Skip to main content

FITOK Group Proportional Relief Valves

FITOK proportional relief valves release the pressure in pipelines by diverting the flow of media as a way to protect the pipeline components. The valves open in proportion as the upstream pressure increases above the set pressure and close gradually as the upstream pressure decreases.

Relief valves are proportional relief valves that open gradually as the pressure increases. Consequently, they do not have a capacity rating at a given pressure rise (accumulation), and they are not certified to ASME or any other codes.

CONTACT SALES
RLSS-FL8-8_1
  • RV series: 7 color-coded springs available for a wide range of set pressures, 50 to 6000 psig @ 70°F (3.4 to 414 bar @ 20°C)
  • RL series: 10 to 225 psig @ 70°F (0.7 to 15.5 bar @ 20°C)
  • RM series: 3 color-coded springs available for a wide range of set pressures to 1500 psig @ 70°F (3.4 to 103 bar @ 20°C)
  • Maximum outlet pressure:
  • RV series: 1500 psig (103 bar)
  • RL series: 225 psig (15.5 bar)
  • RM series: 1500 psig (103 bar)
  • RV series: 0.14 (3.6 mm)
  • RL series: 0.19 (4.8 mm) and 0.25 (6.4 mm)
  • RM series: 0.25 (6.4 mm)
  • Back pressure
  • Back pressure is the pressure of the outlet of valves. It increases the set pressure of proportional relief valves
  • RV and RM series: Balanced stem design to eliminate the effect of system back pressure
  • RL series: Pre-set pressure = Desired pressure – 0.8 × Back pressure
  • Working temperature: -40°F to 300°F (-40°C to 148°C)
  • Variety of end connections
  • Liquid or gas service
  • Adjustable bonnet cap and adjustable set pressure
  • Lead seal lock wire through lock wire holes to lock proportional relief valve so as to secure a set pressure effectively

Want more information? Reach out to one of our experts.