Description

Series APS/AVS Adjustable Pressure Switch, Vacuum and Pressure Ranges, 5 A Switch,

Compact Size

 

Miniature DWYER Series APS/AVS Adjustable Pressure Switch offer reliable switching for pressure/vacuum alarm, shutdown or control. The units are readily adjustable throughout their range using the locking adjusting ring and indicating pointer. The DWYER Series APS/AVS Adjustable Pressure Switch body is constructed of stainless steel for durability in harsh environments. Switches include 12″ (30 cm) wire leads sealed with epoxy for additional protection.

Product Applications

• OEM
• Compressors
• Motor control
• Process equipment
• Pump control

 

Features

• Field adjustable with simple indicating pointer reduces installation time bringing application on-line faster
• Stainless steel construction provides a durable solution in harsh environments

 

Specifications

• Service: Compatible liquids or gases.
• Wetted Materials: Capsule: 17-7 PH SS; Fitting: 303 stainless steel.
• Temperature Limits: -65 to 225°F (-54 to 107°C), a set point change of up to 2% when used below -10°F (-23°C) or above 125°F (52°C).
• Pressure/Vacuum Limits: 150% of range.
• Switch Type: SPDT snap action.
• Electrical Ratings: 5 A @ 250 VAC, 3 A @ 28 VDC.
• Electrical Connections: 3-wire, 20 AWG insulated with PVC, 12″ (30 cm) length.
• Process Connection: 1/8″ male NPT.
• Set Point: Field adjustable.
• Cycling: Not to exceed 20 CPM.
• Sensor Element: Capsule.
• Weight: 3 oz (85 g).
• Agency Approvals: UR.

 

Models & Ordering

Pressure

Model	Description
APS-150	Adjustable pressure switch, set point range 0.8-28.5 psi (.06-2.0 bar) increasing, 1.6-30.0 psi (.11-2.1 bar) decreasing, ±0.6 psi (.04 bar) repeatability, 0.8-1.3 psi (.06-.09 bar) deadband.
APS-250	Adjustable pressure switch, set point range 2.0-48.0 psi (.14-3.3 bar) increasing, 3.0-50.0 psi (.21-3.5 bar) decreasing, ±1.0 psi (0.7 bar) repeatability, 1-1.7 psi (.07-.12 bar) deadband.
APS-350	Adjustable pressure switch, set point range 3.0-96.5 psi (.21-6.7 bar) increasing, 4.5-100 psi (.31-6.9 bar) decreasing, ±2.0 psi (.14 bar) repeatability, 1.6-4 psi (.11-.28 bar) deadband.
APS-450	Adjustable pressure switch, set point range 7.5-242 psi (.52-16.7 bar) increasing, 9.7-250 psi (.67-17.2 bar) decreasing, ±5.0 psi (.35 bar) repeatability, 2.5-9 psi (.17-.62 bar) deadband.
APS-550	Adjustable pressure switch, set point range 15.0-485 psi (1.0-33.4 bar) increasing, 20.0-500 psi (1.4-34.5 bar) decreasing, ±10.0 psi (.69 bar) repeatability, 5-22 psi (.35-1.5 bar) deadband.

 

Vacuum

Model	Description
AVS-150	Adjustable pressure switch, set point range 1.6-27.1″ Hg (4.1-68.6 cm Hg) increasing, 2.7-28.2″ Hg (6.9-71.6 cm Hg) decreasing, ±1.2″ Hg (3.1 cm Hg) repeatability, 1.3-2.7″ Hg (3.3-6.9 cm Hg) deadband.
AVS-350	Adjustable pressure switch, set point range 6.0-21.5″ Hg (15.2-54.6 cm Hg) increasing, 8.4-28.2″ Hg (21.3-71.6 cm Hg) decreasing, ±4.0″ Hg (10.2 cm Hg) repeatability, 2.6-7.3″ Hg (6.6-18.5 cm Hg) deadband.