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131 Flow Switch

Brand: Delta Mobrey
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The model 131 Flow Switch is suitable for setpoints between 492.12 feet/min (2.5 meter/sec) and 2,500 feet/min (12.5 meters/sec), with a maximum flow rate up to 3,500 feet/min (17.5 meters/sec). 

Vane Operated Flow Switch is designed to provide protection and control in ducted air systems in flammable atmospheres. 

The sensing element is a freely pivoted, counter-weighted vane which at its rest position lies at right angles to the direction of flow. The action of the flow is to pivot the vane and operate a microswitch via a dustproof seal.
Features
  • Better than 1% set-point repeatibility
    • Users can expect a set-point repeatability performance better than 1% on all configurations with some configurations being significantly better
  • More than 35 years experience in the field
    • Installed in a wide range of applications from nuclear power plants to offshore oil rigs, the Performance Series’ long experience in the field offers customers the reassurance that they can be relied upon to survive the test of time in the harshest environments.
  • Safety
    • All Performance Series models come with a safety vent to prevent the enclosure becoming pressurized in the event that the sensor is inadvertently damaged by excessive pressure.

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Specifications

Brand

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
  • CE
  • CSA
  • Ex II 2 GD
  • IECEx Ex db IIC T4 & T6 Gb
  • LVD 2014/35/EU
  • PED 97/23/EC

Cable Entry

  • 3/4” NPT Female
  • M20 x 1.5

Electrical - Free Leads

  • 14 AWG, 2.5 mm²

Electrical Connectors

  • Terminal Block

Electrical Rating

  • CSA & IEC 1058-1 / EN 61058-1: 1 A at 125 Vac Resistive
  • CSA: 100 mA at 30 Vdc
  • CSA: 2 A at 30 Vdc
  • CSA: 5 A at 110/250 Vac
  • 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: 0.6 / 0.3 A at 120/240 Vac

Enclosure Finish

  • Light Gray Epoxy Resin Paint

Enclosure, Body Material

  • Gravity Die Cast in Aluminum-silicon Alloy
  • Sand Cast in High Quality Grey Iron

Environmental Protection

  • Flameproof Ex d
  • IP66
  • NEMA 4

Flow Rate

  • 0 to 3,500 fpm (0 to 17.5 mps) - Max.

Mounting

  • Duct Mount

Mounting Position

  • Vertical

Process Temperature

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

Range

  • Adjustable Set Point Range: 492.12 to 2,460.63 fpm (2.5 to 12.5 mps) - 115 mm & 180 mm Square Vane

Sensor, Probe Style

  • Vane Style Sensor

Storage Temperature

  • -25° to 60° C (-13° to 140° F)

Supply Voltage

  • Withstand Voltage: 2 kV between Live Parts & Earth/Ground
  • Withstand Voltage: 500 V between Open Contacts

Switch Type

  • Standard: DPDT Snap-Action Microswitch
  • Standard: SPDT Snap-Action Microswitch

Wetted Materials

  • Backplate: Mild Steel
  • Counterbalance & Vane: Stainless Steel
  • Vane: Aluminum

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

Documentation

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