Webswitches are actuated when a flowof 10 GPM (38 LPM) or more occurs downstream of the device. The flowcondition must exist for a period of time necessary to overcome the selected retard period. Enclosure The VSR switches and retard device are enclosed in a general purpose, die-cast housing. The cover is held in place with two tamper resistant WebThe Model VSR is a vane type waterflow switch for use on wet sprinkler systems. It is UL Listed and FM Approved for use on steel pipe; schedules 10 through 40, sizes 2" thru 8" (50 mm thru 200 mm), and schedule 5, sizes 2" thru 6". …

Flow and Tamper Switches – Fire Alarms Boston

WebThis tamper switch action causes a "trouble" for the fire alarm system. Of course, there was a requirement that closing any valve tamper switch could not prevent a flow switch from sending an alarm. So that the waterflow switch could still work, the only wire that could go to a valve tamper was the wire to the end of line resistor. The wire ... WebSystem Sensor PIBV2 Supervisory Tamper Switch For Butterfly and Post Indicator Valves PIV System Sensor $129.95 System Sensor PIBVEXP Explosion Proof Supervisory … s2理論

Flow Switches vs. Pressure Switches in Fire Protection: The

WebVS SP TYPE WATERFLOW SWITCH SMALL PIPE Cover held in place with tamper resistant screws cUL CSFM and NYBSA Listed CE Marked Pressure Up to 250 PSI 17,2 BAR Flow Rate for Alarm 10 GPM 38 LPM Surge 18 FPS 5,5 m s Die cast red enamel nish One set of SPDT Form C standard set optional see below Amps at 125 250VAC Amps at 125VDC Amps at … WebJun 6, 2009 · All new flow switches listed for fire protection service have the cover tamper switch. But 6.8.5.11 also reads "Exception No. 2: Tamper resistant screws or other approved mechanical means shall be permitted for preventing access to junction boxes and device covers installed outside of buildings." s2立国