Danco Steel Enclosed Spring Full-Nozzle Pressure Relief Valve

Model Descriptions:

Shipboard pressure relief valves in full conformance with the applicable ASTM and military specifications. Steel construction with flanged connections, enclosed spring bonnet and full nozzle design. Sizes 1/2″ x 1″ through 8″ x 10″, available in orifice sizes C, D, E, F, G, H, J, K, L, M, N, P, Q, R and T. A bellows may be added to counteract the effects of back pressure (refer to the second box of the Ordering Data Chart).


  • ASTM F1508
  • Mil-V-24332 Liquid (latest revision)
  • Mil-V-22549 Air/Gas, (latest revision)
  • Mil-V-20065 Steam (Revision D, Type II, Composition D)


  • Danco Valves are the industry’s premier mil-spec relief valves. The valves are quick acting, non-chattering and smooth guiding. They also feature optimal sealing tightness with a unique soft or hard seat design.
  • We warranty materials and workmanship against defects for two years after the date of installation. This comprehensive warranty ensures complete manufacturer support.
  • All valves are wire sealed to prevent unauthorized tampering.
  • For capacity information specific to your application, please contact us.

Standard Materials:

  • Body, Bonnet & Lever Housing: Steel/WCB ASTM A216
  • Nozzle: CRES/CF8M ASTM A351
  • Stem
    • CRES/CR-13 (Similar to XM19) ASTM A276 (Steam Applications)
    • CRES/304 ASTM A276 (Liquid and Air/Gas Applications)
  • Spring: Steel ASTM A689 (Steam and Air/Gas Applications)
  • Disc Assembly:
    • Disc: CRES/304 ASTM A276

Optional Materials:

Valve materials can be customized for your specific application.

Weights & Dimensions
Weights and dimensions are in accordance with ASTM F1508 and ASME specifications. Please contact our Quality Assurance Department or refer to individual drawings for valve-specific data.