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Overview
The Wafer Type Dual Plate Check Valve is a compact non-return valve designed to prevent reverse flow in piping systems.
It features two independent valve plates supported by torsion springs, allowing the plates to close rapidly and automatically when flow stops, effectively eliminating backflow and reducing water hammer.
With its wafer-type design, the valve can be installed between flanges in both horizontal and vertical pipelines, offering space-saving installation and reliable performance across a wide range of applications.
Product Description
This dual plate check valve is manufactured in accordance with API 594, featuring a short face-to-face dimension, lightweight construction, and excellent structural rigidity.
The valve plates open smoothly under forward flow and close instantly under reverse pressure with the assistance of torsion springs.
Compared with swing check valves, the dual plate design provides faster response, lower pressure loss, and greater operational stability, making it suitable for high-performance pipeline systems.
Technical Specifications
| Valve Type: | Dual Plate Wafer Check Valve |
| Size Range: | DN40 – DN1200 |
| Pressure Rating: | PN10, PN16 |
| Design Standard: | API 594 |
| Face to Face: | ANSI B16.10, EN 558-1 Series 16 |
| Inspection & Testing: | API 598, GB/T 13927 |
| Flange Connection: | ANSI Class 125 / 150, DIN PN10 / PN16, EN 1092, JIS 10K, AS 2129 |
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The wafer type dual plate check valve is widely used in:
Water supply and distribution systems
HVAC and chilled water systems
Fire protection pipelines
Oil and gas transmission lines
Industrial process pipelines
Chemical and power plant systems
Applicable media:
Water, air, steam, oil, and compatible industrial fluids.
Forward flow:
Fluid pressure pushes both valve plates open against the torsion springs, allowing smooth flow through the valve.
Reverse flow or flow stop:
The torsion springs force the plates to close rapidly and simultaneously, sealing the valve and preventing backflow and pressure shock.
e coated with environmentally friendly anti-corrosion coating.
The silent check valve is widely used in:
Water supply and distribution systems
Drainage and sewage pipelines
Pump discharge lines
HVAC circulation systems
Industrial and municipal water projects
Clean water and hot water pipelines
Applicable media:
Water, hot water, industrial water, and other non-corrosive fluids.
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FAQ
Q1: What is the advantage of a dual plate check valve compared to a swing check valve?
A: Faster closing speed, reduced water hammer, smaller installation space, and lower pressure loss.
Q2: Can this valve be installed vertically?
A: Yes. It supports both horizontal and vertical installation.
Q3: Is this valve suitable for high-temperature applications?
A: Yes. Depending on material selection, it can operate up to 230°C.
Q4: Does the valve require special flange connections?
A: No. It fits between standard ANSI, DIN, EN, JIS, and other compatible flanges.
Q5: Is maintenance required frequently?
A: No. The compact structure and torsion spring design ensure long service life with minimal maintenance.
