The Globe Model RCW Water Control Valve is a hydraulically operated external resetting differential latching style valve designed for use where quick-opening and total flooding of sprinkler system piping is desired. It is used as an automatic water control valve in Deluge, Dry Pipe, or Preaction systems, as well as foam-water sprinkler systems.
Setting of the Model RCW Valve requires water pressure in the diaphragm chamber provided via a connection from the main water supply from a point upstream of the system main control valve, through a restricted orifice.
Water pressure on the diaphragm is transferred to the plunger rod which forces the roller arm mechanism against the clapper, preventing the supply water from entering the sprinkler system piping. Actuation (tripping) of the Model RCW Valve is accomplished by releasing water from downstream of the restricted orifice. Water pressure release can be caused by a variety of types of actuation trim and devices. For example the supply can be fed to a line of wet pilot sprinklers for wet pilot type Deluge or Preaction systems. Other devices which can be used for valve actuation include a dry pilot actuator, or an electric solenoid valve with an associated releasing control panel.
Instructional videos can be found here under the 'installation' category.
MODEL RCW FLOW CONTROL VALVEGFV-200_20190506CM (.pdf)
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Model RCW – 4 and 6-inch Automatic Water Control Valve: Where external resetting differential latching style valves are specified for use in deluge type sprinkler systems they shall be specifically listed for such use. Automatic water control deluge valves shall be ductile iron construction intended for use in vertical orientations. The bronze clapper assembly shall be mechanically seated by the pressure within the diaphragm holding the bronze plunger rod and stainless-steel roller arm in the set position against the clapper assembly. Water pressure release and operation of the valve is accomplished from wet pilot, dry pilot, or electric actuation. Automatic water control valves shall be rated for use at the maximum service pressure of 300 psi., and shall be UL listed and FM approved. Automatic Water Control Deluge Valve shall be Model RCW with Deluge System Trim Kit; as manufactured by Globe Fire Sprinkler Corporation.
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.