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Add the Series GRFS Differential Pressure Gas Flow Sensing Switches to your store or catalog  
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Series GRFS Differential Pressure Gas Flow Sensing Switches

Brand: Cleveland Controls
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Series GRFS switches are for use with natural, manufactured, or LP gas as the measured media in applications such as furnaces, package burners, and other fuel-burning equipment.

They have field-adjustable or factory calibrated set points between 0.18″ wc and 5″ wc. Numerous standard configurations are available, including mounting choices, sample line connector styles , terminal styles , and open or enclosed terminals.

Many options are available also, including manual reset, set point indication, alarm pilot light, time delayed actuation, electronic dual set points, and NEMA-rated enclosures.

Specifications

Brand

Mounting Position

  • Surface mount with the diaphragm in any vertical plane. Neither the gas nor the vent connection should point upward.

Standard Set Point Ranges

  • 0.18 ± 0.05 to 2.0 InchWC
  • 0.18 ± 0.05 to 5.0 InchWC

Field Adjustable "Operate Ranges"

  • 0.23 to 2.0 InchWC
  • 0.23 to 5.0 InchWC

Field Adjustable "Release Ranges"

  • 0.13 to 1.9 InchWC wc
  • 0.13 wc to 4.7 Inch WC

Approximate Switch Differentials

  • For 2.0”wc set point range: progressive, increasing from 0.05 ± 0.02” wc at minimum set point to approximate- ly 0.1” wc at Max. set point.
  • For 5.0”wc set point range: progressive, increasing from 0.05 ± 0.02” wc at minimum set point to approxi- mately 0.3” wc at Max. set point.

Measured Media

  • Air or natural, manufactured, LP, or other gas that will not degrade nitrile

Maximum Pressure

  • 1/2 psi (0.03 bar)

Operating Temperature Range

  • 0° to 190° F (-18.0° to 882° C)

Life

  • 100,000 cycles Min. at 1/2 psi Max. pressure each cycle and at Max. rated electrical load

Electrical Rating

  • 300 VA pilot duty at 115 to 277 Vac, 15 amp noninductive to 277 Vac, 60 Hz

Contact Arrangement

  • SPST-NO
  • SPST-NC
  • SPDT

Electrical Connections

  • Screw terminals with cup washers

Sample Line Connectors

  • Externally threaded 7⁄16” -24 UNS 2A or 7⁄16” -20 UNF 2A thread with nuts and self-aligning ferrules
  • 1/8”-27 NPT Male and Female connectors
  • 1/4”-18 Female thread in combination with 1/8”-27 NPT Female connectors

Approvals

  • UL & cUL. CSA pending

Shipping Weight

  • < 1 lb

Documentation

Data Sheets

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