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  • Murphy, 20T-250-8-1/2 is a 2, Temperature Swichgage

Murphy, 20T-250-8-1/2 is a 2, Temperature Swichgage

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28 / 04 / 2021
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Detail Murphy, 20T-250-8-1/2 Is A 2, Temperature Swichgage

The 20T-250-8-1/2 is a 2" Temperature Swichgage?. This very popular design features a diaphragm-actuated, temperature-indicating gage, with a built-in electrical switch for tripping alarms and/or shutdown devices. This model has an 8 foot capillary length with a standard 1/2-14 NPT threading, and a temperature range from 130-250øF (54-121øC). Temperature Switch

The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. This vapor actuated gage features a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against the diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading.

Inside the 20T-250-8-1/2, the gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are grounded through the Swichgage? case. This gage has a self-cleaning motion to enhance electrical continuity.
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