Hansen H8021, H8022, H8024, H8025 Safety Relief Valve Manifolds

For parallel installation of pressure relief valves in accordance with ANSI/ASHRAE 15-2007 Safety Code for Mechanical Refrigeration (pressure vessels having 10 cubic feet or more of internal gross volume, shall be fitted with dual pressure relief valves) Considered the only acceptable type of shut-off valve for use with refrigerant relief piping because one valve remains operational, while the other is being replaced; thereby eliminating the need to remove refrigerant from the vessel. UPDATED NOTE: 600 PSIG SWP