Forged Steel Check Valve
A forged steel check valve is an automatic valve designed to open and close with the flow of the medium, preventing backflow. Also known as a clack valve, non-return valve, one-way valve, or reflux valve, it safeguards pipelines by stopping reverse flow, preventing pump and motor reversal, and facilitating container discharge. These valves are essential in auxiliary supply pipelines where pressure fluctuations may exceed system pressure.
Types of Forged Steel Check Valves
Forged steel check valves come in two main types:
Swing Check Valves – Operate by rotating around a center of gravity.
Lift Check Valves – Move along the axis to regulate flow.
Forged steel components offer superior strength, impact resistance, plasticity, and toughness compared to cast steel, ensuring durability in demanding applications.
Bonnet Sealing Structures
Forged steel check valves feature three primary cavity seal types:
1. Bolted Bonnet
The valve body and bonnet are secured with bolts and nuts, sealed using spiral wound gaskets (stainless steel wire with flexible graphite). Metal rings are optional for specific requirements.
2. Welded Bonnet
The valve body and bonnet are connected with threads and fully welded, ensuring leak-proof performance.
3. Pressure Self-Tightening Seal
Used in 900 LB, 1500 LB, and 2500 LB valves, where sealing performance improves as internal pressure increases, enhancing reliability.
Operating Mechanism
When fluid flows downstream, the check valve disc opens due to medium pressure. When flow stops, the disc returns to the valve seat by gravity and backflow pressure, preventing reverse flow. The fully sealed structure eliminates external leakage, ensuring long-term performance and reliability.
Bolted Bonnet Check Valves – Reliable Performance for Industrial Applications
Bolted Bonnet Check Valves are essential for preventing backflow in pipelines across industries such as oil and gas, chemical processing, and HVAC systems. Designed for low-pressure applications, these valves feature a bolted bonnet construction that ensures secure sealing and easy maintenance.
For pipeline applications, our check valves are manufactured to API 6D standards, offering full-port, peggable designs that optimize flow efficiency. They are widely used in pump and compressor discharge, steam and condensate lines, chemical feed systems, cooling towers, loading racks, pressure pumps, sump pumps, and injection lines.
Key Features
Designed to Industry Standards
Compliant with BS 1868, ASME B16.34, EN 12516, and API 6D.
Versatile Construction
Available in cast or forged steel for enhanced durability.
Reliable Backflow Prevention
Suitable for critical pipeline applications.
Multiple Valve Types
Swing Check, Tilting Disc, and Piston Check options to suit various needs.
Engineered for efficiency, durability, and seamless operation, our bolted bonnet check valves deliver exceptional performance in diverse industrial environments, ensuring safe and uninterrupted fluid flow.
Pressure seal bonnet check valves offer a superior sealing mechanism compared to traditional bolted bonnet designs. Instead of relying on bolted connections, these valves utilize a pressure-activated sealing system. As internal pressure rises, the bonnet is pressed firmly against the valve body, creating a tighter, more secure seal. This self-sealing feature enhances reliability, especially in high-pressure applications.
These valves are widely used in industries requiring robust performance and protection against reverse flow:
Power Generation: Prevents reverse flow to safeguard turbines, boilers, and critical system components.
Oil and Gas: Ensures secure operation in high-pressure pipelines and processing facilities.
Industrial Process Systems: Protects pumps, instruments, and vital equipment from backflow and pressure surges.
Designed for extreme pressure conditions, pressure seal bonnet check valves deliver long-lasting durability and leak-free performance, making them essential for demanding industrial environments.
A welded bonnet check valve is a robust, leak-proof valve designed for high-pressure and hazardous applications. Unlike bolted connections, its bonnet is securely welded to the valve body, ensuring superior strength and sealing performance. This valve prevents backflow, safeguarding pipelines and equipment from potential accidents. As an automatic valve, it is also referred to as a one-way valve, backflow valve, or isolation valve.
Commonly used as a bottom valve in pumping systems, our welded bonnet forged check valve is built for durability and reliability. Its welded construction eliminates leakage risks, while the combination of check and globe valve functions provides added safety isolation. Designed for easy installation and maintenance, this valve is ideal for demanding industrial environments.
Our products are globally recognized for their exceptional quality and competitive pricing, making them a trusted choice for customers worldwide. Whether for oil and gas, chemical processing, or other critical applications, this valve delivers long-lasting performance under extreme conditions.
Key Features
Leak-proof welded bonnet for maximum durability
Prevents backflow and ensures system safety
Combined check and isolation function for enhanced protection
Easy to install and maintain
Suitable for high-pressure and hazardous environments