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Bronze Boiler Pressure Safety Relief Valves, ASME Section IV

Series 335 ASME rated Boiler Pressure Relief Valves were developed to fill the hydronic industry's need for a smaller valve for OEM use on popular size boilers up to 510,000 BTU at 30psi (2.11 bar). The compact design, all bronze construction, and modern appearance make them an ideal choice for a wide variety of smaller size OEM boilers. ASME Section IV at 30 PSI set point.


  • Smaller relief valve for popular size boilers up to 510,000 BUT at 30psi (2.11 bar)
  • Silicone disc is highly heat-resistant
  • Compact, modern design is ideal for smaller size OEM boilers
  • Bronze body with bronze seat and stainless steel spring

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 335

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: