Modulate Action Safety Valves

Modulate Action offers solutions for applications with normal and/or proportional opening characteristics (e.g. thermal expansion).

Series 429, 433


  • Thermal expansion
  • Reciprocating compressors and plants with pulsating operating pressure
  • Heat transfer oil systems
  • Protection of liquids
  • Overflow operation
  • Mechanical engineering (OEM)

Product features

  • Great variety materials and options to fit any application
  • Valve sizes DN 15 through DN 150, 1/2″ through 6″
  • Flange connections according to DIN EN, ANSI/ASME and other
  • Low overall height and low weight
  • One connection size for inlet and outlets
  • Single trim for gas and liquid

Expert technical

Contact us for expert technical advice with applications, grade selection and product working pressures.

Wide range of

DH Stainless stock the widest range of stainless steel piping and tubular products.

Three stock

DH Stainless have our main distribution stock hub at our head office in North West England as well as stock branches in Scotland and South East England.