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Hydraulic Power Unit for Submersible Pumps
Engine-driven hydraulic power unit configured to supply hydraulically driven submersible pump heads, with matched flow, pressure, and coupler arrangements for sumps, chambers, and flood control duties
The Hydraulic Power Unit for Submersible Pumps is an engine-driven hydraulic power unit designed to supply hydraulically driven submersible pump heads used in drainage, dewatering, and flood control operations. The unit integrates a 9.0 kW air-cooled gasoline engine with a variable-displacement hydraulic pump rated at 35 L/min and 210 bar, an 18-litre reservoir with 10-micron filtration, and two sets of flat-face quick couplers. Because the submersible pump head contains no electrical motor or cable, the power unit can supply pumping in sumps, chambers, and flooded spaces where electrical equipment in wet conditions is restricted. The pressure-compensated pump adjusts displacement as pump head demand changes, supporting stable pumping as water levels and discharge conditions vary. The unit can drive one or more pump heads of matched hydraulic specification, subject to the combined flow demand. The unit is suited to procurement by drainage contractors, municipal maintenance departments, and rental operators maintaining a stock of hydraulic submersible pump heads.
Matching requires the hydraulic motor displacement of the pump head, together with the required flow and head at the duty point. The power unit flow and pressure are then selected so the available supply produces the required impeller speed. Buyers should provide the pump head model, motor displacement, and duty point at inquiry stage. If the pump head specification is known but the hydraulic data is not, the supplier can typically match from the pump head model number.
Yes, provided the combined flow demand of the connected pump heads does not exceed the power unit's rated 35 L/min. Where several heads operate simultaneously, a flow divider may be required to maintain stable operation of each head. Buyers planning multi-point dewatering should specify the number of heads and their individual duty points so the distribution arrangement can be confirmed.
Hose length is limited by pressure loss and by the practical handling of the hose at the site. Longer hoses increase pressure loss in the circuit, which reduces the pressure available at the pump head motor. Buyers should provide the distance from the power unit position to each sump, and the supplier can confirm the appropriate hose length and any pressure compensation required. Hoses are supplied to the specified length at order stage.
The power unit can drive submersible pump heads from other manufacturers provided the hydraulic motor displacement, pressure rating, and coupler type are compatible with the unit's supply. Buyers should provide the pump head hydraulic motor specification and coupler type for confirmation. Where the coupler type differs, alternative couplers or adapters can be specified at order stage, subject to confirmation of compatibility and pressure rating.
The 6.5-litre fuel tank provides approximately 3.2 hours at rated load, depending on engine load and the number of pump heads being driven. Because the pump is pressure compensated, fuel consumption falls when pump heads operate against lower resistance or when fewer heads are connected, and runtime can extend beyond this figure. Buyers should confirm refuelling arrangements for extended pumping operations.
Check engine oil level before each use, and clean or replace the air filter according to the operating environment. Inspect hydraulic hoses and couplers for abrasion or leakage, and check the reservoir oil level. Hydraulic oil and return filter should be replaced at the interval specified in the maintenance schedule. For units in standby, run the engine briefly at defined intervals to confirm starting and hydraulic output.
A complete inquiry should include: the submersible pump head model and hydraulic motor specification; the required flow and head at each duty point; the number of pump heads to be driven and whether they operate simultaneously; the distance from the power unit to each sump and the required hose length; the coupler type used on the pump heads; and the expected duty cycle and runtime per shift. For fleet or rental procurement, indicate the estimated quantity and whether the specification must remain fixed across repeat orders.
