 HDT’s Pressure Control Valve (PCV) is used in U.S. Navy ship ColPro systems to serve two roles: (1) as a PCV, it closes in response to drops (decays) in zone pressure to limit air loss from the zone; and (2) as an overpressure valve (OPV), it opens to relieve air from the zone if pressure rises due to loss or failure of a mechanical exhaust system. The PCV is completely mechanical and mounts at the zone boundary or to a duct that exhausts to atmospheric pressure. The PCV has a nominal opening pressure of 2.0 in wg. An opening pressure of 1.5 in wg is also available. | |
