Click image to view full size image
The super check valve consists of two plates hinged on a single pin. The load is carried by two plates supported at the center by a single beam through the cylindrical valve body. The curved portion of the plates are supported by a flat shoulder in the valve body.
The torsion spring actuates the plates for positive closure before the reverse flow can occur in most applications. The stop pin serves as a positive stop to limit the plates from traveling more than 85 degrees. The design is as per API 594.
Single Door Wafer Check Valve (Fl-Hook)
