DWYER Series AP Diaphragm Operated Pressure Switch

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Description

Series AP Diaphragm Operated Pressure Switch, Visible Setpoint Adjustment, Compact

 

Reliable and convenient, the DWYER 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. DWYER Series AP Diaphragm Operated Pressure Switch used on air, non-corrosive gas or liquid service compatible with wetted parts. Units are available in weather-proof and explosion-proof housing.

Product Applications

  • Low pressure applications
  • Instrument air

 

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

 

Specifications

  • Wetted Materials: Nylon reinforced Buna-N and steel. PTFE and 316 SS optional.
  • Temperature Limits: -30 to 150°F (-35 to 66°C).
  • Pressure Limit: See Catalog page.
  • Enclosure Rating: General purpose. Weatherproof and explosion-proof optional.
  • Switch Type: SPDT mercury switch or SPDT snap switch. Other switch types available.
  • Electrical Rating: Mercury switch: 4 A @ 120 VAC/DC, 2 A @ 240 VAC/DC. Snap switch: 15 A @ 120 VAC, 8 A @ 240 VAC, 0.5 A @ 120 VDC, 0.25 A @ 240 VDC.
  • Electrical Connections: Screw terminal.
  • Conduit Connection: 7/8″ (22.23 mm) hole for 1/2″ (12.7 mm) conduit hub.
  • Process Connection: 1/4″ female NPT.
  • Mounting Orientation: Vertical for mercury switch models, any position for snap switch models.
  • Set Point Adjustment: External screw.
  • Weight: General Purpose: 2 lb (0.9 kg).
  • Deadband: See Catalog page.
  • Agency Approvals: FM, UL. For FM consult factory.

 

Models & Ordering

Model Description
AP-153-33 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).
AP-153-37 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).
AP-153-39 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).
AP-7021-153-33 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).
AP-7021-153-37 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).
AP-7021-153-39 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).

 

 

 

Additional information

Model

AP-153-33, AP-153-37, AP-153-39, AP-7021-153-33, AP-7021-153-37, AP-7021-153-39

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