Delta Controls Differential Pressure Switch, 306/386
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306/386 Differential Pressure Switch

Brand: Delta Mobrey
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The model 306/386 Performance Series differential pressure switches utilise a nitrile diaphragm based sensor. This, when coupled with a precision stainless steel mechanism designed to minimise friction in the moving parts.
Features
  • Precision stainless steel mechanism for arduous atmospheres and high humidity
  • Set point adjustable over whole range against calibrated scale with tamperproof adjuster
  • Weatherproof and Flameproof models ATEX and IEC EX
  • Safety vented or blow out device as standard
  • Hermetically sealed microswitch option
  • Models for fixed switching differential, adjustable differential and HI-LO operation
  • Ranges available up to psi: 60 (kPa: 400, bar: 4)
  • Static pressure up to psi: 200 (kPa: 1,500, bar: 15)

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Specifications

Brand

Adjustment Type

  • Set Point Field Adjustable

Ambient Temperature Range

  • -25° to 60° C (-13° to 140° F)

Applications

  • Chemical Industry
  • Food Industry
  • Oil & Gas Applications
  • Petrochemical
  • Power
  • Refining

Approvals & Certifications

  • ATEX Ex db IIC T4 to T6, Flameproof
  • CE
  • CSA
  • Ex II 2 GD, II 3 GD
  • IEC Ex: Ex db IIC T4 & T6 Gb
  • LVD 2014/35/EU
  • PED 97/23/EC

BSP Connection

  • 1/4” BSPT Female

Cable Entry

  • 3/4” NPT Female
  • Cable Gland & Back Nut: M20
  • M20 x 1.5

Conduit Connection

  • 3/4” Conduit

Diaphragm Material

  • Nitrile

Electrical - Free Leads

  • 14 AWG, 2.5 mm²

Electrical Connectors

  • Terminal Block

Electrical Contacts

  • Gold Alloy Contacts for Low Energy Circuits

Electrical Rating

  • CSA & IEC: 1 A at 125 Vac
  • CSA: 1 A at 30 Vac/dc
  • CSA: 100 mA at 30 Vdc
  • CSA: 2 A at 30 Vdc
  • CSA: 5 A at 110/250 Vac
  • CSA: 5 A at 30 Vdc
  • IEC 947-5-1 / EN 60947-5-1: 0.22 / 0.1 A at 125/250 Vdc
  • IEC 947-5-1 / EN 60947-5-1: 0.3 A at 120 Vac
  • IEC 947-5-1 / EN 60947-5-1: 0.6 / 0.3 A at 120/240 Vac

Enclosure Finish

  • Light Gray Epoxy Resin Paint

Enclosure, Body Material

  • Flameproof: Die Cast Aluminum-silicon Alloy
  • Flameproof: Sand Cast in Grey Iron
  • Weatherproof & Exn: Austenitic Stainless Steel
  • Weatherproof & Exn: Die Cast Zinc Alloy

Environmental Protection

  • Flameproof Ex d
  • IP66
  • NEMA 4
  • NEMA 4X
  • Weatherproof

Flange Material

  • Aluminum Alloy
  • Cast Iron

Materials of Construction

  • Mounting Bracket: Stainless Steel

Mounting

  • 2” Pipe Mounting Bracket

Mounting Position

  • Vertical

Operating Pressure

  • Maximum 15 bar (200 psi)

Process Temperature

  • 0° to 60° C (32° to 140° F) - Max.

Repeatability

  • Set Point Repeatability: ± 1 % of Span at 20° C (68° F) Ambient

Seat / Seal Material

  • Seal: Nitrile

Set Point - Decreasing

  • bar: 0.1 to 4
  • Inches WC: -0.25 to 50
  • kPa: 10 to 400
  • mbar: -0.6 to 350
  • psi: 1 to 60

Set Point - Increasing

  • bar: 0.1 to 4
  • Inches WC: -0.25 to 50
  • kPa: 10 to 400
  • mbar: -0.6 to 350
  • psi: 1 to 60

Static Pressure

  • psi: 0 to 200 (kPa: 0 to 1,500, bar: 0 to 15)

Storage Temperature

  • -25° to 60° C (-13° to 140° F)

Switch Type

  • DPDT Hermetically Sealed & Snap-Action Microswitch
  • SPDT Hermetically Sealed & Snap-Action Microswitch

System Pressure

  • bar: 200
  • kPa: 20,000
  • psi: 2,900

Voltage

  • Impulse to Withstand Voltage Across Contacts: 0.5 kV
  • Impulse to Withstand Voltage Across Contacts: 0.8 kV
  • Insulation Voltage: 125 V
  • Insulation Voltage: 250 V
  • Withstand Voltage: 1.2 kV - Micro Switch
  • Withstand Voltage: 2 kV between Live Parts & Earth/Ground
  • Withstand Voltage: 500 V between Open Contacts

  • Oil & Gas
  • Chemical
  • Petrochemical
  • Refining
  • Power
  • Food Industry

Documentation

Data Sheets

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