Title: 330-Strømningsvakt.pdf
General Information The Model VSR-EU is a vane type waterfl ow switch for use on wet sprinkler systems. It is UL Listed and FM Approved for use on steel pipe; schedules 10 through 40, sizes 50 mm thru 200 mm (2" thru 8"). LPC approved sizes are 50 mm thru 200 mm (2" thru 8"). See Ordering Information chart. The VSR-EU may also be used as a sectional waterfl ow detector on large systems. The VSR-EU contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a fl ow of 38 LPM (10 GPM) or more occurs downstream of the device. The fl ow condition must exist for a period of time necessary to overcome the selected retard period. Enclosure The VSR-EU switches and retard device are enclosed in a general purpose, die-cast housing. The cover is held in place with two tamper resistant screws which require a special key for removal.