Enlarge

DESCRIPTION

These diaphragm-operated liquid level controls are available with either a pneumatic or electrical control switch. The INVALCO Model CADMEX-201 is supplied with an explosion-proof SPDT Micro Switch. This switch is UL and CSA approved. The Model CADM-201 is supplied with the popular snap-action, three-way Micro Valve®, ideally suited for diaphragm motor valve control.

The 2” process connections are recommended where high paraffin or sediment content is present in the measured material.

The most outstanding feature of these controls is the absence of troublesome small orifice and chambers usually found in similar types of floatless level controls.

Specifications

Temperature	-20°F to 250°F
Maximum High Level	22 feet W.C.
Maximum Control Span	11 feet W.C.
Materials	Body: Steel Diaphragm: Buna-N
Containment Pressure	100 psi
Type Control Switch	Models CADM: Micro Valve, 3-way, 1/4” NPT Ports, 1/8” orifice, 100 psi max. W.P. Models CADMEX: SPDT, explosion-proof Micro Switch, 15 Amps @ 125, 250, or 480 Vac, CSA, and UL approved.

OPERATION

Pressure exerted by a column of liquid is applied to the lower diaphragm chamber through the process connection. When the liquid level rises to the preset high level control point, the three-way Micro Valve unit or Micro Switch (depending on which is supplied) is actuated , sending a signal to a control valve, pump, alarm, etc.

The control switch will remain actuated until the liquid level drops to a preset low level point. Both high and low level control points may be adjusted to operate at any point. The spring adjusting screw, located on top of the unit, permits the quick and easy adjustment of the high level control point. The “double collar” switch actuator may be readily adjusted to set the low level control point.

For pressurized vessels the head pressure is piped to the upper diaphragm chamber, automatically correcting for variation in head pressures.

ADDITIONAL INFORMATION

To Order: Specify part number and catalog model number.

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