low Pressure Drop – When fully open, the gate valve allows fluid to flow smoothly with minimal resistance.  

Common Applications of API 602 Forged Gate Valves  

- Oil and Gas Industry – Used in pipelines and processing facilities for controlling the flow of crude oil, natural gas, and refined products.  

- Petrochemical and Chemical Plants – Ensures safe and reliable shut-off in processes involving corrosive chemicals.  

- Power Generation – Applied in steam, water, and fuel handling systems in thermal and nuclear power plants.  

- High-Pressure Industrial Systems – Essential in boilers, heat exchangers, and pressure vessels.  

Types of API 602 Forged Gate Valves  

- Bolted Bonnet Gate Valve – Offers a secure bolted connection for easy maintenance and assembly.  

- Welded Bonnet Gate Valve – Provides a leak-proof design, ideal for high-pressure and high-temperature environments.  

- Pressure Seal Gate Valve – Designed for extreme pressure applications, ensuring tight sealing under high loads.  

Key Considerations When Choosing an API 602 Forged Gate Valve  

- Material Selection – Available in carbon steel, stainless steel, alloy steel, and duplex stainless steel, depending on corrosion and temperature requirements.  

- End Connections – Choose between socket weld, threaded, or butt-weld connections based on pipeline specifications.  

- Class Rating – Ensure the valve meets ANSI pressure classes (150, 300, 600, 900, 1500, or 2500) for compatibility with the system.  

- Operation Method – Available in manual handwheel, gear-operated, or actuated versions for automation needs.  

The API 602 forged gate valve is a crucial component in high-pressure and high-temperature industrial applications. With its rugged design, excellent sealing properties, and long service life, it ensures reliable flow control in demanding environments.