Wafer Check Valve (D71 / D72 / D76 / D77 Series)
Product Models: D71, D72, D76, D77
Drive Mode: Automatic
Connection Type: Wafer, Flange
Structure Type: Wafer Type
Sealing Type: Metal Seal, Soft Seal
Pressure Range: 1.6–42.0 MPa
Nominal Diameter: DN15–1600
Common Materials: WCB, Stainless Steel, etc.
Design & structural Features:
The D71W Wafer Check Valve is designed with a compact clamped structure, consisting of valve body, disc, stem, and spring.
Thanks to its short disc travel and spring-loaded closing mechanism, the valve effectively reduces water hammer and ensures reliable backflow prevention.
This valve is widely used in power plants, heating, chemical, fertilizer, refinery, metallurgy, paper, pharmaceuticals, brewing, construction, municipal water supply and drainage systems, particularly suitable for space-limited installations due to its short face-to-face length.
It can be mounted horizontally or vertically, providing versatile installation options.
Product Features
Compact and lightweight – small volume, simple structure, easy maintenance.
Dual-disc design – the disc closes quickly under spring force to prevent reverse flow.
Anti-backflow performance – fast closure minimizes water hammer impact.
Short face-to-face length – suitable for installations with limited space.
Versatile installation – safe and reliable for both horizontal and vertical pipelines.
Applications
Clean water pipelines
Industrial wastewater treatment
HVAC and heating systems
Environmental engineering
High-rise building water supply and drainage
General industrial fluid transport
Standards Compliance
Flange connection dimension: GB/T 1724.1-98
Face-to-face dimension: GB/T 12221-1989, ISO 5752-82
Testing standard: GB/T 13927, API 598
