Hydraulic selector grab circuits

IHydraulic selector grab circuits 

N D Mechanical sevices Ltd are happy to offer selector grab lines circuits to suit most makes and type selector grab ,we can supply kits to suit all types of 360 degree excavator from mini excavators to 85 ton mass excavation machine as well as back-hoe loaders .

Kits are usually sized to match correctly the hydraulic grab type ,pipe size and flow requirements .

Kits consist of in house manufactured hydraulic specification steel tubes with socket weld ends in either BSP male or female ends or SAE flange for boom and stick ,all necessary tube clamps and spacer blocks , control methods can be either hydraulic foot pedals or electronic pilot valves controlled by switches on hand levers with a load sensing pilot control system.

Case study

CAT 330/D Combined grab /hammer circuit

UK based machinery supplier required a double acting circuit ( to work a timber recovery selector grab ) with the option to change the same circuit to single acting ( for hammer operation ) for a machine sold to an overseas client .N D Mechanical services Ltd supplied a double acting grab / hammer circuit with 1" BSP feed and 1.1/4" BSP return lines matched to 330 bar grab working pressure ,fitted with change over tap to switch from double acting grab circuit / single acting hammer circuit ,secondary relief valve to set maxium operating pressure for hammer with isolation valve ,two service line relief valves to set grab maxium pressure ,grab control is by either hydraulic foot pedal or switches on right control lever with flow control on both hydraulic pumps. 

Please contact our sales department for all your selector grab circuit requiments