VA Tekniks cable driven scraper cart was very common before but still some treatment plants use them. The cart is driven by torque limited cable drums mounted on same shaft. The cart runs smoothly on wheels on the bottom of the tank and is guided on a beam which keeps it on track.
The scraper flight flips up and down with fixed stops at each end of the tank. All machines are delivered together with an electronic overload protection.
The scraper is designed for sludge transportation in sedimentation tanks at Municipal and Industrial Water and Waste Water Treatment plants. It is well placed in a chemical sludge tank.
Few moving parts, simple construction. The cables can be stretched without emptying the tank.
With the two cable drums it is possible to stretch both cables separately.