Designed for use as primary relief valves in ASME tanks, such as 1137 L, 2273 L or 4546 L tanks. UL Lists include tank systems in which these valve types are mounted externally of the body with no additional protection in the case of near-body mounting and protective cap.
| Housing: | Brass |
| Spring: | Steel |
| Stock: | Stainless steel |
| Seat disc: | Elastic rubber |