About the Sludge Pump
 Introducing the Marsden sludge pump concept
The Marsden Sludge Pumps have been developed to achieve the cheapest possible removal of sludge and reduce or eliminate Health, Safety or Environmental issues. The basic pumping module is a hydraulically powered piston pump with a unique simple and robust piston and valve system. Standardization of components allows multiple configurations to suit a range of situations and sludge types.
Intrinsic safety
The pumping and all controls are hydraulic powered. All rotating parts of the feeders are faced with ‘soft’ surfaces to prevent spark generation should steel components be contacted. The tracks of the Mk 3 machine are wood faced to provide maximum traction as well as protecting a painted surface or spark avoidance on a steel surface.
Hydraulic power requirements
20kw
200 Bar
30 ltr per min
Constant pressure.
Sludge pumping Volume, Head and Distance
6 to 8 cubic mtrs per hr is the nominal max vol.
Head and distance are determined by the sludge viscosity and flow characteristics. Pressures at the pump discharge can reach 25 bar.
Dismantling for Cleaning and Maintenance
The whole pump assembly is designed for rapid and simple strip down to clean, check for wear, replacement of wear pads or to clear blockages.
Debris and extraneous objects
Max diameter of a single entrained object is 40mm. Rags and gloves are known to pass thru without impediment.
High Suction
The positive displacement and positive sealing systems on piston and valves give the highest practicable suction available. This allows very thick sludge to be drawn in with out dilution. Best performance is achieved when the suction of the pump be ‘flooded’ to prevent air being drawn in and so reducing the pumping volume rate.
High Discharge pressure
Very high pump discharge pressures can be reached. Can be up to 25 bar. The actual distance and discharge head that can be pumped is entirely dependant on the characteristics of a particular sludge and the diameter of discharge hose
Feeder systems
A variety of options are available. These may be of an agitating screw type, active or passive screened, or a hopper for hand feeding. Both are primarily aimed at keeping the pump suction fully covered if the depth of sludge is not sufficient. Alternatives suction connections allow the pump to be direct coupled to a sump drain or as an inline pump.
No Dilution
Most sludge types can be pumped with zero dilution. The objective of low to zero dilution is to reduce the volume of waste that has to be treated and disposed of.
BONUS ITEM
Sludges tend to remain fluid after pumping. Due to the high pressures and high internal hydraulic ‘shear’ of the pumping action it has been found that sludges retain a fluidity sufficient for conventional pumps to handle in down stream processing situations.
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