Construction truck-mounted concrete pump 60 - 100 m³/h, max. 20.3 m | ZENITH 4ZR21

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. Main Features 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