After many years of close cooperation, the Belgian Clasal took over the piston pump section from Geho ZD from WEIR Minerals Netherlands BV. With this lies design, production and distribution of the original ZD pumps in the hands of Clasal.
The GEHO ZD series is a twin-cylinder quadruple-acting crankshaft-driven piston pump. The GEHO design is purpose build contractor proven and is extremely suitable for wellpoint dewatering by gravity or vacuum and for horizontal dewatering (drainage).
Water, air or water and air mixtures are primed and discharged 4 times per crankshaft revolution. Two crankshaft driven pistons are arranged in a Vee at 90°, so that the four piston strokes for each revolution follow in regular succession. The crank timing produces a moderate pulsating type action in the dewatering line that prevents clogging of the wellpoint strainers and achieves priming from greater depths.
Pump specifications |
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Type | ZD 900 | ZD 600 | |
Design | with gear casing | with gear casing | |
Max Capacity | 95 m³/h | 65 m³/h | |
Max Discharge head | 20 m H2O | 20m H2O | |
Max Suction head | 9.6m H2O | 9.6m H2O | |
Connecting parts | 4”/6" | 4"/6” | |
Weight (empty) | Ca. 900 kg | Ca. 900 kg | |
Electric motor | 5,5 kW | 5,5 kW |
Gearbox | Tough, compact construction with integral single helical precision gears |
Lubrication | Self-contained oil splash lubrication |
Piston discs | Wear resistant high molecular polyethylene |
Cylinders | Stainless steel, easy replaceable |
Piston rod | abrasion and corrosion resistant hard surface piston rods |
Valve seats | Bronze, saltwater resistant |
Valve system | Rubber discs with stainless steel guides |
Gearbox, pump body | Alloyed cast iron |
Inspection covers | Covers at the side of the pump body for cleaning |
Cross head | Attached to the connecting rod with sleeve bearings |
Crankshaft | Antifriction type drive shaft and crankshaft bearings |
Clasal controls the complete line of production
Why a ZD pump from Clasal?