1113204 Potter VSR-FEX 4 Inch Explosion Proof Flow Switch

The Model VSR-FEX is a vane type waterflow switch for use on wet sprinkler systems located in hazardous locations as shown above. The unit may also be used as a sectional waterflow detector on large systems. The unit contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 gallons per minute (38 Lpm) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.

Specifications

• Environmental Limitations For Hazardous Locations
  • Class I: Div. 1 & Div. 2, Groups C, D
  • Class II: Div. 1 & Div. 2, Groups E, F, G
  • Class III: Div. 1 & Div. 2
• Maximum System Pressure - Up to 450 PSI (31 BAR )
• Minimum Flow Rate for Alarm - 10 GPM (38 Lpm)
• Maximum Surge - 18 FPS (10 m/s)
• Switch Contacts - Two sets of SPDT (Form C), 15.0 Amps at 125/250 VAC, 2.0 Amps at 30 VDC Resistive
• Conduit Entrances - Two conduit entrances provided for ½" conduit with ½" NPT threaded connections
• Enclosure - Cover: Cast Aluminum, Base: Cast Aluminum

1113204 Specifications PDF