Class 300LB Swing Type Check Valve
A high-performance non-return valve designed for high-pressure industrial pipeline systems, ensuring stable one-way flow control and reliable protection of pumps, compressors, and critical downstream equipment.
- Product Introduction
A high-performance non-return valve designed for high-pressure industrial pipeline systems, ensuring stable one-way flow control and reliable protection of pumps, compressors, and critical downstream equipment.
Key Specifications
| Item | Details |
|---|---|
| Pressure Rating | Class 300LB |
| Size Range | DN50–DN600 (2"–24") |
| Design Standard | API 6D / BS 1868 |
| Testing Standard | API 598 |
| End Connection | RF / RTJ Flanged (ASME B16.5) |
| Face to Face | ASME B16.10 |
| Flow Direction | One-way (non-return) |
| Installation | Horizontal or vertical (upflow) |
| Materials | Carbon steel, stainless steel, alloy steel |
Product Features
Full bore flow design reduces pressure loss and improves system energy efficiency in large-diameter pipeline applications.
Swing disc structure ensures stable opening and closing performance even under fluctuating flow conditions.
Reliable backflow prevention mechanism helps protect pumps, compressors, and downstream equipment from reverse flow damage and water hammer impact.
Self-acting design operates using line pressure without external power, reducing system complexity and failure points.
Designed for Class 300LB pressure service, suitable for medium to high-pressure industrial pipeline systems.
Working Principle
The Class 300LB Swing Type Check Valve operates through a hinged disc that opens when forward flow pressure acts on it. When flow stops or reverses, gravity and backpressure force the disc to return to the seat, creating a tight seal that prevents backflow. This simple mechanical structure ensures fast response and reliable shutoff without external control systems.
Applications
Oil and gas transmission pipelines
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Refinery and petrochemical process systems
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Power plant water and steam circulation systems
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Industrial pumping and compressor discharge lines
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Municipal and industrial water treatment systems
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Quality Control & Testing
Each valve is fully tested before shipment according to API 598 standards.
01
Pressure testing includes both shell strength and seat leakage verification.
02
Material traceability is maintained through EN10204 3.1 certification.
03
Dimensional and visual inspection is performed on every production batch.
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Third-party inspection (such as SGS or BV) is available upon request.
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Materials Of Construction
Carbon steel (WCB) is commonly used for general industrial applications with stable pressure resistance.
Stainless steel (CF8 / CF8M) is available for corrosive or chemically aggressive media.
Alloy steel options are provided for high-temperature or severe service conditions.
Sealing materials can be selected based on application requirements, including metal-to-metal or soft sealing configurations.
Packaging & Delivery
Export-grade plywood cases are used to ensure safe transportation during international shipping.
Flange faces are protected with plastic caps to prevent damage and contamination.
Anti-corrosion oil is applied to critical surfaces before packaging.
Customized packaging and labeling are available for OEM and distributor requirements.
RFQ Information Required
To provide an accurate quotation, please specify size, pressure class, material, quantity, operating medium, and working temperature.
Standard quotation response time is within 12 to 24 hours for typical configurations.
FAQ
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