Field Instruments

General

The Model VSR-FEX is a vane type waterflow switch for use on wet sprinkler systems located in hazardous locations. 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.

Features:

• NEMA 4/IP66 solid metal enclosure
• 0-90 second field replaceable retard
• Non-corrosive saddle bushing
• (2) ½” threaded conduit connections
• Assembled in USA

Specifications

• Make : Potter
• Model: VSR-FEX (8”)
• Size: 8”
• Enclosure: Cover: Cast Aluminum Base: Cast Aluminum 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
• environmental Limitations
  • • For use in hazardous locations, Classified as: 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
    • Suitable for indoor or outdoor use with factory installed gasket and cast aluminum housing
    • NEMA 4/IP66 Rated Enclosure - use with appropriate conduit fitting • Temperature:  40°F/120°F (+4.5°C  ≤  Ta  ≤  +49°C)
    • Non-corrosive sleeve factory installed in saddle
• Conduit Entrances: Two conduit entrances provided for ½” conduit with ½” NPT threaded connections. Use an ATEX certified plug of protection “d”, “tb”, and IP66 for all unused conduit openings.
• Service Use: NFPA 13, 72
• Maximum System Pressure: 450 PSI (31 BAR)

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