Critical Service Safety Valves

Critical Service offers solutions for protection from highly corrosive and toxic mediums.

Series 447, 546, 449


  • Corrosive or aggressive chemicals
  • Chemical equipment and piping
  • Chlorine manufacture and processing
  • Reducing acids
    (e. g. hydrochloric acid, acetic acid)
  • Alkalis or caustic service
  • MDI systems

Product features

  • Valve sizes DN 25 through DN 100, 1″ through 4″
  • Flange connections according to DIN EN, ANSI/ASME and other
  • Body is resistant against most chemicals by special coating
  • PTFE lining or special metals
  • A PTFE or metal bellows protects the bonnet area against product influences
  • Smooth inside surface avoid adherence of corrosive matters
  • 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.