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Last Updates: 28/04/2021

Dwyer Series PG Gas Pressure/Differential Pressure Switch

Large sensitive diaphragm and reliable, time proven mechanical design are combined in Dwyer Series PG Gas Pressure/Differential Pressure Switches. For use with air and other compatible gases, they feature excellent ±1% of full scale repeatability, clear easy-to-read scale and convenient external setpoint adjustment.

Application flexibility is assured by a large variety of switching options including SPST, SPDT, DPST and DPDT; opening or closing on increasing pressure, vacuum or differential. PR and PRL models add manual reset operation on increasing or decreasing pressure. Mercury switches or hermetically sealed snap switches are available where high humidity would be a problem. If vibration or other factors preclude the use of mercury, snap switches can be provided. Standard housing is NEMA 1. Optional enclosures can be supplied for weather-resistant and explosion-proof requirements.

Product Applications

  • Natural, manufactured or LP gas applications

Wetted Materials : Fairprene, brass, steel, and aluminum.

Temperature Limits : -10 to 180°F (-23 to 82°C).

Pressure Limit : Single Pressure Use on High Side: sustained pressure: 15 psig (1.0 bar); surge limit: 20 psig (1.4 bar). Differential Pressure Use: sustained pressure, range P1: 2 psig (.14 bar); sustained pressure, range P2: 10 psig (0.7 bar).

Enclosure Rating : General purpose. Weatherproof and explosion-proof optional.

Repeatability:±1% of full range. Switch Type:See Ordering page.

Electrical Rating : See Ordering page.

Electrical Connections : Screw type.

Conduit Connection : 7/8″ (22.23 mm) hole for 1/2″ (12.7 mm) conduit hub.

Process Connection : 1/2″ male NPT and 1/8″ female NPT used for single positive pressure or high differential pressure, 1/8″ female NPT used for single vacuum or low differential pressure.

Mounting Orientation:Vertical.

Set Point Adjustment : External screw.

Weight : 4.5 lb (2 kg).

Deadband : See Ordering page.

Agency Approvals : UL, CSA, FM for mercury switch skus. UL only on snap switch skus.

  • Clear easy-to-read scale and external set point adjustment simplifies operation and trouble shooting
  • Large diaphragm provides accuracy for precise control
  • Multiple switching options meet the design of applications

Manual: Instruction Manual

Catalog Page: Series PG Catalog Page

Product Data Sheet: PG Datasheet

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