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Pressure Relief Valve
SPIROL 420 Stainless Steel Coiled Spring Pins are used in pressure relief valves to secure lift levers relative to pull rods. These valves are used to regulate temperature and pressure in residential water heaters and storage tanks.
The flexibility of the Coiled Pin enables a friction fit engagement with the rod and a free fit with the lever. Since the rod provides more engagement length than the lift levers, it is better suited to be used as the friction fit portion of the hinge (Figure 1).