Hydraulic Power Unit (HPU) For ACC Screw Press Hydraulic System

ACC Screw Press operated by sensing input signal (amp) from the main gearbox electric motor and feedback electronically to control card in the electrical control box. Manual override is also included by means of manual control valve to continue production.

This system suits all makes of new or existing screw presses fitted with conventional motor - gearbox main drives.

Principle of operation :- The hydraulic system run continuously, exerting a constant pressure on the reaction cone through the hydraulic cylinder.

Pressure level is pre-determined by the relief valve setting which is adjustable to suit varying fruit conditions.

When screw press overloads, rising current of main electric motor automatically triggers an over-current relay to switch ‘on’ a solenoid valve to reduce hydraulic pressure. Cones are then pushed backwards, permitting faster discharge of press cake.

As overloading diminishes, the falling of main electric motor current reaches a safe level, automatically triggers the over-current relay to switch ‘off’ solenoid valve. Cones advance once more, re-asserting pressure at the original level.