Relief
Proportional Relief Valves
- Provide simple, reliable, over-pressure protection for a variety of general-industry applications
- Have easy external set pressure adjustment
High-Pressure Proportional Relief Valves (R3A Series and R4 Series)
Specifications
| Working Pressures | up to 6000 psig (413 bar) |
| Springs | multiple springs available for a selection of pressure ranges |
Low-Pressure Proportional Relief Valves (RL3 Series and RL4 Series)
Specifications
| Working Pressures | up to 300 psig (20.6 bar) |
| Springs | one spring for the full set pressure range |
Proportional Relief Valves (R3A,R4, RL3, and RL4 Series)
Options
| Seal Materials | Fluorocarbon FKM is standard. Buna N, ethylene propylene, and neoprene are available factory-installed or in replacement seal kits for field assembly. |
| Spring Kits | Replacement spring kits are available for all models |
| Manual Override Handles | A manual override handle opens the valve without changing the set pressure. Available factory-installed or in kits for field assembly. |
| Special Cleaning and Packaging | Swagelok Special Cleaning and Packaging (SC-11) to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C. |
Proportional Safety-Relief Valve, High-Pressure (PRV Series)
Specifications
| Working Pressures | up to 5800 psig (400 bar) |
| Set Pressure | 145 to 6000 psig (10.0 to 413 bar) |
| Seal Materials | Fluorocarbon FKM and nitrile |
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"Safe Product Selection:
The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.
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