Hydro-pneumatic pumpsets
AssigneeAction Pumping Services Ltd.
InventorStephen J. Hockley
Life of this patent
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Abstract
A packaged hydro-pneumatic pumpset system in which a plurality of pumps JI, M2, M3 are brought into operation sequentially as water pressure in the system drops below pre-set values. The system includes an accumulator 6 for storing water to maintain pressure in the system when the pumps are not operating and a prime is maintained on the pumps by means of a footvalve in the suction pipe inlet. The system also includes a second accumulator 9, which is connected to the first and which is arranged, when the pumps are inoperative, to maintain a reservoir of stored pressurized water in the suction manifold.
Claims5
A packaged hydro-pneumatic pumpset system including a plurality of pumps connected to suction and discharge manifolds and arranged to be brought into operation sequentially when required in response to actuation of respective pressure switches, a footvalve in the suction pipe inlet to maintain a prime on the pumps and an hydraulic accumulator arranged to store water such as to maintain pressure in the system when the pumps are not operating, characterised in that a second hydraulic accumulator is included in the system and connected to the first accumulator via a non-return valve and to the suction manifold of the pumps via means arranged to be actuated when all the pumps are inoperative, to maintain a reservoir of stored pressurised water in the suction manifold to assist the footvalve to form a positive seal by remaining closed on its seating.
Dependencies are inferred from the claim text.