Priority demand valves for BS 9251 2021                  

Position indicator

Valve fails safe in power loss/ flow/ low level

LED for power good

LED for flow switch activated

LEDs for valve position

Labelled for fitting/ wiring/ bypass/ testing 

Alarm contact 

BS 9251 2021 Priority demand valve 2.5" to 5"
priority demand valve Failsafe Butterfly[...]
Adobe Acrobat document [830.3 KB]
BS 9251 2021 PDV 3/4" to 2" with WRAS approved valve and controller
BS 9251 2021 compliant priority demand valves, WRAS approved valve with controller for mains or tank fed systems
Priority demand valve data sheet BS 9251[...]
Adobe Acrobat document [902.6 KB]

3D modelled videos of residential towers with sprinklers

Double click the two images below

 

They will open in linkedin, but you don't have to log in.

The 2 videos explain the BS9251 rules and how to fit the product, bridging the gap between the various trades involved. 

The valve is compliant with BS 9251 2021.

It is your decision if you think booster sets comply with       BS 9251 2021