PRIORITY DEMAND VALVE FOR BS9251 2014
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 2014 rules and how to fit the product, bridging the gap between the various trades involved.
priority demand valve Failsafe Butterfly[...]
Adobe Acrobat document [2.6 MB]
Priority demand valve for compliance with BS9251 2014
priority demand valve data sheet.pdf
Adobe Acrobat document [308.3 KB]
When required this can connect to the pump flow switch/ domestic water supply so that the domestic water supply is shut off in the event of a fire.
Rules description 3.13 "valve for isolating the supply to the domestic supply in the event of sprinkler activation"
Normally closed valve, energised open- safe for the sprinklers
The valve can be used for; Booster Pump Isolation, Town main household supply shut off, priority for mains boosted sprinkler pump, pririty for sprinkler tank infill
TANK LOW LEVEL MONITORING
When installing a domestic / residential sprinkler system system tank it is a requirement of BS9251 to have float switch monitoring the water level
WRAS approved for booster sets or dedicated tanks
Rule 5.2.7 Where the cistern provides a totally dedicated water supply for sprinklers, a low level alarm should be provided
This can easily integrate into all our pumped systems, making alarm connections simple
Grifen now supply a float, including;
5m connection cable
1" or 1/2" (same device) BSP tank adaptor
FLOWST8n and DUPLIC8 have a 24vdc low level monitoring circuit as standard. The float switch can be monitored by the main control panel and alarmed on the general fault