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Pressure Transmitters & OPL Series Pressure Swichgage?
The PXT-K Series Pressure Transmitters, rugged instruments with extremely small temperature error and class-leading EMI/RFI resistance, are state-of-the-art instruments providing 4-20 mA output. OPL-Series Pressure Swichgage? instruments are combination pressure indicating gages with adjustable low and high limit switches. Limit switches can be wired directly to electric pilot circuits to operate alarms, shutdown or start/stop of engines and electric motors.
SDB Series Temperature Swichgage? & Thermocouple
The direct-mounting SDB Series temperature Swichgage? devices provide an accurate direct-reading gauge with an adjustable limit switch to activate alarms and/or shutdown. Murphy's new thermocouples are encased in a 1/4” diameter 316 stainless steel tubing sheath with stainless steel Bell Spring for strain relief. They incorporate Type K, 20 AWG stranded extension wire encased in a rugged cable to meet demanding environments.
Level Maintainers & Scrubber Level Switches
Lube Level Maintainers automatically add oil to the crankcase as needed to keep the lube level normal. Most models have built-in switches that will alarm and/or shutdown the equipment if the makeup supply is depleted and engine oil level falls, or if overfill conditions exist. Liquid Level Switches are float activated to operate an electrical SPDT reed switch for annunciation/pilot signal for indication of high level to an annunciator, controller or PLC, while pneumatic-vent level devices are used to operate dump valves or similar devices. The diaphragm operated scrubber dump valve opens and closes automatically by pneumatic control from your level controller and dump valve operator.
Vibration Switches & Timers
The VS2 Series switches are shock sensitive mechanisms for shutdown of engine or electric motor powered equipment. These switches use a magnetic latch to ensure reliable operation. Ideal for use on engines, pumps, compressors, heat exchangers and pumping units, the VS2 Series can be used anywhere shutdown protection from damaging shock/vibration is desired. Murphy Time Switches can automatically start or stop engines or electrical motors after a predetermined time. These time switches can be wired for an open or closed circuit when time expires. Designed for use in the oil field, irrigation systems or anywhere equipment must operate or be controlled for a predetermined time, these switches feature a precision movement that gives years of reliable service.
Pulsation Dampener Valves
The PD8100 Series Pulsation Dampeners eliminate pointer flutter on pressure indicating Swichgage? devices which are subject to pulsating pressure from reciprocating pumps or compressors. They also allow a close setting of high and low contact points providing for more accurate pressure indication and control of equipment.