Johnson Controls 279777 ENCAPSULATED PRESSURE SWITCHES, HIGH LIMIT, OPEN O

ENCAPSULATED PRESSURE SWITCHES, HIGH LIMIT, OPEN O

The Johnson Controls 279777 ENCAPSULATED PRESSURE SWITCHES, HIGH LIMIT, OPEN O is recommended to be installed in a vertical position. The PCB Diagram part number for this item is: 279777 . The type of the product is Digital Pressure Switch and it is used in Refrigeration and Air Conditioning applications.

A pressure switch, high limit, OPEN O, 70VAC/120VDC, up to 1/8" NPT with 3/4" FPT with 2-hole flange.

The 279777 is a high limit open operator pressure switch used for safety shut down of various process systems. This switch is equipped with an encapsulated sensing element which is designed to withstand the harsh, extreme atmospheres commonly found in process industries.

Johnson Controls has introduced an envelope of pressure switches above 30,000 psi. The High Limit Pressure Switches are encapsulated packages with leak-free seals that exceed any clean room environment. The switches are usually used to prevent equipment failure due to overpressure, but can also be used to stabilize flow in the event of an overpressure interrupt.

The Aube Johnson Controls 279777, EMX-1 Encapsulated Pressure Switch, Failure to Open replaces models 111871, 112047, 111872, 112048, 112132. Ideal for HVAC applications where pressure must exceed 25 PSI to open vent.

The 279777 series high limit switches from Johnson Controls are capable of switching up to 1000 psi working pressure and 1000 psig maximum test pressure. All switches have a bronze enclosure for corrosion protection. The switches are designed for use in systems that pressurize or de-pressurize a fluid medium by a syringe, a needle valve, a screw valve, a piston pump, or any other device that creates a differential pressure across the switch membrane system.

The 277 series of high-limit switches are designed to protect centrifugal pump suction piping for intermittent service, reflux lines, vapor lines, relief lines, and chemical feed lines on system pressure up to 3000 psig. The 277 series has provisions for remote indication of MagneGuard® type overload protection by visual inspection. To meet remote indication requirements, an external protected terminal box must be added. 277 switches are available with M8 or M12 male nips for connection to EPR-F20 or F22 magnetic flowmeters. 277 switches are also available with screw terminals for easy wire termination or with bushing

For use with line volt potable water systems where a high limit switch is required.

The Johnson Controls 279777 pressure switch pressure settings at the rated service pressure. The switch closes when the service pressure passes 4.0psi and will open again at approximately 9 to 10 psi.

The new 277-Series Valve Pressure Switches are designed to safely control the on/off operation of solenoid valves, built-in relief valves, and pressure switches in water heaters, domestic gas appliances, and medium voltage air compressors.

The RLD Series extinguishers are available to protect hazardous liquids and gases from passing through process lines. They can withstand up to 200 Hg Vac and 530 Deg C. The RLD Series features a robust, easy-to-service design that reduces maintenance downtime.