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Dual valve should prevent stagnation

Specialist in delayed action float valves, Keraflo, has worked with Kier Construction to develop a system that ensures simultaneous filling of both sides of break and storage tanks, ensuring a constant supply of fresh water.

The benefits have recently been seen at the Garrett Anderson Centre (GAC) (pictured), a self-contained planned treatment and critical care facility within the Ipswich Hospital complex.

Keraflo said: “The problem with divided tanks is finding two independent valves to refill each side that both work simultaneously. If one opens earlier than its counterpart on the other side of the tank, and keeps up with demand, the other won’t open at all.

“One valve tending to open first leads to uneven wear, with the earlier opening valve gradually becoming looser, and the other eventually becoming stiffer, which only accentuates the differential opening rates. Issues can then occur in the static tank with bacterial growth, stagnant water, and, of course, the ever-present danger of Legionnaire’s Disease.”

With the new Keraflo Twin KP system, the two main control valves are triggered by the pilot valves; whichever pilot valve opens first then opens both control valves simultaneously, filling both sides of the tank.

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