DWYER – Series DA/DS Bourdon Tube Pressure Switches

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Description

Series DA/DS Bourdon Tube Pressure Switches

Pressure Ranges to 8000 psi (551.6 bar)

Customers tell us that the Series DA/DS Bourdon Tube Pressure Switches are the best pressure switches made. The Mercoid DA/DS Series is one of the world’s broadest lines of pressure switches. The DA/DS Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low setpoints, is adjustable over the full-scale. The DS Models are equipped with a single external adjustment for setting operating point only. For mercury-free switches, choose between the snap action switch or hermetically sealed snap action switch. Hermetically sealed mercury switch also available.

Product Applications

  • Compressors
  • Mechanical HVAC or process equipment
  • Pump control

 

Features

  • Visible calibrated dial provides an easy and fast check without having to open device causing dangerous conditions to operators
  • On/off indication (except hermetically sealed snap switch models) gives operator clear indication of state of switched equipment that could be located in another location
  • Adjustable or fixed deadband supports control applications by reducing equipment wear-out by unnecessary recycling
  • External switch setpoint adjustments reduces set-up time
  • Pressure ranges of full vacuum to 8000 psig gives application designers the ability to specify standard equipment, simplifying install and training, and reducing servicing costs
  • UL listed, CSA approved many models FM approved to support rigorous process applications and regulations
  • General purpose, weatherproof or explosion-proof enclosures for a variety of indoor or outdoor environments meeting the needs of multiple applications and uses

 

Specifications

  • Wetted Materials: Brass, 403 SS, or 316 SS.
  • Temperature Limit: 180°F (82°C).
  • Pressure Limit: Maximum pressure of the operating range.
  • Enclosure Rating: General purpose, weatherproof or explosion-proof.
  • Repeatability: ±1% of full operating range, ±1.5% on DS-7300 models.
  • Switch Type: SPST mercury switch, SPDT mercury switch, SPDT snap switch.
  • Electrical Rating: See Catalog page.
  • Electrical Connections: Screw terminal.
  • Conduit Connection: General purpose: 1/2″ hole for conduit hub. Weatherproof: 1/2″ conduit hub. Explosion-proof: 3/4″ female NPT.
  • Process Connection: General purpose and weatherproof: 1/4″ male NPT; 1/2″ male NPT on range 15S and 16S. Explosion-proof: 1/2″ male NPT and 1/4″ female NPT.
  • Mounting Orientation: Vertical.
  • Set Point Adjustment: Thumbscrew.
  • Weight: General purpose: 4 lb (1.8 kg). Weatherproof: 6 lb (2.7 kg). Explosion-proof: 8 lb (3.5 kg).
  • Deadband: See Catalog page.
  • Agency Approvals: CSA, FM, UL. (Consult factory for FM approval models.)

 

Models & Ordering

SPDT Mercury Switch 4A @ 120V, 2A @ 240V, Adjust. Deadband

Model Description
DA-21-153-10S Pressure switch, 403SS Bourdon tube, range 25-600 psig, 25 psig min. deadband.
DA-21-153-11S Pressure switch, 403SS Bourdon tube, range 50-1000 psig, 60 psig min. deadband.
DA-21-153-12S Pressure switch, 403SS Bourdon tube, range 100-1500 psig, 90 psig min. deadband.
DA-21-153-13S Pressure switch, 403SS Bourdon tube, range 300-2500 psig, 150 psig min. deadband.
DA-21-153-15S Pressure switch, 403SS Bourdon tube, range 500-5000 psig, 450 psig min. deadband.
DA-21-153-16S Pressure switch, 403SS Bourdon tube, range 800-8000 psig, 750 psig min. deadband.
DA-21-153-25S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-60 psig, 6 psig min. deadband.
DA-21-153-26S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-75 psig, 8 psig min. deadband.
DA-21-153-5S Pressure switch, 403SS Bourdon tube, range 2-60 psig, 4 psig min. deadband.
DA-21-153-6S Pressure switch, 403SS Bourdon tube, range 5-100 psig, 6 psig min. deadband.
DA-21-153-8S Pressure switch, 403SS Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-21-153-9AS Pressure switch, 403SS Bourdon tube, range 40-350 psig, 14 psig min. deadband.
DA-21-153-9S Pressure switch, 403SS Bourdon tube, range 10-300 psig, 14 psig min. deadband.
DA-31-153-1 Pressure switch, brass Bourdon tube, range 1/8-15 psig, 1 psig min. deadband.
DA-31-153-2 Pressure switch, brass Bourdon tube, range 30-0″ Hg Vac, 2″ Hg min. deadband.
DA-31-153-27 Pressure switch, brass Bourdon tube, range 25″ Hg Vac-50 psig, 3.5 psig min. deadband.
DA-31-153-3 Pressure switch, brass Bourdon tube, range 10″ Hg Vac-12 psig, 1 psig min. deadband.
DA-31-153-3A Pressure switch, brass Bourdon tube, range 1/8-20 psig, 1 psig min. deadband.
DA-31-153-4 Pressure switch, brass Bourdon tube, range 1-35 psig, 1.75 psig min. deadband.
DA-31-153-5 Pressure switch, brass Bourdon tube, range 2-60 psig, 3 psig min. deadband.
DA-31-153-6 Pressure switch, brass Bourdon tube, range 5-100 psig, 3.75 psig min. deadband.
DA-31-153-7 Pressure switch, brass Bourdon tube, range 5-150 psig, 6 psig min. deadband.
DA-31-153-8 Pressure switch, brass Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-31-153-9 Pressure switch, brass Bourdon tube, range 10-300 psig, 12 psig min. deadband.
DA-41-153-11E Pressure switch, 316SS Bourdon tube, range 100-1000 psig, 100 psig min. deadband.
DA-41-153-13E Pressure switch, 316SS Bourdon tube, range 200-2500 psig, 210 psig min. deadband.
DA-41-153-21E Pressure switch, 316SS Bourdon tube, range 30-400 psig, 30 psig min. deadband.
DA-41-153-22E Pressure switch, 316SS Bourdon tube, range 75-800 psig, 75 psig min. deadband.
DA-41-153-23E Pressure switch, 316SS Bourdon tube, range 5-75 psig, 3 psig min. deadband.
DA-41-153-24E Pressure switch, 316SS Bourdon tube, range 10-150 psig, 6 psig min. deadband.
DA-41-153-26E Pressure switch, 316SS Bourdon tube, range 30″ Hg Vac-75 psig, 7 psig min. deadband.
DA-41-153-6E Pressure switch, 316SS Bourdon tube, range 10-100 psig, 7 psig min. deadband.
DA-41-153-9E Pressure switch, 316SS Bourdon tube, range 10-300 psig, 18 psig min. deadband.

 

SPST NC Mercury Switch 10A @ 120V, 5A @ 240V, Adjust. Deadband

Model Description
DA-21-2-10S Pressure switch, 403SS Bourdon tube, range 25-600 psig, 25 psig min. deadband.
DA-21-2-11S Pressure switch, 403SS Bourdon tube, range 50-1000 psig, 60 psig min. deadband.
DA-21-2-12S Pressure switch, 403SS Bourdon tube, range 100-1500 psig, 90 psig min. deadband.
DA-21-2-13S Pressure switch, 403SS Bourdon tube, range 300-2500 psig, 150 psig min. deadband.
DA-21-2-15S Pressure switch, 403SS Bourdon tube, range 500-5000 psig, 450 psig min. deadband.
DA-21-2-25S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-60 psig, 6 psig min. deadband.
DA-21-2-26S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-75 psig, 8 psig min. deadband.
DA-21-2-5S Pressure switch, 403SS Bourdon tube, range 2-60 psig, 4 psig min. deadband.
DA-21-2-6S Pressure switch, 403SS Bourdon tube, range 5-100 psig, 6 psig min. deadband.
DA-21-2-8S Pressure switch, 403SS Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-21-2-9AS Pressure switch, 403SS Bourdon tube, range 40-350 psig, 14 psig min. deadband.
DA-21-2-9S Pressure switch, 403SS Bourdon tube, range 10-300 psig, 14 psig min. deadband.
DA-31-2-1 Pressure switch, brass Bourdon tube, range 1/8-15 psig, 1 psig min. deadband.
DA-31-2-2 Pressure switch, brass Bourdon tube, range 30-0″ Hg Vac, 2″ Hg min. deadband.
DA-31-2-27 Pressure switch, brass Bourdon tube, range 25″ Hg Vac-50 psig, 3.5 psig min. deadband.
DA-31-2-3 Pressure switch, brass Bourdon tube, range 10″ Hg Vac-12 psig, 1 psig min. deadband.
DA-31-2-3A Pressure switch, brass Bourdon tube, range 1/8-20 psig, 1 psig min. deadband.
DA-31-2-4 Pressure switch, brass Bourdon tube, range 1-35 psig, 1.75 psig min. deadband.
DA-31-2-5 Pressure switch, brass Bourdon tube, range 2-60 psig, 3 psig min. deadband.
DA-31-2-6 Pressure switch, brass Bourdon tube, range 5-100 psig, 3.75 psig min. deadband.
DA-31-2-7 Pressure switch, brass Bourdon tube, range 5-150 psig, 6 psig min. deadband.
DA-31-2-8 Pressure switch, brass Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-31-2-9 Pressure switch, brass Bourdon tube, range 10-300 psig, 12 psig min. deadband.
DA-41-2-11E Pressure switch, 316SS Bourdon tube, range 100-1000 psig, 100 psig min. deadband.
DA-41-2-13E Pressure switch, 316SS Bourdon tube, range 200-2500 psig, 210 psig min. deadband.
DA-41-2-21E Pressure switch, 316SS Bourdon tube, range 30-400 psig, 30 psig min. deadband.
DA-41-2-23E Pressure switch, 316SS Bourdon tube, range 5-75 psig, 3 psig min. deadband.
DA-41-2-24E Pressure switch, 316SS Bourdon tube, range 10-150 psig, 6 psig min. deadband.
DA-41-2-26E Pressure switch, 316SS Bourdon tube, range 30″ Hg Vac-75 psig, 7 psig min. deadband.
DA-41-2-6E Pressure switch, 316SS Bourdon tube, range 10-100 psig, 7 psig min. deadband.
DA-41-2-9E Pressure switch, 316SS Bourdon tube, range 10-300 psig, 18 psig min. deadband.

 

SPST NO Mercury Switch 10A @ 120V, 5A @ 240V, Adjust. Deadband

 

Model Description
DA-21-3-10S Pressure switch, 403SS Bourdon tube, range 25-600 psig, 25 psig min. deadband.
DA-21-3-11S Pressure switch, 403SS Bourdon tube, range 50-1000 psig, 60 psig min. deadband.
DA-21-3-12S Pressure switch, 403SS Bourdon tube, range 100-1500 psig, 90 psig min. deadband.
DA-21-3-13S Pressure switch, 403SS Bourdon tube, range 300-2500 psig, 150 psig min. deadband.
DA-21-3-15S Pressure switch, 403SS Bourdon tube, range 500-5000 psig, 450 psig min. deadband.
DA-21-3-25S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-60 psig, 6 psig min. deadband.
DA-21-3-26S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-75 psig, 8 psig min. deadband.
DA-21-3-5S Pressure switch, 403SS Bourdon tube, range 2-60 psig, 4 psig min. deadband.
DA-21-3-6S Pressure switch, 403SS Bourdon tube, range 5-100 psig, 6 psig min. deadband.
DA-21-3-8S Pressure switch, 403SS Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-21-3-9AS Pressure switch, 403SS Bourdon tube, range 40-350 psig, 14 psig min. deadband.
DA-21-3-9S Pressure switch, 403SS Bourdon tube, range 10-300 psig, 14 psig min. deadband.
DA-31-3-1 Pressure switch, brass Bourdon tube, range 1/8-15 psig, 1 psig min. deadband.
DA-31-3-2 Pressure switch, brass Bourdon tube, range 30-0″ Hg Vac, 2″ Hg min. deadband.
DA-31-3-27 Pressure switch, brass Bourdon tube, range 25″ Hg Vac-50 psig, 3.5 psig min. deadband.
DA-31-3-3 Pressure switch, brass Bourdon tube, range 10″ Hg Vac-12 psig, 1 psig min. deadband.
DA-31-3-3A Pressure switch, brass Bourdon tube, range 1/8-20 psig, 1 psig min. deadband.
DA-31-3-4 Pressure switch, brass Bourdon tube, range 1-35 psig, 1.75 psig min. deadband.
DA-31-3-5 Pressure switch, brass Bourdon tube, range 2-60 psig, 3 psig min. deadband.
DA-31-3-6 Pressure switch, brass Bourdon tube, range 5-100 psig, 3.75 psig min. deadband.
DA-31-3-7 Pressure switch, brass Bourdon tube, range 5-150 psig, 6 psig min. deadband.
DA-31-3-8 Pressure switch, brass Bourdon tube, range 10-200 psig, 8 psig min. deadband.
DA-31-3-9 Pressure switch, brass Bourdon tube, range 10-300 psig, 12 psig min. deadband.
DA-41-3-21E Pressure switch, 316SS Bourdon tube, range 30-400 psig, 30 psig min. deadband.
DA-41-3-22E Pressure switch, 316SS Bourdon tube, range 75-800 psig, 75 psig min. deadband.
DA-41-3-23E Pressure switch, 316SS Bourdon tube, range 5-75 psig, 3 psig min. deadband.
DA-41-3-24E Pressure switch, 316SS Bourdon tube, range 10-150 psig, 6 psig min. deadband.
DA-41-3-26E Pressure switch, 316SS Bourdon tube, range 30″ Hg Vac-75 psig, 7 psig min. deadband.
DA-41-3-6E Pressure switch, 316SS Bourdon tube, range 10-100 psig, 7 psig min. deadband.
DA-41-3-9E Pressure switch, 316SS Bourdon tube, range 10-300 psig, 18 psig min. deadband.

 

SPDT Snap Switch, Adjust. Deadband

Model Description
DA-7021-153-10S Pressure switch, 403SS Bourdon tube, range 25-600 psig, 67.5 psig min. deadband.
DA-7021-153-11S Pressure switch, 403SS Bourdon tube, range 50-1000 psig, 142.5 psig min. deadband.
DA-7021-153-12S Pressure switch, 403SS Bourdon tube, range 100-1500 psig, 195 psig min. deadband.
DA-7021-153-13S Pressure switch, 403SS Bourdon tube, range 300-2500 psig, 390 psig min. deadband.
DA-7021-153-15S Pressure switch, 403SS Bourdon tube, range 500-5000 psig, 1350 psig min. deadband.
DA-7021-153-16S Pressure switch, 403SS Bourdon tube, range 800-8000 psig, 2250 psig min. deadband.
DA-7021-153-25S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-60 psig, 18 psig min. deadband.
DA-7021-153-26S Pressure switch, 403SS Bourdon tube, range 30″ Hg Vac-75 psig, 22.5 psig min. deadband.
DA-7021-153-5S Pressure switch, 403SS Bourdon tube, range 2-60 psig, 13.5 psig min. deadband.
DA-7021-153-6S Pressure switch, 403SS Bourdon tube, range 5-100 psig, 19.5 psig min. deadband.
DA-7021-153-8S Pressure switch, 403SS Bourdon tube, range 10-200 psig, 22.5 psig min. deadband.
DA-7021-153-9AS Pressure switch, 403SS Bourdon tube, range 40-350 psig, 30 psig min. deadband.
DA-7021-153-9S Pressure switch, 403SS Bourdon tube, range 10-300 psig, 28.5 psig min. deadband.
DA-7031-153-1 Pressure switch, brass Bourdon tube, range 1/8-15 psig, 6 psig min. deadband.
DA-7031-153-2 Pressure switch, brass Bourdon tube, range 30-0″ Hg Vac, 13.5″ Hg min. deadband.
DA-7031-153-27 Pressure switch, brass Bourdon tube, range 25″ Hg Vac-50 psig, 12 psig min. deadband.
DA-7031-153-3 Pressure switch, brass Bourdon tube, range 10″ Hg Vac-12 psig, 6 psig min. deadband.
DA-7031-153-3A Pressure switch, brass Bourdon tube, range 1/8-20 psig, 6 psig min. deadband.
DA-7031-153-4 Pressure switch, brass Bourdon tube, range 1-35 psig, 7.5 psig min. deadband.
DA-7031-153-5 Pressure switch, brass Bourdon tube, range 2-60 psig, 9 psig min. deadband.
DA-7031-153-6 Pressure switch, brass Bourdon tube, range 5-100 psig, 13.5 psig min. deadband.
DA-7031-153-7 Pressure switch, brass Bourdon tube, range 5-150 psig, 24 psig min. deadband.
DA-7031-153-8 Pressure switch, brass Bourdon tube, range 10-200 psig, 24 psig min. deadband.
DA-7031-153-9 Pressure switch, brass Bourdon tube, range 10-300 psig, 37.5 psig min. deadband.
DA-7041-153-13E Pressure switch, 316SS Bourdon tube, range 200-2500 psig, 600 psig min. deadband.
DA-7041-153-21E Pressure switch, 316SS Bourdon tube, range 30-400 psig, 78 psig min. deadband.
DA-7041-153-22E Pressure switch, 316SS Bourdon tube, range 75-800 psig, 180 psig min. deadband.
DA-7041-153-23E Pressure switch, 316SS Bourdon tube, range 5-75 psig, 12 psig min. deadband.
DA-7041-153-24E Pressure switch, 316SS Bourdon tube, range 10-150 psig, 16.5 psig min. deadband.
DA-7041-153-26E Pressure switch, 316SS Bourdon tube, range 30″ Hg Vac-75 psig, 15 psig min. deadband.
DA-7041-153-6E Pressure switch, 316SS Bourdon tube, range 10-100 psig, 15 psig min. deadband.
DA-7041-153-9E Pressure switch, 316SS Bourdon tube, range 10-300 psig, 42 psig min. deadband.

 

 

 

 

 

Additional information

Model

DA-21-153-10S, DA-21-153-11S, DA-21-153-12S, DA-21-153-13S, DA-21-153-15S, DA-21-153-16S, DA-21-153-25S, DA-21-153-26S, DA-21-153-5S, DA-21-153-6S, DA-21-153-8S, DA-21-153-9AS, DA-21-153-9S, DA-31-153-1, DA-31-153-2, DA-31-153-27, DA-31-153-3, DA-31-153-3A, DA-31-153-4, DA-31-153-5, DA-31-153-6, DA-31-153-7, DA-31-153-8, DA-31-153-9, DA-41-153-11E, DA-41-153-13E, DA-41-153-21E, DA-41-153-22E, DA-41-153-23E, DA-41-153-24E, DA-41-153-26E, DA-41-153-6E, DA-41-153-9E, DA-21-2-10S, DA-21-2-11S, DA-21-2-12S, DA-21-2-13S, DA-21-2-15S, DA-21-2-25S, DA-21-2-26S, DA-21-2-5S, DA-21-2-6S, DA-21-2-8S, DA-21-2-9AS, DA-21-2-9S, DA-31-2-1, DA-31-2-2, DA-31-2-27, DA-31-2-3, DA-31-2-3A, DA-31-2-4, DA-31-2-5, DA-31-2-6, DA-31-2-7, DA-31-2-8, DA-31-2-9, DA-41-2-11E, DA-41-2-13E, DA-41-2-21E, DA-41-2-23E, DA-41-2-24E, DA-41-2-26E, DA-41-2-6E, DA-41-2-9E, DA-21-3-10S, DA-21-3-11S, DA-21-3-12S, DA-21-3-13S, DA-21-3-15S, DA-21-3-25S, DA-21-3-26S, DA-21-3-5S, DA-21-3-6S, DA-21-3-8S, DA-21-3-9AS, DA-21-3-9S, DA-31-3-1, DA-31-3-2, DA-31-3-27, DA-31-3-3, DA-31-3-3A, DA-31-3-4, DA-31-3-5, DA-31-3-6, DA-31-3-7, DA-31-3-8 DA-31-3-9, DA-41-3-21E, DA-41-3-22E, DA-41-3-23E, DA-41-3-24E, DA-41-3-26E, DA-41-3-6E, DA-41-3-9E, DA-7021-153-10S, DA-7021-153-11S, DA-7021-153-12S, DA-7021-153-13S, DA-7021-153-15S, DA-7021-153-16S, DA-7021-153-25S, DA-7021-153-26S, DA-7021-153-5S, DA-7021-153-6S, DA-7021-153-8S, DA-7021-153-9AS, DA-7021-153-9S, DA-7031-153-1, DA-7031-153-2, DA-7031-153-27, DA-7031-153-3, DA-7031-153-3A, DA-7031-153-4, DA-7031-153-5, DA-7031-153-6, DA-7041-153-9E

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