ASME Safety Valves

Features:
  • Designed for applications where a compact size is required and high flow capacities are not needed
  • All brass construction with stainless steel spring
  • Stamped with "UV" and "NB" symbols
  • Available set pressure range 75-250 PSI (520-1725 kPa)
  • Set pressure tolerance ± 3% of set pressure
  • 120°C max temperature
SP25:
Dimensions 41 (H) x 14.3mm (Hex)
Weight 30g
Set Pressure Connection RBS Part No
965 kPa 1/4" BSPT 4012510
1035 kPa 1/4" BSPT 4012520
1100 kPa 1/4" BSPT 4012530
1379 kPa 1/4" BSPT 4012540
75-250 PSI * 1/4" BSPT/NPT On Request
* Model SP12 1/8" NPT available on request
Features
  • Designed for high capacity and can be ordered as field adjustable units
  • All brass construction with zinc-plated piano wire spring
  • Resilient silicone rubber seal
  • Valves can be unset / factory set and locked with lock nut / factory set and staked (to deter field adjustment)
  • Available set pressure range 40-250 PSI (275-1725 kPa)
  • 120°C max temperature
NF50:
Dimensions: 86 (H) x 22.2mm (Hex)
Weight: 170g
Set Pressure Connection RBS Part No
40 1/2” BSPT 4010510
Unset 1/2” BSPT 4014900
Features
  • Designed for applications where compact size is required and high flow capacities are not required
  • All brass construction with stainless steel spring and silicone rubber seal
  • Resilient pad insures valve is bubble tight to within 10% of set pressure
  • Available set pressure range 25-250 PSI (170-1725 kPa)
  • 120°C max temperature
Dimensions: 38 (H) x 14.3mm (Hex)
Weight: 28g
Set Pressure Connection Model RBS Part No
60 PSI 1/8" NPT NP12 4010512
25-250PSI 1/4" NPT NP25 On Request
Features
  • Compact with high flow rates
  • All brass construction with stainless steel spring and silicone rubber seal
  • Resilient pad insures valve is bubble tight to within 10% of set pressure
  • Available set pressure range 25-350 PSI (170-2413 kPa)
  • 120°C max temperature
Dimensions: 50.5 (H) x 17.5mm (Hex)
Weight: 42g
Set Pressure Connection Model RBS Part No
Unset 1/4" BSPT NT25 4012500
Features
  • An economical solution for high capacity applications
  • All brass construction with stainless steel springs
  • O-ring seal available (silicone or fluorocarbon)
  • Available set pressure range 25-300 PSI (170-2068 kPa)
  • 120°C max temperature
Dimensions: 96.5 (H) x 27.0mm (Hex)
Weight: 268g
Set Pressure Connection Model RBS Part No
Unset 3/4" BSPT NB75 4014939
Features
  • Highest capacity non-code safety valve model
  • All brass construction with stainless steel springs
  • O-ring seal available (silicone or fluorocarbon)
  • Available set pressure range 25-300 PSI (170-2068 kPa)
  • 120°C max temperature
Dimensions: 123 (H) x 41.5mm (Hex)
Weight: 775-858g
Set Pressure Connection Model RBS Part No
Unset 1” BSPT NW10 4014959
Unset 1 1/4” NPT NW12 4014970
Features
  • Designed for use in systems to maintain a desired pressure level
  • Proportional relief valve and not "pop" type safety valve
  • All brass construction with stainless steel springs
  • Poppets: stainless steel (PR25) or nylon with nitrile seal (PR38/PR75)
  • Easily field adjusted with knurled adjustment screw and lock nut
  • 120°C max temperature
Available cracking pressure (PSI) Flow at 5PSI past crack pressure Connection Model RBS Part No
0-20 PSI 2 SCFM 1/4” NPT PR25 4010560
20-60 PSI 2 SCFM 1/4” NPT PR25 On Request
50-125 pSI 2 SCFM 1/4” NPT PR25 On Request
100-200 PSI 2 SCFM 1/4” NPT PR25 On Request
0-20 PSI 5 SCFM 3/8” NPT PR38 On Request
0-20 PSI 10 SCFM 3/4" NPT PR75 On Request