EZ-SRV Cartridge Relief Valve

Hansen EZ-SRV Cartridge Pressure Relief valves protect refrigeration pressure vessels and other refrigeration system components from excessive pressure. If an abnormally high pressure occurs, the cartridge pressure-relief valve will open to relieve the excess pressure, preventing potential damage to equipment and injury to personnel.

Rupture Disc Assemblies, Gauges, and Pressure Switches

Hansen rupture disc assemblies (RDAs) are used to indicate which pressure-relief valve has discharged. A pressure-relief valve will re-seat after discharging. However, a rupture disc remains open after bursting. (A rupture disc is not a stand alone safety device.) An installed pressure gauge or switch (required by code) provides a visual or electronic indication that the rupture disc has burst. 

Single Point Sensors and Switches

These compact Single Point Level Sensors and Switches are economical solutions for reliable and accurate level detection. They are designed to detect the presence of ammonia or halocarbon refrigerant liquid (but not oil) at a specific location in vessels containing refrigerant by capacitance-type, non-optic sensing. 

Hand Expansion Valves

Hand Expansion Valves Bulletin Archive

G510 - May 1991.pdf
G510a - May 2000.pdf
G510b - Feb 2013.pdf

Click the button below to download the Hand Expansion Rebuild Kit PDF Rebuild Kits

These precision-calibrated, adjustable, slotted plug flow regulating valves (hand expansion valves) are ideal for metering or flashing expansion of liquid refrigerants.

Their slotted plugs are more tolerant of dirt particles than are common metal-seated taperedplug expansion valves, and are less susceptible to wire drawing.

Valves 2½” (65 mm) and larger have a characterized plug. All valves have near linear flow characteristics per turn open and are tight closing with Teflon seats. These valves have stainless steel stems with back seating for seal replacement. The patented non-leak seal plus packing design permits low torque operation for valve adjustments since the packing nut requires little tightening. Bar handle or yellow seal caps distinguish them from shut-off valves.

Suitable for ammonia or halocarbons.