PARKER / HERL valves


Safety valves for industrial refrigeration


Safety valve screwed

  • depending on back pressure
  • Seat 12 mm
  • Connection G1/2" / G1"
  • Valves with weld-on nipples to DN25 available
  • Pressures up to 40 bar


Parker/Herl is your specialist for safety valves in industrial refrigeration. The valves are "Made in Germany" and are distributed worldwide.


The Mehner GmbH is a certified service partner for our safety valves in Saxony, Germany. They are authorized to repair our safety valves and to adjust them.

Qualified personnel is guaranteed by regular training.


Safety valve flanged

  • depending on back pressure
  • Connection DN15 to DN50
  • Pressures up to 27 bar

Customer benefits

  • Valve body in one piece
  • No welds
  • TÜV design
  • GOST certification
  • high relief services
  • available worldwide
  • available also as a safety valve combination
  • TÜV certificate of adjustment
  • 3.1 Material evidence
  • compliance of the directive on pressure equipment 97/23/EG


Overcurrent safety valve flanged

  • not depending on back pressure
  • with bellows
  • Connection DN25/32
  • Pressures up to 27 bar

Product features

  • suitable for gaseous refrigerant according to: EN 378-1 (Appendix E). Bellows also suitable for liquid refrigerant
  • Housing material: Steel or stainless steel
  • Seat seal: Neoprene
  • Temperature: -50 °C to +120 °C
  • Design: According to DIN EN 12284, EN 13136, EN ISO 4126
  • Overall length: EN 558-1 Basic Series 8
  • Flanged valves according to EN 1092 with Groove or according to ANSI 16.5 class 153 or class 300 RF

Valves for industrial refrigeration


Angle shut-off valve



  • Shut-off valves
  • Non-return valves
  • Dirt collector
  • Control valves with actuator
  • Ball valves
  • Butterfly valves

Product features

  • DN15 to DN400
  • Housing made of steel or stainless steel
  • Refrigerant: NH3...
  • TS: -60 °C to +160 °C
  • PS: 28/42/52 bar
  • Conformity PED 97/23/EG


Inlet pressure regulator
Evaporator pressure regulator
Condenser pressure regulator


Automatic valves

  • Solenoid valves
  • Inlet pressure regulator
  • Differential pressure regulator
  • Pressure reducer
  • Hot gas bypass regulator
  • connectable non-return valves and dirt collector
  • Float switch

Product features

  • DN15 to DN100
  • Housing GGG40.3
  • Refrigerant: NH3...
  • TS: -50 °C to +105 °C
  • PS: 28 bar
  • Conformity PED 97/23/EG


Automatic air vents



The automatic purger V200 was developed as unique, energy-saving device in order to remove non-condensable foreign gases of ammonia refrigeration systems efficiently.

Product features

  • plug-and-play
  • compact design
  • corrosion-resistant
  • Only suitable for ammonia
  • Gweight only 34,5 kg
  • Integrated microprocessor
  • Factory calibrated
  • automatic or manual cycle control
  • up to 20 bleeding points
  • automatic pressure adjustment
  • Power-saving mode
  • Voltage 230 V/50 Hz
  • DN15 to DN400
  • Conformity PED 97/23/EG