Swing Check Valve Flange Type
Overview
Our Swing Check Valve Flange Type is engineered for municipal water, wastewater, and sewage pumping systems. Featuring a heavy-duty ductile iron body and a fully EPDM-encapsulated disc, it ensures a reliable non-return function, minimizing water hammer (hydraulic shock) and protecting downstream pumps from damage.
Product Parameter
| Parameter | Specification Details |
| Product Name | Swing Check Valve Flange Type |
| Main Material | Ductile Iron (GGG40/50 or ASTM A536) |
| Working Temperature | 0℃ to 80℃(32℉ to 176℉ ) |
| Size | 2" to 12" (DN50 to DN300) |
| Pressure Rating | 1.0Mpa/1.6Mpa/2.5Mpa |
| Working Medium | Water/Sewage |
| Color | Blue/Red |
| Applications | Used both vertically and horizontally;Used in one-way flow pipeline to prevent the water from back flow |
| Body | Ductile Iron,QT450-10 |
| Hinge Pin / Shaft | Stainless Steel 304 |
| Disc | Ductile Iron covered by EPDM |
| Seal | NBR |
| Bolt | Stainless Steel 304 |
Key Features
EPDM-encapsulated disc provides reliable sealing performance against the precision-machined seat, helping reduce the risk of backflow leakage.
The swing disc moves away from the main flow path during operation, reducing turbulence and minimizing pressure loss.
Internal hinge pin and key connection components are manufactured from SS304 stainless steel for enhanced corrosion resistance and long-term operational reliability.
Internal and external fusion-bonded epoxy (FBE) coating helps protect the valve body from corrosion and extends service life in water and wastewater applications.
Suitable for horizontal installation and vertical pipelines with upward flow direction.
Typical Applications
Our flanged swing check valves are widely deployed globally across various critical infrastructures:
Water Supply Networks
Municipal drinking water distribution and high-rise building booster pump stations.
Wastewater Treatment
Sewage lifting stations, treatment plants, and industrial effluent drainage.
HVAC & Cooling Systems
Industrial circulating cooling water loops.
Fire Protection
Commercial and industrial fire pump house pipelines.
Manufacturing Quality & Traceability
Hydrostatic Testing
Every single valve undergoes individual hydrostatic shell and seat pressure testing according to ISO 5208 / EN 12266-1 before final approval. We tolerate zero leakage.
Raw Material Traceability
Mill Test Certificates (MTC) conforming to EN 10204 3.1 are provided with every batch, cross-referenced with the unique casted heat numbers on the valve bodies.
Coating Integrity Verification
FBE coating thickness is strictly verified via electronic holiday detectors and digital gauges to ensure continuous adhesion and thickness (>250μm), preventing long-term blistering.
Packing & Logistics
Flange Face Protection: Heavy-duty plastic covers are securely fitted onto both flange ends to protect the raised faces and sealing surfaces during handling and transit.
Sea & Air-Worthy Packing: Valves are packed in robust, export-standard plywood cases (free of fumigation) and internally wrapped with moisture-proof, anti-scratch VCI plastic film.
FAQ
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