Stainless Steel Flange Swing Check Valve 150 LB 2.5Mpa for OEM

Model No.: H44H

Woking Pressure: 150 LB, 300 LB, 600 LB, 900 LB

Working Temperature: Room temperature

Sealing Material: Hard Alloy

Material: WCB, LCB, WC6, WC9, C5, CF8, CF8M, CF3, CF3M

Structure: Swing type flange check valve

Sealing Method: Hard sealing

Size: DN25 to DN800

In the complex network of industrial fluid transportation and control systems, backflow prevention is a critical safeguard to avoid equipment damage, process disruption, and potential safety hazards. The flange swing check valve, renowned for its simple yet robust design, efficient backflow prevention, and compatibility with diverse working conditions, has emerged as a staple component across numerous industrial sectors. This article delves into the core characteristics of the flange swing check valve, explores its wide-ranging applications in key industries, and highlights its indispensable role in ensuring the stability, safety, and efficiency of fluid systems.

The flange swing check valve is defined by its swing-type disc structure and flange connection, which are the cornerstones of its superior performance. The "flange connection" feature ensures a secure, leak-tight interface with pipelines, making it suitable for large-diameter pipelines (typically DN50 to DN2000) and high-pressure applications (PN10 to PN420), as it can withstand substantial medium pressure without compromising sealing integrity. The valve’s core working principle relies on a hinged swing disc: when fluid flows forward, the pressure pushes the disc open, allowing unobstructed flow with minimal pressure loss; when fluid flow ceases or reverses, the disc swings back to the valve seat under gravity and reverse fluid pressure, instantly forming a tight seal to prevent backflow.

A key advantage of this design is its ability to mitigate water hammer effects. The swing disc’s gradual closing motion (compared to the abrupt closing of some other check valve types) reduces the impact of reverse flow, minimizing pressure surges that can damage pipelines, pumps, and other system components. Additionally, the valve’s internal structure is relatively simple, with fewer moving parts, which enhances its reliability and reduces maintenance requirements. The disc and seat are often fabricated from wear-resistant and corrosion-resistant materials (such as 316L stainless steel, alloy steel, or hard-faced alloys), enabling the valve to adapt to harsh media conditions, including corrosive fluids, high-temperature steam, and fluids containing solid particles.

1.Water Supply and Sewage Treatment Industry

2.Power Generation Industry

3.Petroleum and Petrochemical Industry

4.Chemical Industry

5.Industrial Boiler and HVAC Systems

6.Marine and Shipbuilding Industry

Compared to other types of check valves, the flange swing check valve offers several distinct advantages that make it indispensable in industrial applications. Firstly, its swing disc design provides minimal pressure loss, ensuring efficient fluid flow and reducing energy consumption. Secondly, the gradual closing motion mitigates water hammer effects, protecting system equipment and extending service life. Thirdly, the flange connection ensures secure sealing and easy installation, making it suitable for large-diameter and high-pressure pipelines. Fourthly, its simple structure with fewer moving parts enhances reliability and reduces maintenance costs. Finally, the wide range of material options allows customization to suit diverse media and working conditions, enhancing its versatility across industries.