MOV - Hydraulic operation
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DESCRIPTION The AMCA proportional directional control valves are pressure compensated and archieve an ideal control of force, speed, acceleration and deceleration, independent of the load and increased demands. The pressure compensator could be a pressure relief valve (MUV) or a pressure reducing valve (MDM), together with the throttling function of one or more directional control valve spools. The shape of the proportional directional control valve spool differs from the conventional one. The result is a progressive flow curve. To make optimal use of the maximum stroke of the spool, the flow angles of the A and/or B port can be defined for different flows. For a constant flow, the pressuredrop over the orifice of the spool remains constant, independent of the load pressure. 2-types of joystick control: FEATURES The load independent output flow is proportional to the input signal (control pressure). The pump pressure always corresponds to the user pressure, +3,6,8 or 12 bar (43, 86, 114 or 172 psi) Äp compensator. The built-in pump-unloading valve results in: - very low power turned into heat; - minimum loading of the prime mover. User speed is precisely controlled under all load conditions. Progressive regulating curve; no pressure peaks when switching; sensitive control even for alternating pressures. Constant working speed of differential cylinders at the different regulating flow to the valve by grinding angle. Constant recirculation pressure independent of the number of units. Any limiting of flow for every user port. Proportional directional control valves also available as: - Manual proportional series MHV and - Electrical proportional series MEV. Any combination of these control options is possible. The sandwich and subplate system allows a construction up to 8 control valves. Electrical pressure cut off at port A, B or A and B, available on request. Sandwich version Subplate version PROPORTIONAL DIRECTIONAL CONTROL VALVE Series MOV Hydraulically operated AMCA HYDRAULIC FLUID POWER BV P.O.BOX 18, 9790 AA Ten Boer B.Kuiperweg 33, 9792 PJ Ten Post The Netherlands Tel. : +31 (0)50 – 3023577 e-mail: sales@amca-nl.com Fax.: +31 (0)50 – 3021226 homepage: http://www.amca-nl.com Publ. L-MOV-E-02/06

3/3 way 3/2 way 3/2 way 4/2 way 4/2 way Symbols 0 4/3 way 4/2 way 4/3 way P A P A P 4/3 way 4/3 way a A A P A types Spool A+B - T, 70% of nominal bore P - B and A - T, In neutral position, 20% of nominal 20% of nominal T B T B T bore ) bore B - T, ) Operation Characteristic In neutral position all In neutral position, In neutral position, ports blocked 20% of nominal b B B T B bore A - T, ) ) recirculation at low pressure only with MUV Operation Characteristic In neutral position all ports blocked In neutral position, 20% of nominal Port A out of function position a additional Port A out of...