ASTM B148 C95800 Axial Check Valve, API 6D, 4 IN, CL150, RF

Product Name: ASTM B148 C95800 Axial Check Valve
Type: Axial Flow Check Valve
Design Standard: API 6D, ASME B16.34
Body Material: ASTM B148 C95800
Size: 4 Inch, DN100
Pressure: Class 150 LB, PN20
End Connection: RF

In addition to the general function of a check valve, the axial flow check valve offers significant advantages, including reduced noise and lower impact due to the use of a spring mechanism. Its axial flow design ensures minimal fluid resistance, high flow capacity, and a compact structure, making it an excellent choice for installation at pump outlets in oil and gas pipeline systems.
This valve is specifically designed for non-return applications in pipelines transporting oil, gas, water, and other fluids, ensuring reliable backflow prevention while optimizing system efficiency.

Technical Specifications

» Nominal Diameter: NPS 2-36 Inch (DN50-DN900)
» Design Pressure: Class 150-2500 LB (PN10-PN420)
» Materials: ASTM A216 WCB, WCC, A217 WC6, WC9, C5, C12A, A352 LCB, LCC, A351 CF8, CF8M, CF3, CF3M, CF8C
» Design and Manufacture: GB/T 21387, API 6D, ASME B16.34
» Face to Face (End to End): GB/T 12221, ANSI B16.10, API 6D
» Flanged Connection: GB/T 9113, ASME B16.5
» Test and Inspection: GB/T 26480, API 598
» End Connections: Flanged (FF, RF, RTJ) to international standards
» Temperature Range: -29°C to 595°C
» Medium: Water, gas, oil, etc.

Product Features

» Compact and Durable Design – One-piece body construction ensures lightweight, high strength, and easy maintenance.
» Spring-Assisted Closure – The thrust force of the spring keeps the valve closed even in the absence of medium pressure.
» Versatile Installation – A well-designed sealing carrier allows installation in any direction while ensuring a perfect seal between the disc and seat.
» Efficient Flow Performance – The axial flow structure and precision-engineered flow passage minimize pressure loss, stabilize medium flow, and prevent cavitation erosion. The disc returns to the sealing position due to the spring force and sub-pressure, eliminating direct impact from the medium and ensuring low-noise operation.
» Enhanced Reliability – Special disc carrier and pin surface treatment prevent sticking, allowing smooth opening and closing. This design eliminates common issues where the disc fails to stay centered in the sealing position due to gravity.
» Consistent Sealing Under Low Pressure – The accurately designed spring force slightly exceeds the combined force of disc gravity and friction with the sealing ring, ensuring reliable closure under low pressure and in any installation position, thus protecting pump operation.