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Dwyer Diaphragm Operated Pressure Switch, Series AP

Series AP Diaphragm Operated Pressure Switch

Brand: Dwyer Instruments, LLC
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Reliable and convenient, the Series AP Diaphragm Operated Pressure Switch is a compact switch for instrument air or other low pressure applications.

Visible set point and external adjustment add convenience.

Used on air, non-corrosive gas or liquid service compatible with wetted parts. Units are available in weather-proof and explosion-proof housing.
Features
  • Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation
  • External switch set point adjustment reduces set-up time

1 - 6 of 6 Part Numbers
AP-153-33
AP-153-33
DWYER Diaphragm Operated Pressure Switch, Range 10" Vac-50" W.C. (2.5-12.4 kPa), SPDT Mercury Switch, Low Deadband 5" W.C. (1.2 kPa), High Deadband 6" W.C. (1.49 kPa), Max. Pressure 15 psig (1.03 bar).
  • Output - SPDT Mercury Switch
  • Pressure Range - -10 Inches Hg to 50" Inches WC
AP-153-37
AP-153-37
DWYER Diaphragm Operated Pressure Switch, Range 1-30 psig (.07-2.1 bar), SPDT Mercury Switch, Low Deadband 0.4 psig (0.03 bar), High Deadband 0.75 psig (0.05 bar), Max. Pressure 60 psig (4.14 bar).
  • Output - SPDT Mercury Switch
  • Pressure Range - psig: 0 to 30 (bar: 0 to 2, kPa: 0 to 206)
AP-153-39
AP-153-39
DWYER Diaphragm Operated Pressure Switch, Range 10-125 psig (.69-8.6 bar), SPDT Mercury Switch, Low Deadband 2 psig (0.14 bar), High Deadband 6 psig (0.41 bar), Max. Pressure 160 psig (11.0 bar).
  • Output - SPDT Mercury Switch
  • Pressure Range - psig: 10 to 125 (bar: 0.689 to 8.618, kPa: 68.95 to 861.8)
AP-7021-153-33
AP-7021-153-33
DWYER Diaphragm Operated Pressure Switch, Range 10" Vac-50" W.C. (2.5-12.4 kPa), SPDT Snap Switch, Low Deadband 8" W.C. (2.0 kPa), High Deadband 10" W.C. (2.49 kPa), Max. Pressure 15 psig (1.03 bar).
  • Output - SPDT, Snap Acting Switch
  • Pressure Range - -10 Inches Hg to 50" Inches WC
AP-7021-153-37
AP-7021-153-37
DWYER Diaphragm Operated Pressure Switch, Range 1-30 psig (.07-2.1 bar), SPDT Snap Switch, Low Deadband 0.75 psig (0.05 bar), High Deadband 1.5 psig (0.10 bar), Max. Pressure 60 psig (4.14 bar).
  • Output - SPDT, Snap Acting Switch
  • Pressure Range - psig: 0 to 30 (bar: 0 to 2, kPa: 0 to 206)
AP-7021-153-39
AP-7021-153-39
DWYER Diaphragm Operated Pressure Switch, Range 10-125 psig (.69-8.6 bar), SPDT Snap Switch, Low Deadband 3 psig (0.21 bar), High Deadband 7 psig (0.48 bar), Max. Pressure 160 psig (11.0 bar).
  • Output - SPDT, Snap Acting Switch
  • Pressure Range - psig: 10 to 125 (bar: 0.689 to 8.618, kPa: 68.95 to 861.8)
1 - 6 of 6 Part Numbers

View_Details

Specifications

Brand

Adjustment Type

  • External Screwdriver Slot

Approvals & Certifications

  • CE
  • FM
  • UL

Conduit Connection

  • 7/8” Hole for 1/2” Conduit Hub

Deadband

  • psig: 0.4 to 7 (kPa: 2.7 to 48, bar: 0.027 to 0.48)

Electrical Connectors

  • Screw Terminal

Electrical Rating

  • Mercury Switch: 2 A at 240 Vac/Vdc
  • Mercury Switch: 4 A at 120 Vac
  • Snap Switch: 0.25 A at 240 Vdc
  • Snap Switch: 0.5 A at 120 Vdc
  • Snap Switch: 15 A at 120 Vac
  • Snap Switch: 8 A at 240 Vac

Environmental Protection

  • Explosion-proof
  • Weatherproof

NPT Connection

  • 1/4” NPT Female

Sensor Orientation

  • Vertical for Mercury Switch Models

Set Point - Decreasing

  • bar: 0.07 to 8.62
  • Inches Hg: -10 to 0 psi
  • Inches WC: 0 to 50
  • kPa: 7 to 862
  • psig: 1 to 125

Set Point - Increasing

  • bar: 0.07 to 8.62
  • Inches Hg: -10 to 0 psi
  • Inches WC: 0 to 50
  • kPa: 7 to 862
  • psig: 1 to 125

Switch Type

  • SPDT Mercury Switch or Snap Switch

System Pressure

  • bar: 1.03 to 11.03
  • kPa: 103.4 to 1,103
  • psig: 15 to 160

Temperature Range

  • -35° to 66° C (-30° to 150° F)

Wetted Materials

  • 316 Stainless Steel
  • Nylon Reinforced Buna-N
  • PTFE
  • Steel

  • Low Pressure Applications
  • Instrument Air

Documentation

Approvals

Catalogs

Manuals

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