Dwyer | Mercoid | WE Anderson | Flotect

Mercoid Series DP

Series DP Double Bellows Differential Pressure Switch

Mercoid Series DP
Series DP

Visible Setpoints, Adjustable or Fixed Deadband . . . High Pressure Ranges

Two opposing bellows in the Mercoid Series DP differential pressure switch result in maximum sensitivity, quick response to changes and good vibration resistance. Choice of brass or 316 stainless steel assures broad media compatibility. Setpoint adjustment is easy thanks to external knobs and large, clear scale reading directly in psid.

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.

Mercoid Controls

Mercoid Series DP 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:CE, cUL, UL.

 

Popular Models


Models with Snap Action Switch

MODELDESCRIPTION
DPA-7033-153-61Differential 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-7033-153-62Differential 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-7033-153-64Differential 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-7043-153-62EDifferential 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-7043-153-64EDifferential 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-7043-153-65EDifferential 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).


Models with Mercury Switch

MODELDESCRIPTION
DPA-33-153-61Differential 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-33-153-62Differential 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-33-153-64Differential 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-43-153-62EDifferential 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-43-153-64EDifferential 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-43-153-65EDifferential 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).


 

Options

  • Weatherproof Housing – to order add “W” suffix after DPA. Example: DPAW-7033-153-61.
  • Explosion-proof Housing – to order add “E” suffix after DPA. Example: DPAE-7033-153-61.