Danco Pressure Relief Valves

Steel Semi-Nozzle Valves

DANCO STEEL EXPOSED SPRING SEMI-NOZZLE PRESSURE RELIEF VALVE (SIZES ¼” – 8”)

Steel Exposed Spring

Model Descriptions:

Shipboard pressure relief valves in full conformance with the applicable ASTM and military specifications. Sizes 1/4" through 8". Steel construction with flanged connections, exposed spring bonnet and semi-nozzle design.

Applications:

  • ASTM F1508
  • Mil-V-20065D Steam (Type I, Composition D)

Features:

  • 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.
  • 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 WCB

SEAT: CRES/CF8M ASTM 351

STEM ASSEMBLY: CRES/316 ASTM A276

SPRING: Chrome Vanadium ASTM A231

DISC ASSEMBLY: Disc: CRES CF8M/ASTM A351

Optional Materials:

Valve materials can be customized for your specific application.

Weights & Dimensions

ASME B16.5 Class 150
Size
Approx. Weight
A
B
C
1/4"
13 lbs.
3.0
3.0
13.0
3/8"
13 lbs.
 3.0 3.0 13.0
1/2"
13 lbs.
 3.0 3.0 13.0
3/4"
13 lbs.
 3.0 3.0 13.0
1"
30 lbs.
3.5 3.5 15.0
1 1/4"
35 lbs.
3.8 3.8 16.0
1 1/2"
42 lbs.
4.7 4.7 17.0
ASME B16.5 Class 150
(cont.)
Size
Approx. Weight
A
B
C
2"
59 lbs.
4.7
4.7
18.0
2 1/2"
80 lbs.
5.5 5.5 19.0
3"
80 lbs.
6.0 5.5 19.5
3 1/2"
95 lbs.
6.0 5.5 19.5
4"
170 lbs.
7.0 7.0 24.5
5"
182 lbs.
7.0 7.0 24.5
6 x 8"
450 lbs.
10.0 9.6 41.0
8"
600 lbs.
10.0 10.0 49.5

Alternative flange ratings are available. Center-to-face dimensions can be modified to meet your specific requirements.