A Dual Plate Check Valve (also known as a dual disc, double plate, or butterfly check valve) is a spring-loaded, wafer-type non-return valve designed to prevent backflow in industrial piping systems. Unlike traditional heavy swing check valves, its compact footprint and innovative split-disc design make it an industry-favorite for high-efficiency fluid control.
Key Features & Advantages
Space-Saving Wafer Design: Significantly shorter face-to-face dimensions and lighter weight than standard swing check valves, reducing structural support requirements.
Spring-Assisted Silent Closing: Dual torsional springs accelerate the closure of the plates, minimizing water hammer and pressure surges.
Low Pressure Drop: Streamlined internal flow path ensures high flow coefficients and minimized energy loss.
Versatile Mounting: Suitable for horizontal and vertical piping configurations (upward flow).
Core Applications
Dual plate check valves are heavily utilized across demanding industrial sectors where reliable backflow prevention is mandatory:
Water & Wastewater Treatment: Municipal water supply, desalination plants, and sewage treatment systems.
HVAC Systems: Chilled water loops, condenser water lines, and large commercial building plumbing.
Oil & Gas / Petrochemical: Upstream and downstream processing lines handling hydrocarbons, cooling water, and utility air.
Power Generation: Boiler feed water, cooling tower lines, and auxiliary plant piping.
Working Principle
Forward Flow: Fluid pressure overcomes the resistance of the torsional springs, pushing the two semi-circular plates open against the central stop.
Zero Flow: As flow velocity decreases, the tension of the springs forces the plates evenly back against the valve seat.
Reverse Flow: Back pressure pushes the plates tightly against the seat before flow can reverse, effectively preventing water hammer.
Dual Plate Check Valve Manufacturer and Supplier in Nepal.
