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Dual Plate Check Valve
(Available in sizes 50 mm (2") NB to 1500 mm (60") NB in pressure ratings ANSI 125 to 2500 for all services.)
Design Features
The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or lift check valve.
The Dual Plate Check Valve design is the result of attempts to solve the problems associated with swing check valve and lift check valve. The Dual Plate Check Valve employs two spring - loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by torsion spring action without requiring reverse flow. The design offers the twin advantages of No Water Hammer and Non Slam simultaneoulsy. All features put together make the Dual Plate Check Valve one of the most efficient design. It is also referred as SILENT CHECK VALVE.
The valve design confirms to APS 597 as well as API 6D except face to face dimensions of ANSI 125 cast iron valves of sizes 50 mm (2") to 300 mm (12"). Valve inspection and testing confirms to API 598.
Dual Plat Check Valves are available in wafer design, flanged wafer design and extended design with flanged ends having face to face dimensions as that of a swing check valve.
Structurally More Sound Design
The valve has cylindrical bod which make the valve look like any other pipe fittings. A cylindrical body of the pressure containing part o the Dual Plate Check Valve can be designed to withstand extreme much to the weight (thickness) of valve. Thus for severe/rugged loading conditions, these valve have a district edge over the conventional valves both in terms of safety and economics besides general versatility.
"Marck" Dual Plate Check Valves have been designed and developed using computer based latest technique of 'Finite element Analysts".
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