Cash Acme® VR-801 vacuum relief valve is designed to protect hot water supply systems and pressure vessels against negative pressure. It is especially well suited for many domestic and commercial systems. It works by preventing internal vacuum conditions that could result in burned out heaters and/or collapsed storage tanks – especially copper. Installed on the cold water supply line, the Cash Acme VR-801 closes tightly under pressure and opens at a 1-inch mercury vacuum. Atmosphere admitted to the system breaks the vacuum, preventing the collapse of the storage tank. It is recommended that the VR-801 be installed in an upright position. The Cash Acme VR-801 is available in 3/4-inch with male inlet. The VR-801 also features a low profile design with a slotted vent hole. This valve features an all brass body and body cap, a heat-resistant silicone seat disc, an integral body seat and brass internal working parts. Also comes with an optional circular dust cover that is approx.1.75-inch diameter.
- Size: 3/4 in.
- Operating Conditions: 210° F (121° C) maximum temperature. 200 PSI maximum water pressure. 15 PSI maximum steam pressure
- Features: Prevents internal vacuum conditions that could result in burned out water heaters and/or collapsed storage tanks – especially copper