Industrial pressure and vacuum switches
87Pages

Industrial pressure and vacuum switches XMLA, XMLB, XMLC, XMLD, 9012G and 9016G

Industrial pressure and vacuum switches XML, 9012G and 9016G Selection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pages 2 and 3 Selecting a pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pages 4 and 5 Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pages 6 and 7 XML electromechanical pressure and vacuum switches b b b b b

Selection guide Electromechanical pressure and vacuum switches XML range Control circuits Media controlled Air, water, hydraulic oils, corrosive fluids, viscous products Fixed differential: detection of a single threshold Adjustable differential: regulation between two thresholds Dual-stage switches: fixed differential, detection at each threshold Fluid characteristics Air, fresh water, sea water, corrosive fluids, viscous products, up to 320 °F (160 °C) depending on model Size (pressure range) 1 C/O single-pole, snap action 2 C/O single-pole, simultaneous, snap action 2 C/O single-pole,...

Selection guide Industrial pressure and vacuum switches 9012G and 9016G ranges Control circuits Media controlled Air, water, hydraulic oils (1), gases and steam Fixed differential: detection of a single threshold Adjustable differential: regulation between two thresholds Power circuits Dual-stage switches: (change in the Fixed difference differential, between two detection at pressures) each threshold Differentialpressure Vacuum switches for control circuits Vacuum switches for power circuits Fluid characteristics Size (pressure range) Diaphragm: 0.2–675 psi on falling pressure Piston...

Industrial pressure switches Selecting a pressure switch Steps for selecting a pressure switch Choose Pressure Range Differential Enclosure Electrical Fluid Connection Connection Special System Features Response Time Commercial reference The deciding factors in the selection of a pressure switch for use on control circuits(1) depend on the requirements of the application. Consider the following requirements to help determine the appropriate commercial reference for your application. 1. Setpoints: Do you want to control/monitor one setpoint or two? • One setpoint: fixed differential • Two...

Industrial pressure switches Selecting a pressure switch (continued) 6. Enclosure: What type of enclosure do you need? Open style NEMA Type 1 Dual stage, 1 SPDT contact each stage, 1 N/O, 1 N/C 7. Output: What output type do you require? SPDT contacts, 1 N/O, 1 N/C 2 SPDT contacts, 1 N/O, 1 N/C Horsepower rated, 9016GVG vacuum switch only 8. Electrical connection: What type of electrical connection do you require? ½"- 14 NPTF ISO M20 metric threads Type 13 (PG 13.5) metric threads ¾"-14 NPTF (available only on NEMA 7 & 9) No threaded connection (open style or NEMA 1 only) 9. Pressure...

Industrial pressure switches Measuring range The measuring range (MR) of a pressure sensor corresponds to the difference between the upper and lower values measured by the load cell. It ranges between 0 and the pressure corresponding to the size of the sensor. Operating range The operating range of a pressure transmitter corresponds to its measuring range. Within this range, its analog output signal varies between 4 and 20 mA or 0 and 10 V, and is proportional to the measured pressure. The operating range of a pressure or vacuum switch is the difference between the values of the minimum low...

Industrial pressure switches Terminology (continued) Terminology (continued) Switching point on rising pressure (PH) This is the upper pressure setting at which the output of the electronic pressure or vacuum switch changes state on rising pressure. Switching point on falling pressure (PB) This is the lower pressure setting at which the output of the electronic pressure or vacuum switch changes state on falling pressure. Differential This is the difference between the switching point on rising pressure (PH) and the switching point on falling pressure (PB). The low point can be set at the...

Electromechanical pressure and vacuum switches XML range XML pressure and vacuum switches for control circuits are used to control the pressure of hydraulic oils, fresh water, sea water, air, steam, corrosive fluids, or viscous products, up to 7250 psi (500 bar). b XMLA pressure and vacuum switches have a fixed differential and are for detection of a single threshold. They incorporate a 1 C/O single-pole contact. b XMLB pressure and vacuum switches have an adjustable differential and are for regulation between two thresholds. They incorporate a 1 C/O single-pole contact. b XMLC pressure and...

Electromechanical pressure and vacuum switches Introduction (continued) Environmental specifications Conformity to standards Product certifications Fluids or products controlled Hydraulic oils, air, fresh water, sea water, 32–320 °F (0 to 160 °C), depending on model Steam, corrosive fluids, viscous products, 32–320 °F (0 to 160 °C), depending on model Case: zinc alloy. Component materials in contact with fluid: see page 62. Operating position Vibration resistance Shock resistance Electric shock protection Screw terminal models: IP66 conforming to IEC/EN 60529 Connector models: IP65...

Electromechanical pressure and vacuum switches Introduction (continued) Pressure and vacuum switches control or regulate pressure or vacuum levels in hydraulic or pneumatic systems. They transform the pressure change into a digital electrical signal when the preset operating points are reached. Switches for control circuits Switches with control-duty rated electrical contacts, designed for control of contactors, relays, power valves, PLC inputs, etc. Switches for power circuits Switches with power electrical contacts (1, 2, or 3 pole) designed for direct switching of single-phase or...

Electromechanical pressure and vacuum switches XML range Vacuum switch operating principle Detection of a single threshold The switches for detection of a single threshold (fixed differential) have a single adjustable setting point (PH). The differential between the high and low points (PH–PB) depends on the inherent characteristics of the switch. It is not adjustable. Fixed differential PH = High point PB = Low point –– Adjustable value --- Nonadjustable value Example: Contact schematics of XMLA Regulation between two thresholds The switches for regulation between two thresholds...