Hansen 3 Way Dual Safety Relief Valve Manifold

Hansen H8021, H8022, H8024, H8025

Three Way Dual Safety Relief Valve Manifold

 

These rugged, forged steel bodied valves facilitate the parallel installation of pressure relief valves. Because three-way valves will not isolate both pressure relief valves simultaneously, they are considered the only acceptable type of shut-off valve for use with refrigerant relief piping. Their durable metal-to-metal seating and patented nonleak packing plus o-ring stem seal design combine for long, trouble-free service. Inlet and outlet connections are threaded female NPT all the same size.
Shown below is a three-way dual shut-off valve in the stem out position (backseated). The valve stem should be positioned so that only one pressure relief valve is activated. While the valve can be either frontseated (front port is closed) or backseated (back port is closed), the backseated position (shown) is recommended for normal use because it takes pressure off the packing and reduces the possibility of packing leaks.