Specifications

67
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Model BVMS Ball Valve Monitor Switch
OS&Y Gate Valve Supervisory Switch Kit
• 3/4”, 1” (BVMS-S40) 1
1
/
4
”, 1
1
/
2
”, 2” (BVMS-L40)
• For use on 950XL, 950XLT and 975XL
• Complete with mounting hardware
• NEMA 4 rated enclosure when using proper electrical fittings (IP67)
• Contacts for both normally open and normally closed operation
• For use on OS&Y type gate valves sizes 2” thru 10”
• Used to monitor the open position of an OS&Y type gate valve
• Kit includes switch and bracket for installation
• On backflow installations a switch is required on each OS&Y gate valve,
thus two OSY-40 switches are required
• Contact ratings: SPDT contacts 10A at 125/250 VAC, 2A at 30 VDC
• On backflow installations a switch is required on each ball valve, thus
two BVMS are required
• UL listed and CSFM Listed, FM approved, NYMEA accepted,
CE marked
• Complies with NFPA 13, 13D, 13R, 71 and 72
• NEMA 4 and NEMA 6P enclosure (IP67) when used with appropriate
watertight conduit fittings
FeaturesFeatures
The Model BVMS is designed to monitor the fully open position of a ball valve installed in
a sprinkler system. The BVMS will mount onto Wilkins 950XL, 950XLT, and 975XL backflow
preventers. The Model BVMS has an internal switch, which is toggled when the ball valve is
moved from the open position. The internal switch however, does not track the position of the
handle or ball. When the ball valve lever handle is moved into the open position, an internal
spring-loaded switch contacts the lever handle and is toggled into the secure position. When
the handle is moved from the open position, the switch extends and is toggled into the tripped
position.
The OSY-40 supervisory switch is used to monitor the open position of an OS&Y
(outside screw and yoke) type gate valve. These switches mount conveniently to most
OS&Y gate valves ranging in size from 2” to 12” (50mm to 300mm). The OSY-40 may
be used for indoor or outdoor use on automatic sprinkler systems (NFPA-13), one or
two family dwellings (NFPA-13D), residential occupancy up to four stories (NFPA-13R)
and National Fire Alarm Code (NFPA-72) service uses.
ApplicationsApplications
Backflow Preventer Accessories