Model CMAQ and CMAF - Snap Action Float Operated Liquid Level Controls

DESCRIPTION

The INVALCO Models CMAQ and CMAF are snapaction, float-operated level controls, equipped with the popular three-way Micro Valve® unit, actuated by two adjustable yoke-type pusher arms. Adjustable pusher arms permit the control range to be adjusted easily and accurately to the range desired.

With the liquid level below the float the three-way Micro Valve® will be in the low level position and will remain there until the float rises to the preset high level. The Micro Valve® then will reverse positions until the float drops to the preset low level position.

This control has been thoroughly field proven by many installations throughout the country.

Specifications

Float Size:	3-1/2” diameter x 6” long
Working Pressure:	300 psig (limited by collapse pressure of float and process connection).
Temperature Limits:	-20°F to 250°F
Micro Valve®:	Model: 316F1, three-way Ports: Three 1/4” FNPT Body: Anodized aluminum Orifice: Standard 1/16” (100 psi working pressure). Optional 1/32” (250 psi working pressure).

FEATURES

Adjustable span allows for pump up and pump down control. Easy-to-set desired level detection point.

Proven Micro Valve® unit provides long life and ease of maintenance.

Over 35 years of proven field service demonstrates product reliability.

OPTIONS

Steel or ductile iron models are NACE adaptable for use in harsh, corrosive service.

Standard gear stem assembly is 303 Stainless Steel 316 Stainless Steel optional (consult factory).

INSTALLATION

The Model CMAQ and CMAF are equipped with a grooved coupling adapter or 150# ANSI flange for mounting to the vessel wall. The 3-1/2” diameter ball float is designed to pass through a 4” tank nozzle.

The Model CMAQ and CMAF are equipped with a three-way Micro Valve with three 1/4” NPT ports. The Micro Valve has a standard working pressure of 100 psi. Connection to the ports depends on the control action desired. Port positions are shown below (see Figure 1).
With Float Level at Low Level        With Float Level at High Level
Port 1 Closed to 2                                      Port 1 Open to 2
Port 2 Common                                          Port 2 Common
Port 3 Open to 2                                          Port 3 Closed to 2

LEVEL ADJUSTMENT

The Model CMAQ and CMAF are provided with two adjustments permitting the setting of both the high and low level set points. To change this span the following procedure should be used (see Figure 1).

Low Level Set Point
1. Loosen Locknut “C”.
2. Turn Adjust Screw “D” until the Micro Valve operates at the desired position.
3. Tighten Locknut “C” holding Adjust Screw “D” in position.

High Level Set Point
1. Loosen Locknut “A”.
2. Turn Adjust Screw “B” until Micro Valve operates at the desired position.
3. Tighten Locknut “A” holding Adjust Screw “B” in position.

ADDITIONAL INFORMATION

To Order: Specify part number and catalog model number. Above model/part numbers include standard 14” long Float Rod.
See PDF for optional Float Rod lengths.
*At 100°F - For higher temperatures, consult factory.
®Micro Valve is a registered Trademark of Barworth Corporation.

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