REGULATORS FOR SPECIFIC APPLICATIONS
Models VREA, VRSA
Ultra-High-Purity, Stream or Electrically Heated,
Vaporizing Regulators

Models VREA and VRSA 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 VREA incorporates a 120 volt/100 watt thermostatically controlled heating element, with a digital temperature display visible through a window in the junction box. It also has a 4-20 mA analog output capability for remote temperature monitoring and data acquisition. The controlling circuit is housed in an explosion-proof, dust tight junction box compliant with National Electric Code requirements for Class 1, Div. 1 – Group B, C and D standards. The Model VRSA 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 light hydrocarbon streams.

Standard Features

• 270° Turn Potentiometer Adjustment allows high resolution in temperature control (ModelVREA).
• Control Circuit is housed in an explosion-proof, dust tight junction box compliant with NEC requirements for Class 1, Div. 1 – Groups B, C and D standards (Model VREA).
• LCD Temperature Display and 4-20 mA analog output (Model VREA)
• Metal-to-Metal Diaphragm to Body Seal(no backup o-ring) assures maximum diffusion resistance.
• Pressure rated per criteria of ANSI/ASME B31.3.
• Cleaned to CGA 4.1 and ASTM G-93 Intermediate Level.

• Mounting Ring permits regulator to be panel mounted
• 240 VAC powered unit

Table I