R Series proportional relief valves are designed to protect pressure sensitive equipment by diverting flow in order to relieve pressure upstream of pressure sensitive equipment such as analyzers and flow meters.  They open when the upstream pressure exceeds the closing force exerted by the spring, permitting flow through the valve. Flow through the valve increases and decreases proportionately in response to changes in upstream pressure.  Proportional relief valves reseal at a pressure lower than the cracking pressure.

High Pressure and Low Pressure Valves

RL Series

• Working Pressure: up to 300 psig
• Set Pressure: 10 to 225 psig
• Temperature Range:  -40 to 275°F

RH Series

• Working Pressure: up to 6000 psig
• Set Pressure: 60 to 6000 psig
• Temperature Range:  -40 to 275°F
• General Specification
• Materials
• Body: 316 SS
• Seals:
• Fluorocarbon FKM standard
• Nitrile
• Ethylene Propylene
• Neoprene
• Perluoroelastomer FFKM
• Options
• Manual Overide Handle
• Set Factory Pressure
• Special Cleaning