The Dungs 217-340A (GML-A4-4-4) Gas Pressure Switch has a 1.00" - 20.00" W.C. setting range. The GML-A4-4-4 is an SPDT pressure switch without requiring auxiliary power and can be manually reset.
Karl Dungs offers a wide range of pressure switches; GML (Low Manual Reset), GMH (High Manual Reset), and GAO (Automatic Reset). These A4 series pressure switches are applicable to industrial and commercial heating, ventilation, and air-conditioning systems applications that use natural gas, propane, butane, air, and other inert gases.
The switch come complete with an adjustable dial with scaling to set the desired set point. Also, equipped with a test nipple located at the metal housing for set point verification.
The pressure switch adjustable feature makes it suitable for controlling automatic gas burners. Standard installation is for mounting in a vertical position and if mounted horizontally, the set point may shift about 0.2" W.C.
A neon light is included which serves as tripped switch indicator if the set point exceeded.
| GML Pressure Switch Accessories/Replacement Parts | |
| MODEL NO. | DESCRIPTION |
| 220-566 | Conduit Adapter 1/2" NPT |
| 233-113 | Replacement Cover |
| 244-156 | Replacement Light (Yellow Bulb) |
| 248-240 | Replacement Light (Green Bulb) |
| 244-157 | Replacement Light (Yellow Bulb) |
| 220-566 | Conduit Adapter Pg 11 to 1/2" NPT |
| 240-671 | Conduit Adapter M20 to 1/2" NPT |
| 227-644 | Electrical Plug for A4 |
| 210-318 | DIN connector for A4 |
| Maximum Body Pressure | 15 PSI (1033 mbar) |
|---|---|
| Maximum Operating Pressure | 7 PSI (500 mbar) |
| Enclosure Rating | NEMA Type 4 |
| Pressure Connection | 1/4" NPT Female |
| Ambient Temperature Rating | -40 °F to +140 °F (-40 °C to +60 °C) |
| Setting Range | 1-20 W.C |
| Housing Material | Aluminum |
| Approvals | UL, CSA, FM |
Download Product Information:
Karl Dungs Gas Pressure Switch Pipe Mount A4 Series User Manual
Karl Dungs Gas Pressure Switch Pipe Mount A4 Series Datasheet
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