Danco D447UU

Model Descriptions:

Danco D447UU Shipboard air compressor pressure relief valve drawing
Drawing (PDF)

Shipboard air compressor pressure relief valve in full conformance with Mil-V-22549. Inlet connection is 1/2″ union end silver braze in accordance with Navy standard drawing #810-1385946. Outlet connection 3/4″ union end silver braze. Bronze construction, top-guided with soft-seat design and a threaded cap. Rated to 1500 PSIG.


  • 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-seat design.
  • Shock approved in accordance with Mil-S-901C. Vibration approved in accordance with Mil-Std.-167-1.
  • 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: Bronze/ASTM B61
  • Bonnet, Cap & Disc: Naval Brass/ASTM B21
  • Disc Insert: Viton
  • Seat & Stem: CRES 304/ASTM A276
  • Spring: Music Wire/ASTM A228

Weights & Dimensions:

  • Overall Height: 7.00″
  • Center-to-Inlet Face: 2.86″
  • Center-to-Outlet Face: 2.88″
  • Unit Weight: 4 LBS.

Note: Dimensions include Union Nuts & Tailpieces

DANCO Valve Identification System:

Danco D447UU Shipboard air compressor pressure relief valve chart

 WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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