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G3F-PB80-JGF Datasheet(PDF) 4 Page - Magnetrol International, Inc. |
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G3F-PB80-JGF Datasheet(HTML) 4 Page - Magnetrol International, Inc. |
4 / 36 page 4 46-624 Series 3 Liquid Level Switches ASME B31.1 Construction Swing in position Switch Return spring Enclosing tube (non-magnetic) Attraction sleeve Magnet HL 1.0 Introduction Magnetrol's Series 3 level switches are float operated units suitable for use on clean liquid applications for level alarm, pump control and safety shutdown functions. Units are designed, fabricated and certified to compliance with ASME B31.1 specifications. 1.1 Principle of Operation The design of Magnetrol float-operated level switches is based upon the principle that a magnetic field will pene- trate non-magnetic materials such as 316 stainless steel. The float moves a magnetic attraction sleeve within a non- magnetic enclosing tube and actuates a switch mechanism. The enclosing tube provides a pressure seal to the chamber and therefore to the process. 1.2 Operating Cycle As the liquid level rises in the chamber (refer to Figure 1), the float moves the magnetic attraction sleeve up within the enclosing tube and into the field of the switch mecha- nism magnet. As a result, the magnet is drawn in tightly to the enclosing tube causing the switch to trip, “making” or “breaking” an electrical circuit. As the liquid level falls, the float drops and moves the attraction sleeve out of the magnetic field, releasing the switch at a predetermined “low level” (refer to Figure 2). The tension spring ensures the return of the switch in a snap action. 2.0 Installation 2.1 Unpacking Unpack the instrument carefully. Inspect all units for damage. Report any concealed damage to carrier within 24 hours. Check the contents of the packing slip and purchase order. Check and record the serial numbers and model numbers for future reference when ordering parts. Serial # _____________________________________ Model # _____________________________________ Figure 1 Switch Tripped Swing out position LL Figure 2 Switch Released |
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