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.
Energized by a direct power connection, the thermostatically controlled heating element ensures efficient heat transfer to prevent condensation. The wide temperature control range means you can set the thermostat above the hydrocarbon dew point of the gas in accordance with industry standards. With the heating element installed to the side of the HR, it’s well-suited to installations with height restrictions.
Multiple pressure control ranges let you adapt the HR to your instrument and application. The threaded HR is diaphragm-sensing for greater sensitivity, giving you more control when setting the outlet pressure. With a bolted spring housing and body, the piston-sensing HR can handle higher inlet and outlet pressures. The threaded body style comes with an ergonomic 4-point hand knob, making field adjustments quick, easy, and comfortable. A locknut prevents the spring setting from changing due to vibration to help maintain a constant outlet pressure and flow.
Is there something in the air? You may be in an explosive atmosphere. Knowing these hazardous locations require specially designed equipment, Welker updated its patented HR-4SS Heated Instrument Regulator specifically for this purpose. Our ATEX/IECEx HR is certified to international standards and the European ATEX Directive, making it safe for global use in Ex areas.
|Materials of Construction||Regulator Base and Body: 316/316L Stainless Steel (Standard), Others Available
Seals: Varies Based on Customer Specifications and the MAOP of the Unit
|Pressure Control Ranges||0–25 psig|
|Feature||Thermostatically Controlled Heating Element|
|Maximum Allowable Operating Pressure||Bolted: 5000 psig @ -20 °F to 120 °F
Threaded: 2160 psig @ -20 °F to 120 °F
|Electrical Area Classification||NEC Class I, Div. 1, Groups C &D|
Relief Valve and Pressure Gauge
Note: A downstream relief is required.
|Heating Element Option|
|Electrical Connection||Power||Temperature Range||Current||Resistance|
|AC1 120 V||150 W||68 °F to 212 °F||1.25 A||144 Ω|
|200 W||68 °F to 212 °F||1.67 A||72 Ω|
|AC 240 V||200 W||68 °F to 212 °F||0.833 A||288 Ω|