Description

Series DP Double Bellows Differential Pressure Switch,Visible Setpoints, Adjustable or Fixed Deadband . . . High Pressure Ranges

 

Two opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost in the DWYER Series DP Differential Pressure Switch. Both set and reset points are easily adjustable through non-interactive, externally accessible controls. DWYER Series DP Differential Pressure Switch Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig.

Features

• Bellows switch design provides sensitivity to pressure changes but resists vibration preventing out of range switching
• External access to set and rest controls makes for easy adjustments
• Visible set point indicators simplify changes

 

Specifications

• Wetted Materials: Brass on ranges 61, 62, 63 or 316SS on ranges 62E, 64E 65E.
• Temperature Limits: -10 to 180°F (-23 to 82°C).
• Pressure Limit: Maximum pressure of the operating range.
• Enclosure Rating: General purpose, weatherproof or explosion-proof.
• Switch Type: Mercury or snap switch, see Ordering Page.
• Electrical Rating: See Ordering Page.
• Electrical Connection: Screw terminal.
• Conduit Connection: General purpose: 1/2″ hole for conduit hub. Weatherproof: 1/2″ conduit hub. Explosion-proof: 3/4″ NPT female.
• Process Connection: General purpose and weatherproof: 1/8″ NPT female. Explosion-proof: 1/4″ NPT male.
• Mounting Orientation: Vertical.
• Set Point Adjustment: Thumbscrew.
• Weight: General purpose: 5 lb (2.3 kg). Weatherproof: 7 lb (3 kg). Explosion-proof: 25 lb (11 kg).
• Agency Approvals: cULus.

 

Models & Ordering

 

Snap Action Switch

Model	Description
DPA-7033-153-61	Differential pressure switch, brass bellows, range 0-10 psid (0-0.7 bar), max. pressure 50 psig (3.5 bar), min. deadband 1.5 psid (.10 bar).
DPA-7033-153-62	Differential pressure switch, brass bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 2.5 psid (.17 bar).
DPA-7033-153-64	Differential pressure switch, brass bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 6.0 psid (.41 bar).
DPA-7043-153-62E	Differential pressure switch, 316SS bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 3.0 psid (.21 bar).
DPA-7043-153-64E	Differential pressure switch, 316SS bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 6.0 psid (.41 bar).
DPA-7043-153-65E	Differential pressure switch, 316SS bellows, range 0-80 psid (0-5.5 bar), max. pressure 600 psig (41.4 bar), min. deadband 20 psid (1.4 bar).

 

Mercury Switch

Model	Description
DPA-33-153-61	Differential pressure switch, brass bellows, range 0-10 psid (0-0.7 bar), max. pressure 50 psig (3.5 bar), min. deadband 1.0 psid (.07 bar).
DPA-33-153-62	Differential pressure switch, brass bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 1.5 psid (.10 bar).
DPA-33-153-64	Differential pressure switch, brass bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 3.0 psid (.21 bar).
DPA-43-153-62E	Differential pressure switch, 316SS bellows, range 0-20 psid (0-1.4 bar), max. pressure 100 psig (6.9 bar), min. deadband 2.0 psid (.14 bar).
DPA-43-153-64E	Differential pressure switch, 316SS bellows, range 0-30 psid (0-2.1 bar), max. pressure 300 psig (20.7 bar), min. deadband 3.5 psid (.24 bar).
DPA-43-153-65E	Differential pressure switch, 316SS bellows, range 0-80 psid (0-5.5 bar), max. pressure 600 psig (41.4 bar), min. deadband 16 psid (1.1 bar).