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DESCRIPTION

The INVALCO Model CADMEX is furnished with an explosion-proof Micro Switch providing dependable operating for systems requiring electrical control. The standard Micro Switch has SPDT contacts and UL and CSA hazardous area approval. An optional switch arrangement is available with DPDT contacts and spring-loaded design. The DPDT Micro Switch does not have the adjustable differential capability of the SPDT and, therefore, is actuated and released at approximately the same pressure. The CADMEX is offered with a choice of four spring ranges providing a wide range of flexibility in application.

Specifications

Maximum Working Pressure	Actuator: See ordering info table.
Control Switch	Micro Switch, explosion-proof SPDT (DPDT optional), 15 amps @ 125, 250, 480 Vac. 1/2 amp @ 125 Vdc. 1/4 amp @ 150 Vdc.
Process Connection	1/4” NPT
Materials	Diaphragm case - aluminum Diaphragm - Buna-N

FEATURES

Process pressure is applied to the lower diaphragm chamber, causing the stem to rise against the adjustable upper spring. When the lower drive collar has been raised sufficiently, the Micro Switch will operate. As process pressure decreases, the upper drive collar will lower, which causes the Micro Switch to snap back to its original position.

APPLICATION

The CADMEX Series may be used to alarm or control an overpressure or under pressure or to cycle the process between two pressures. The CADMEX is easily converted to a manual reset style by removing one of the drive collars. By field sealing the threads of the adjusting screw where it enters the upper diaphragm case, pressure may be applied to the upper case as well as the lower allowing the CADMEX to be used as a differential pressure switch.

SETTINGS

Any spring may be set to actuate below its stated range, but because heavier springs are less sensitive, it is recommended that the range be selected to most closely match the application.

Pressure switches will be factory set to the mid-point of range specified.

ADDITIONAL INFORMATION

Note: Dimensions -- Inches to the nearest tenth (millimeters to the nearest whole mm), each independently dimensioned from respective engineering drawings.