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Pressure relief valve

Calefactio’s overpressure valves represent the last barrier against excessive pressure in the heating system. Their compact brass design makes them a wise choice for a wide range of applications.

Documents &

Sale Sheet


  • Reliable and compact
  • Protection against overpressure
  • Prevents damage
  • Increased safety
  • Brass construction
  • Threads inlet conforms to ANSI B1.20.1

Technical specifications

PRV075-30 PRV075-150
Connection ¾˝ MNPT ¾˝ MNPT
Maximum Pressure 30 PSI 150 PSI
Maximum Temperature 300°F (149°C) 210°F (99°C)
Maximum Heater Input 419 000 BTU/h 200 000 BTU/h
Certification ASME IV ANSI Z21.22 NSF 372 CSA 4.4 CRN.0G21972.2CL CSA 4.4 ANSI Z21.22

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