Wafer Type Single Disc Check Valve

Product Advantages

● Compact & Lightweight: Saves space and reduces installation cost.
● Wide Pressure Compatibility: PN10, PN16, PN25, and Class150 available.
● Low Maintenance: Simple structure with durable hinge mechanism.
● Energy Efficient: Lower head loss than traditional swing check valves.
● Suitable for Various Media: Water, air, steam, oil, and general industrial fluids.

Size Range

● NPS 1″ – 16″
● DN25 – DN400

Pressure Rating

● PN10 / PN16 / PN25
● Class 150

Standards

● Design Standard: API 594 / EN 12032
● Test Standard: API 598 / EN 12266
● Flange Compatibility: EN 1092-1 / ASME B16.5

Industry Applications

● Water supply & distribution networks
● HVAC heating & cooling systems
● Pump discharge and booster systems
● Fire protection pipelines
● Industrial process fluid lines
● Air, oil, and general purpose pipelines

FAQs

1. What is a wafer type single disc check valve?

A wafer type single disc check valve is a compact valve installed between pipeline flanges to prevent reverse flow. Its single disc design provides fast closing response and low pressure loss for industrial piping systems.

2. What is the difference between a wafer check valve and a flanged check valve?

A wafer check valve is installed between two flanges and has a shorter face-to-face dimension, making it lighter and more space-saving than traditional flanged check valves.

3. What’s the practical difference between a single disc and a dual plate wafer check valve?
A single disc design uses one swinging or spring-loaded disc and is simpler and cheaper for lower flow-velocity lines; a dual plate design splits into two smaller plates that close faster and reduce water hammer, which matters more in high-velocity or frequently cycling systems. See our Wafer Type Dual Plate Check Valve if your line runs closer to that end of the spectrum.

4. Does a wafer check valve need a minimum flow velocity to seal properly?
Yes — the disc relies on flow force (and spring assist, in spring-loaded designs) to open and close fully. In very low-flow or intermittent systems, an undersized or unassisted disc may not seat cleanly, so velocity should be checked against the manufacturer’s Cv data during sizing.

5. How long does a check valve seat typically last before it needs replacement?
Seat life depends heavily on media cleanliness and cycling frequency rather than a fixed timeframe — abrasive particles or frequent partial-flow throttling accelerate wear well before a valve’s rated pressure cycles are reached. Our guide on valve seat damage causes and prevention covers the common failure patterns.

6. Is a wafer check valve interchangeable across different flange standards without an adapter?
Not automatically — wafer valves are held in place by clamping pressure between two flanges, so both the bolt pattern and face-to-face dimension need to match the flange standard (e.g., EN 1092 vs ASME B16.5) on both sides of the line.