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)
|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)
|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)
|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)
|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.
Caution: Do not mix/interchange Swagelok two ferrule tube fitting end connection components (or other products not governed by industrial design standards) with those of other manufacturers.