Category: Hydraulic Servo

Directly Operated Proportional Directional Valve

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Directly Operated Proportional Directional Valve

In connection with this valve, the points applicable to the following proportional directional valves will also be discussed by way of example such as hysteresis, repetition accuracy, control spool, basic principles tor characteristic curves and the time characteristics of the control spool. The proportional solenoid acts directly on the control spool in the same way …

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Stroke-Controlled Proportional Solenoid

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Stroke-Controlled Proportional Solenoid

In the case ol the stroke-controlled solenoid (Fig 10). the position of the armature is controlled by a ciosed-loop control circuit and maintained irrespective of the counter-pressure. provided it is within the rated working range of the solenoid. With the stroke-controlled solenoid, the spools of proportional directional, flow as well as pressure control valves can …

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Force-controlled Proportional Solenoid

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Force-controlled Proportional Solenoid

The solenoid force is controlled by the change in current I in the lorce-controlled solenoid without the armature of the solenoid performing a measurable stroke. Due to current feedback in the electrical amplifier, the solenoid current and therefore the solenoid force are kept constant even if resistance changes. The main feature of the force-controlled proportional …

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2-Way Proportional Throttle Valve

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This combination unit, can be used as a throttle (orifice) or in conjunction with a pressure compensator for controlling high flows The applications include, for example. control systems for presses and plastic processing machines Despite the high flow rates, the unit has a fast response time. The 2-way throttle valve is an orifice with its …

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2-Way Proportional Flow Control Valve with Downstream Pressure Compensator

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The 2-way proportional flow control valve can control, independent o’ pressure and temperature, oil flow specified by the electrical signal. The most important components are the housing (t). the proportional solenoid with inductive positional transducer (2), the measuring orifice (3). the pressure compensator (4) as well as the optionally installed non-return valve (5). The oil …

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Directly Operated Proportional Pressure Relief Valve

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The proportional pressure relief valve is designed as a poppet valve It basically consists of the housing (1), proportional solenoid (2) with inductive positional transducer (3), valve seat (4), valve poppet (5) as well as compression spring (6) The proportional solenoid is a position controlled solenoid. In this case, it replaces to a certain extent …

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Pilot Controlled Proportional Pressure Relief Valve

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Pilot controlled valves are used for applications involving higher How rates. The valve consists of the pilot valve (1) with proportional solenoid (2), optionally with integrated max. pressure safety control (3) and main valve (4) with main spool (5). The basic function corresponds to that of the “normal” pilot controlled pressure relief valve. The difference …

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Hydraulic Proportional Solenoids

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Proportional solenoids represent the linking element between electronic and hydraulic. The proportional solenoids are a form of DC linear solenoids. Proportional to the electrical current as the input variable, the produce force and travel as the output variable. Corresponding to the practical application, a differentiation is made between: – Solenoids with comparatively linear stroke/current relationship …

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