Foam Bladder Tank, Pressure Type Foam Proportioning Unit (PHYM )
bladder tank is used to provide foam solution for foam system. It
mainly consists of pressure tank, rubber bladder, proportioner, control
valves, pressure gauge and pipelines. High-pressure water is needed to
swap out foam concentrate from bladder in the tank as a certain
proportion. Foam concentrate then mixed with pressurized water and
become foam solution. Bladder is separated from pressurized water that
it can be utilized next time if not finished. Besides, there is feed
inlet to refill or change foam concentrate for the tank.
pressurized water flows through foam proportioner, a small part of
water (3%~6%) flows into tank from water inlet and press bladder to swap
out equal foam concentrate and then mix with another part of water
(97%~94%) in proportioner. Foam solution flows out from proportioner
outlet and was distribute to pipelines.
unit usually constitutes foam spray system and low/high expansion foam
extinguishing system with pipelines, foam generators or foam nozzles.
This unit provides foam solution for these systems through pipelines
which are distributed in all destination areas and they are connected
with generators or foam nozzles. The system works once a fire happens
somewhere and solution was transported to destination area through
pipelines. Thus destination area gets foam solution to put out fire by
foam generators or foam nozzles.