Murphy by Enovation Controls
20DP / 25DP / A20DP / A25DP SERIES DIFFERENTIAL PRESSURE SWICHGAGE®
The 20DP and A20DP Series (2 inch/51 mm dial) and the 25DP and A25DP Series (2-1/2 inch/64 mm dial) Swichgage instruments are diaphragm-actuated, differential pressure-indicating gages with a built-in electrical switch. This switch is used for tripping alarms and/or shutting down equipment.
These gages are intended to monitor and indicate oil, fuel or water filter restriction and can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system.
20DP, 25DP, A20DP and A25DP Swichgage instrument
The gauge pointer makes with an adjustable contact to complete a pilot-duty circuit.
20DPE (was 20DPEO), 25DPE (was 25DPEO), A20DPE (was A20DPEO) and A25DPE (was A25DPEO) Swichgage instrument
Features an internal snap-acting SPDT switch, instead of the single pole/pointer contacts. When the switch closes on rising pressure, it becomes set, as pressure falls the switch resets.
20DPG, 25DPG, A20DPG and A25DPG Murphygage® instrument
Gauge without contact(s).
- Dial: White on black, dual USA/UK standard scale (U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar)
- Case:
- 20 and 25 series: plated steel
- A20 and A25 series: polycarbonate
- Bezel: Polished stainless steel, standard; others available
- Lens: Polycarbonate, high-impact
- Temperature Range:
- Ambient: -40° to 150° F (-40° to 66° C)
- Process: -40° to 250° F (-40° to 121° C)
- Process Connection: 1/8-27 NPTM brass.
- Sensing Element: Beryllium copper diaphragm.
- Gage Accuracy: ±3% maximum across scale
- Snap-Switch Rating (DPE models): SPDT, 3 A @ 30 VDC inductive; 4 A @ 125 VAC inductive
- Adjustable Limit Contact: SPST contact; pilot duty only, 2 A @ 30 VAC/DC; closed when the low limit is met, open when pointer is in normal operating range. Contacts are gold flashed silver.
- Limit Contact Adjustment: by 1/16 in. hex wrench through 100% of scale.
- Limit Contact Wire Leads (20DP and 25DP Series): 18 AWG (1.0 mm2) x 12 in. (305 mm)
- Limit Contact Terminals:
- A20DP Series #4 screw terminals
- A25DP Series #6 screw terminals
- Unit Weight:
- 20DP and A20DP Series: 9 oz. (0.25 kg)
- 25DP and A25DP Series: 11 oz. (0.29 kg)
- Unit Dimensions:
- 20DP and A20DP Series: 3 x 2-3/4 x 2-3/4 in. (76 x 70 x 70 mm).
- 25DP and A25DP Series: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)
