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Swagelok Cambridge

Your Authorized Swagelok Sales and Service Center

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)

  • Multiple springs for a selection of set pressure ranges
  • Valves available factory-set to a specified set pressure
  • 1/4 in. and 6 and 8 mm end connections—R3A series
  • 1/2 in. and 12 mm end connections—R4 series

Low-Pressure Proportional Relief Valves (RL3 Series and RL4 Series)

  • One spring for the full set pressure range
  • Valves available factory-set to a specified set pressure
  • 1/4 in. and 6 and 8 mm end connections—RL3 series
  • 1/2 in. and 12 mm end connections—RL4 series

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)

Catalog

Specifications

  • Gas and liquid service
  • All 316L stainless steel construction
  • 1/4 through 1 in. NPT and ISO/BSP parallel thread end connections
  • Certified to PED 2014/68/EU Category IV
  • Five set spring pressure ranges

CAD Files and Sales Drawings

Choose from more than 1 million Swagelok CAD templates and sales drawings in multi-lingual formats CAD templates are available in a variety of 2D or 3D file formats. Sales drawings are available in .pdf format. Search based on product names or part numbers.

EXPLORE CAD FILES

"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 or interchange product components with those of other manufacturers."


Have Questions?

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