1113203 Potter VSR-FEX 3" Explosion Proof Vane Type Waterflow Switch

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

General Information

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.

Enclosure

The unit is enclosed in a cast aluminum housing. The cover is held in place with six M6 x 1 mm-6g; 30 mm long socket head cap screws with a 5 mm hexagonal drive head and a property class of 8.8. These screws can only be replaced with identical ones. A field installable cover tamper switch is available as an option which may be used to indicate unauthorized removal of the cover. See bulletin number 5401024 for installation instructions of this switch.

Technical Specifications

• 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)

1113203 Specifications PDF