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J-1 Swing Check Valve - Model “ CV-1-S� - 4�
Swing Check Valve Model CV-1-S Standard & " Shotgun" Groove/ Groove 4" Size
Description and Operation
The Globe Model CV-1-S Swing Check Valve features a swing type clapper designed for use in fire sprinkler or other types of water piping systems that incorporate grooved connecting pipe ends. It is effectively used whenever it is necessary to permit water flow in only one direction and to prevent flow in the reverse direction ( non-return) . Because the CV-1-S incorporates a spring-loaded clapper assembly, it may be installed in either the vertical or horizontal position. Most commonly, it is used with various configurations of fire department connections for sprinkler systems, by-pass connections, gravity pressure tank connections, pump discharge in connections from public water supplies to automatic sprinkler systems, etc.
As an alternative to using an alarm check valve with a wet pipe sprinkler system, a CV-1-S Swing Check Valve may be used in a " Shotgun" arrangement whereby the valve is trimmed in a similar manner but utilizes an electric water flow switch and alarm bell instead of a water motor gong for fire notification.
The body of the Globe CV-1-S Swing Check Valve is constructed of high tensile strength cast iron having considerable ductility to reduce damage in field handling. It meets the ASTM A126 Class B rating. The CV- 1-S clapper assembly is made of stainless steel and has an E.P.D.M. rubber facing. The CV-1-S incorporates a special stainless steel spring assembly which allows its use in the downward flow direction. It effectively provides a leak tight seal against back pressures greater than one ( 1) psi. Bronze hinge pin bushings hold the clapper in place against the brass seat.
The Globe Model CV-1-S Swing Check Valve has a " bolted on" access cover plate to which the clapper assembly is factory attached. If field service is ever required, this feature allows very easy servicing without the troublesome need to remove the complete valve assembly from the piping system. This feature is also incorporated in the Globe Model " H" Alarm Valve Series and is a significant advantage over those valves having no access cover plate.