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Dwyer Series A1PS - A1VS Economical Pressure Switch

Economical Pressure Switch - Vacuum and Compound Ranges Available, Adjustable Set Point.
Series A1PS/A1VS Economical Pressure Switches are designed with a 15 Amp SPDT relay for direct control of pumps and motors. Available in pressure, vacuum, or compound ranges, the switches offer a field adjustable set point. Easily adjust the switch by aligning the top of the self locking adjusting nut with the desired setting indicated on the adjacent range scale. The unit includes a 1/4" NPT (M) for quick installation and can be mounted in any position.
 
---Physical Data
  • Service: Compatible liquids or gases.
  • Maximum Pressure: 600 psig.
  • Maximum Vacuum: 29.9" Hg (vacuum and compound models only).
  • Temperature Range: -31 to 185°F (-35 to 85°C).
  • Process Connection: 1/4" NPT (M).
  • Switch Type: SPDT snap action.
  • Electrical Ratings: 15 Amp (resistive) @ 250 VAC, 1/2 HP @ 250 VAC.
  • Setpoint: Field adjustable via knurled screw cap
  • Cycling: Not to exceed 60 CPM.
  • Sensor Element: Diaphragm.
  • Wetted Parts: Diaphragm: Buna-N; Body with Fitting: Zinc alloy, chromate finish.
  • Electrical Connections: Three screw terminals.
  • Weight: 7.4 oz (209g).
-Stocked Model
Model
Number
Set Point Range (kPa) Repeatability (kPa) Deadband (approx.) (kPa)
A1PS-14 1.5-3.5 psi (10-24) ± 0.15 psi (1) 0.5-1.7 psi (3-11)
A1PS-24 3-40 psi (21-276) ± 1.0 psi (7) 2-5 psi (14-34)
A1PS-34 30-150 psi (207-1034) ± 5.0 psi (34) 5-30 psi (34-207)
A1PS-44 100-500 psi (689-3445) ±20.0 psi (138) 30-120 psi (207-827)
A1VS-14 6-28" Hg (-20 to -94) ±1.2" Hg (-4) 3-14" Hg (-10 to 47)
A1VS-24 28" Hg to 3.5 psig ±1.2" Hg (-4) 3-14" Hg (-10 to -47)