Safety Relief Valves- SRLQ | Product Series

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Pressure Relief Setting (bar)

Pressure Relief Setting (psi)

Inlet Connection

Outlet Connection

Flow Rate (lpm)

Flow Rate (gpm)

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Safety Relief Valves- SRLQ

Safety Relief Valves- SRLQ

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The SRLQ liquid relief valves are conventional, direct spring loaded safety relief valves designed to protect the liquid containing portions of vessels built to the ASME Boiler and Pressure Vessel Code.

Technical Specifications

  • Model Number: Please Configure Part for Model Number
  • Maximum Operating Pressure: 28 bar, 400 psig
  • Pressure Relief Setting: 3.5 to 6.9 bar, 50 to 100 psi
  • Set Pressure Tolerance: ± 3 % *reseat pressure after release is 20% below set point
  • Minimum Ambient Temperature: -29 °C, -20 °F
  • Maximum Ambient Temperature: 94 °C, 200 °F
  • Valve Type: SR1LQ, SR2LQ
  • Inlet Connection Size: 13 mm, 1/2 inch, 20 mm, 3/4 inch
  • Outlet Connection Size: 20 mm, 3/4 inch, 25 mm, 1 inch
  • Connection Type: FPT
  • Orifice Size: 5.81 mm, 0.229 inch
  • Flow Rate: 33.3 to 78.0 L/min, 8.8 to 20.6 Gal/min
Safety Warning

Full Product Description

The SRLQ liquid safety relief valve is a unique solution providing overpressure protection of vessels containing liquid. While traditional safety relief valves are designed for vapor use only the SRLQ is unique in that is it designed specifically for use with liquids. Safety relief valves are designed to relieve pressure in a vessel when the set pressure is exceeded, preventing potential damage to equipment and injury to personnel. After opening, these valves re-seat when the pressure in the vessel is below the valve’s closing pressure. The liquid safety relief valves (SRLQ) are designed and constructed to meet the requirements of Section VIII ASME Boiler and Pressure Vessel Code and ANSI/ASHRAE 15 code requirements and bear the ASME code symbol. Employing proven principles of design, these safety relief valves are highly reliable and dependable. Precision machined moving parts of stainless steel, and a PTFE disc prevent sticking due to corrosion or cold welding and assure valve opening at the set pressure long after installation.

Markets:
• Industrial Refrigeration
• Commercial Refrigeration

Features and Benefits:
• Suitable for ammonia and halocarbon refrigerants
• ASME Boiler and Pressure Vessel
• Code, Section VIII, Division 1 compliant
• ANSI/ASHRAE Standard 15 safety standard for refrigeration systems
• All stainless steel internal parts
• Non-stick PTFE seat
• Set pressure tolerance of ±3%
• Unaffected by vibration
• Excellent repeatability

Applications:
• Use with Ammonia and halocarbon refrigerants
• Liquid Lines
• ASME rated liquid transfer vessels
• Heat Exchangers
• Condensers
• Coolers
• Vessels containing lubricating oil such as an oil cooler
• NOT suitable for water or other corrosive fluids

Related Documents

Literature and Reference Materials
Data Sheet - Liquid Safety Relief Valve
Safety Relief Valves: SRLQ (Bul. 74-00)
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Products Pressure Relief Setting (bar) Pressure Relief Setting (psi) Inlet Connection Outlet Connection Flow Rate (lpm) Flow Rate (gpm)
110574 5.2 bar 75 psi 13 mm(1/2") 20 mm(3/4") 40.5 lpm 10.7 gpm
110575 6.9 bar 100 psi 13 mm(1/2") 20 mm(3/4") 47.0 lpm 12.4 gpm
110576 5.2 bar 75 psi 20 mm(3/4") 25 mm(1") 67.4 lpm 17.8 gpm
110577 6.9 bar 100 psi 20 mm(3/4") 25 mm(1") 78.0 lpm 20.6 gpm
110837 3.5 bar 50 psi 13 mm(1/2") 20 mm(3/4") 33.3 lpm 8.8 gpm
110838 4.5 bar 65 psi 13 mm(1/2") 20 mm(3/4") 37.9 lpm 10.0 gpm
110839 5.8 bar 85 psi 13 mm(1/2") 20 mm(3/4") 43.2 lpm 11.4 gpm
110840 3.5 bar 50 psi 20 mm(3/4") 25 mm(1") 55.3 lpm 14.6 gpm
110841 4.5 bar 65 psi 20 mm(3/4") 25 mm(1") 62.8 lpm 16.6 gpm
110842 5.8 bar 85 psi 20 mm(3/4") 25 mm(1") 71.9 lpm 19.0 gpm

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