DWYER – Series DP Double Bellows Differential Pressure Switch

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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 Series DP Differential Pressure Switches. Both set and reset points are easily adjustable through non-interactive, externally accessible controls. Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig.

A wide variety of switches and circuit styles enables exactly the specific type of control function needed for any system. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. Various operations possible include single adjustment – fixed deadband, double adjustment – adjustable deadband, manual reset (increasing or decreasing pressure) and two stage with each SPST or SPDT switch independently adjustable. Standard enclosure is NEMA-1 style. Optional weatherproof construction is for outdoor use and explosion-proof enclosure meets requirements for Class I, Groups C & D; Class II, Groups E, F & G.

Product Applications

  • Accurate switch triggers in high pressure applications

 

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).

 

 

 

 

 

 

 

Additional information

Model

DPA-7033-153-61, DPA-7033-153-62, DPA-7033-153-64, DPA-7043-153-62E, DPA-7043-153-64E, DPA-7043-153-65E, DPA-33-153-61, DPA-33-153-62, DPA-33-153-64, DPA-43-153-62E, DPA-43-153-64E, DPA-43-153-65E

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