The City-pump 4ZR21 is a solid and versatile model equipped with boom 4 sections with new mixed “ZR” folding type. The pump has a minimum opening of 4,20 m and pipeline Ø 125 mm so as to be the ideal solution for city areas with difficult access where sometimes other machines have difficulties in placing and operating. The particular system of boom opening allows great handling together with many ways of use and to cast for example inside blocks of buildings, under bridges, industrial factories and galleries. The pump can easily operate also in the historical centres thanks to the assembly on truck with 2 axles with wheelbase 3.800 mm. The pumping group with opening circuit is very reliable; three typologies of “S” valve group from 60 m³/h to 100 m³/h of concrete and pressures till to 76 bar.
Self supporting frame at high torsional absorption calculated with Method of Finished Elements
Perfect assembly on 2 axles chassis
Hydraulically separated controlled stabilization: front "X" type outriggers, rear fixed type outriggers
Boom 4 sections, "ZR" folding type and pipeline Ø 125 mm (5”).
Boom control by proportional distributor
Boom minimum opening space 4.200 mm
Concrete capacity adjuster at distance
Valve S8 (upon request S6) at high performances till 100 m³/h: continuous, silent, regular pumping
Automatic lubrication system on pumping group
Total mass 16 t
Proportional remote control with engine start up and emergency stop