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A brief overview of each Circle Seal Controls relief valve design is
listed below:
| Series |
Name |
Cracking Pressure Range |
Materials |
Sizes |
| 500 |
Adjustable Popoff & Inline Relief Valve |
0.5-150 psi |
Aluminum, Brass, 316SS |
1/8" to 1-1/4" |
| HP500 |
High Pressure Relief Valve |
150-450 psi |
Brass |
1/4" & 1/2" |
| 5100 |
Relief Valve |
10-2,400 psi |
Brass, Steel, 303SS, 316SS |
1/8" to 1-1/4" |
D500 ASME |
ASME Safety Relief Valve |
15-150 psi |
Naval Brass, 316SS |
1/4" & 3/8" |
M5100
ASME |
ASME Safety Relief Valve |
20-1,200 psi |
Naval Brass, 316SS |
1/8" to 1" |
| R5200 |
Adjustable Right-Angle Relief Valve |
50-4,500 psi |
Brass, 316SS |
1/4" & 3/8" |
| 5300 |
Relief Valve |
400-10,500 psi |
Brass, 303SS, 316SS |
1/4" & 1/2" |
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