REGULATORS FOR SPECIFIC APPLICATIONS
Models VRE, VRS
Ultra High Purity, Corrosive Resistant,
Vaporizing Regulators

Models VRE and VRS spring loaded, pressure–reducing regulators are designed to heat and vaporize media before and after pressure reduction to keep condensable liquids in their gas phase. The media is heated while passing through coiled tubes within a heating chamber. Media contact materials of 316 Stainless Steel, Elgiloy® and Vespel® minimize the effects of extreme temperature and provide good corrosion resistance.

The Model VRE incorporates a 120 volt /150 watt thermostatically controlled heating unit. The controlling circuit is housed in an explosion–proof, dust tight junction box compliant with National Electric Code requirements for Class 1 –Groups B, C and D standards. The Model VRS is a steam heat version of the vaporizing regulator.

These regulators are commonly used in gas chromatography, hydrocarbon sampling, fluid fractionalization, sample conditioning and to preheat heavy process fluids.

Standard Features

• Multi–turn Potentiometer Adjustment allows high resolution in temperature control (Model VRE)
• Metal to Metal Diaphragm to Seal(without back–up o–ring) assures maximum diffusion resistance.
• High Purity Regulator Design permits vacuum purging of regulator.
• 1/16" NPT Female Bonnet Vent Port allows bonnet to be connected to a vent line or disposal system as a precaution in the unlikely event of a diaphragm failure.
• Pressure Rated per criteria of ANSI/ASME B31.3
• Filter in Inlet traps foreign matter, extends regulator life and reduces maintenance.

• Mounting Ring permits regulator to be panel mounted
• 50 Watt version approved by the CSA is available.

Table I