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HYDRANT
SYSTEM
 Fire
Hydrant System, the oldest and still one of the most effective
ones, consists of the following components:
- Sufficiently
large water reservoir
- Fire
pumpsets (Main and Standby)
- Jockey
pumpset
- Hydrant
valves
- Fire
fighting hoses
- Branch
pipe with nozzles
This
is a semi-automatic system. A network of pipes is laid out
depending upon the risk with hydrant valves placed at strategic
places. The spacing/distance between yard hydrants are guided
by norms viz.
- N F
P A
- Tariff
Advisory Committee
- O I
S D
- Indian
Bureau of Standards
 The
entire pipeline is kept pressurized with water. Whenever anyone
opens a hydrant valve, the pressure in the pipeline reduces
drastically and jockey pumpset which normally keeps the total
system pressurized is unable to cope with the system demand
which results in further fall in pressure.
The
further fall in pressure is sensed by the designated pressure
switch which automatically starts the main fire pumpset.
Depending
upon the type and sensitivity of the risk, diesel-engine powered
fire pumpset should also be installed having 100% standby
capacity.
System
Components:
- Landing
Valves
- Hoses
- Couplings
- Hose
Reels
- Fire
Brigade Connectors
- Branch
Pipes & Nozzles
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