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HR Heated Regulator

Where to Use

  • Natural Gas Sampling: Upstream of an analyzer as a standalone pressure control device or part of a conditioning system
  • ATEX/IECEx Option: Places where flammable gases are likely to occur in quantities sufficient to cause a fire or an explosion (AKA Ex areas, hazardous locations, hazardous areas, explosive atmospheres)
Patented Welker Original Regulate Sample Condition  

The Welker HR Heated Instrument Regulator is a single-stage, spring-loaded, electrically heated pressure reducing valve designed to provide an analytical system with a conditioned gas sample stream at a safe output pressure and temperature. The HR’s controlled heating compensates for the cooling brought on by the Joule-Thomson effect to prevent condensation and maintain sample integrity.


  • IECEx / ATEX Certified
  • Side entry electric heating element with adjustable thermostat
  • Diaphragm- or piston-sensing with multiple pressure control ranges
  • Variety of body and seat materials
  • Ergonomic 4-point hand knob


  • Safe to use in Ex areas around the world
  • Efficient heat transfer at the appropriate temperature
  • Well-suited to installations with height restrictions
  • Adaptable to pressure requirements of downstream equipment
  • Corrosion resistance and process fluid compatibility
  • Quickly, easily, and comfortably adjust the outlet pressure
HR Heated Regulator
More Information
Product Category : Instrumentation
Pressure Control Ranges : 0–25 psig (0–1.7 barg)
0–50 psig (0–3.4 barg)
20–100 psig (1.3–6.8 barg)
75–200 psig (5.1–13.7 barg)
Operation : Diaphragm-Sensing
Features : Thermostatically Controlled Heating Element
Electrical Area Classification : NEC Class I, Div. 1, Groups C &D

Weight and/or dimensions are approximate.

Specifications subject to change without notice.

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