CO 2 refrigeration (R-744) systems operate at significantly higher pressures compared to legacy hydrofluorocarbon (HFC) systems. For example, on hot summer days, between its medium-temperature ...

1. A pressure relief valve (PRV) protects equipment by automatically opening to vent process media when the pressure in the inlet nozzle overcomes the downward force of the spring. Courtesy: Emerson ...

Pressure Relief Valves, Models 6500 and 6600, are designed for refrigeration systems. The 6500 Series valves are targeted toward systems operating with new refrigerant blends. These 360 brass alloy ...

STEP 4 Mark the pressure reading for each cylinder on the valve cover in chalk, then move to the next cylinder. TIP For a cylinder below 100 psi, pour 1 teaspoon of engine oil into the plug hole ...