towable hydraulic pivot
The towable hydraulic central unit is a compact pyramid structure made of galvanized steel, with two belts on each side in 4 mm thick pipe, this structure reduces the volume of concrete slab to preserve more cultivated surface. It is equipped with a three-point tractor hitch and a tower with detachable wheels, which allows it to move from one position to another. Sealing by rotating connection on vertical pipe provided by lip seal at low pressures. Device without need of electricity, one span maximum in ST141 length 56 m or 62 m with a overhang of 24 m or 30 m. Flow rate to be respected from 33 m3/h to 80 m3/h and pressure from 4.3 bar to 6 bar.
The pivot point is the center of the irrigated circle. Its function is to keep the span in the parcel center. Hence, it must withstand two main forces: a traction force of the moving spans and the weight of the first span. Besides the single resistance of each element of the pivot point, the global structural resistance of the assembly is essential. For this reason, Otech uses S275 top-quality steel and a NF EN ISO 1461 galvanisation to get a tried and tested structure, composed of an electric management system in compliance with the NF EN909 February 2009 + A1.
Central Element
As standard, coupling with the first IP233 anti-UV watertight, span relieve pressures on the upper elbow for tough grounds. Galvanised steel coupler to protect two low-pressure lip seals against environmental threats (UV, sandstorms, etc.).
