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Singer, a Mueller Brand
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Singer Valve - Model 18-FR - Pressure ...

Singer Valve - Model 18-FR -Pressure Relief Valve

The 18-FR is a remote sensing, high capacity, spring and diaphragm operated, normally closed valve. The inner valve is held closed by the spring. When the sensed pressure increases above the spring setting, the valve opens.

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pressure relief valve

The normally closed valve shall be of stainless steel construction with a spring to adjust the opening pressure.
The inner valve shall be of stainless steel 316 construction and the inner valve shall have EPDM resilient compound for seating.
A separate port will sense pressure to open the valve when system pressure exceeds the valve set-point.
Maximum working temperature: 180° F / 82° C
Maximum working pressure: 400 psi / 27.6 bar

1. Body
2. Plug stainless steel
3. Inner Valve 18FR
4. Resilient Disc
5. Bushing Threaded
6. Clamp Plate Lower
7. Plug 1/8 NPT Stainless Steel
8. Clamp Plate
9. Spring Step
10. Spring
11. Spring Casing
12. Hbolt 0.375-16x2.06 – Machined
13. Diaphragm Pilot EPDM
14. Retainer Disc
15. Nut Hex Jam 3/8-16 UNC
16. Nut Hex 1/4-20 UNC
17. Socket Head Cap Screw
18. 0-Ring
19.0-Ring
20. Screw Hex Head
21. Tag Singer
22. Tag UL Approval
23. Rivet U Drive
24. Plug 1/4 NPT

Singer Valve - Model 18-FR -Pressure Relief Valve

The normally closed valve shall be of stainless st...

Schematic Drawing