Air Cooled Temperature Controller

An analyzer cabinet is cooled by a Vortec cooler; the air flow to the Vortec cooler needs to be adjusted to compensate for changes in ambient conditions.

An ASCO Posiflow modulating solenoid valve is used to regulate the air supply to the Vortec cooler which has the effect of changing the cooling air temperature delivered to the analyzer cabinet. The temperature of the analyzer cabinet is monitored by an RTD and Dwyer temperature controller. The modulating solenoid follows the output of the PID controller. A Dwyer Photohelic differential pressure switch monitors the purge pressure in the enclosure and initiates loss of pressure alarm. The required power supply for the modulating solenoid is included with the enclosure.

Advantages:

• Single purchase order for complete system
• Assembly and testing by factory trained technicians at Mead O'Brien, Inc.
• Delivered ready for installation with no further assembly

Bill of Materials
(1) ASCO SD8202G17V, modulating solenoid
(1) ASCO Kit 8908001, solenoid controller
(1) Dwyer D16150, PID controller
(1) Dwyer A3000-0, Differential Pressure Gauge and Switch
(1) Dwyer VFB-SSV-53, Purgemeter
(1) Newark 24 volt, 0.6 amp power supply
Stainless Steel tube and fittings
Conduit hubs
Enclosure vent

© 2001 Mead O'Brien, Inc.