Description
HD Swing Check Valves are general purpose rubberfaced check valves approved for use in fire protection systems. These are rated for maximum working pressure of 300 PSI.
These valves are suitable for horizontal as well as vertical installations. The valves are provided with access cover (flange type) and plug (grooved type) for maintenance and drain purpose. Direction of water flow is marked on the valves. HD Swing Check Valve can be installed vertically or horizontally with flow direction as marked on the valve. The Swing Check Valve must be installed in an area not subject to physical damage. When corrosive atmospheres and/or contaminated water supplies are present, it is the owner’s responsibility to verify compatibility with the Swing Check Valve and associated equipment. Prior to installing the valve, thoroughly flush the water supply piping to verify that
no foreign matter is present. The Swing Check Valve may be installed in vertical position with direction of flow up, or in horizontal position with the access cover up. HD Swing Check Valve flanges are Ductile Iron ANSI B16.42, Class 125, with a maximum water working pressure of 300 psi (20.7 bar). ANSI B16.42, Class 125 flanges are not compatible with ANSI Class 250 or Class 300 flanges. HD Swing Check Valves described herein must be installed and maintained in compliance with this document and with applicable standards of National Fire Protection Association (NFPA), in addition to the standards of any authorities having jurisdiction. Failure to do so may impair the performance of these devices.
Valves installed vertically must be positioned with flow in the upward direction. Valves should be installed at reasonable distance downstream from pumps, elbows, reducers, or other similar devices to extend the valve life. Standard piping practice requires a minimum of five (5) times the pipe diameter for general use installation
