Liquid Safety Relief Valves | Product Series

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Liquid Safety Relief Valves

Liquid Safety Relief Valves

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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

  • Product Series: Safety Relief Valves
  • Application: Liquid
  • Valve Type: SRLQ
  • Refrigerant Type: Suitable for Ammoina and other common refrigerants (liquid only)
  • Material Type: Cast Steel, Stainless Steel, PTFE
  • Flow Rate: 33.0 to 78.0 LPM, 8.8 to 20.6 GPM
  • Pressure Relief Setting: 50 to 100 psi
  • Inlet Connection Size: 1/2" to 3/4" FPT
  • Outlet Connection Size: 3/4" to 1" FPT
  • Orifice Size: 5.81 mm, 0.229 inch
  • Connection Type: Inlet: FPT; Outlet: FPT
  • Pressure Rating: 27.6 barg, 400 psig
  • Minimum Operating Temperature: -45 °C, -50 °F
  • Maximum Operating Temperature: 150 °C, 300 °F
  • Minimum Ambient Temperature: -29 °C, -20 °F
  • Maximum Ambient Temperature: 94 °C, 200 °F
  • Specification: Designed to comply with ASHRAE and IIAR standards
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 Valve Type Pressure Relief Setting (psi) Inlet Connection Outlet Connection Flow Rate
110574 SR1LQ 75.0 1/2" FPT 3/4" FPT 40.5 LPM, 10.7 GPM
110575 SR1LQ 100.0 1/2" FPT 3/4" FPT 46.9 LPM, 12.4 GPM
110576 SR2LQ 75.0 3/4" FPT 1" FPT 67.4 LPM, 17.8 GPM
110838 SR1LQ 65.0 1/2" FPT 3/4" FPT 37.9 LPM, 10 GPM
110839 SR1LQ 85.0 1/2" FPT 3/4" FPT 43.2 LPM, 11.4 GPM
110840 SR2LQ 50.0 3/4" FPT 1" FPT 55.3 LPM, 14.6 GPM
110841 SR2LQ 60.0 3/4" FPT 1" FPT 60.6 LPM, 16 GPM
110842 SR2LQ 85.0 3/4" FPT 1" FPT 71.9 LPM, 19 GPM
186342 SR2LQ 100.0 3/4" FPT 1" FPT 78 LPM, 20.6 GPM
186480 SR1LQ 50.0 1/2" FPT 3/4" FPT 33.3 LPM, 8.8 GPM
186821 SR2LQ 60.0 3/4" FPT 1" FPT 60.6 LPM, 16 GPM

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