Yuken Products

Product Details:

These valves are double-deck directional and flow control valves employing as their pilot the electro-hydraulic proportional pressure reducing valves with two proportional solenoids. The flow rate can be controlled by changing an input current to the solenoids and the direction of the flow can be controlled by providing the current to either solenoid of the two. By combining the valves with the power amplifiers specially designed for the valves, the speed control, acceleration, deceleration and directional control can be done with a single valve, which eventually makes the hydraulic circuits simple and contributes the cost of the hydraulic systems.

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PG0-Series Gear Pumps:

• High strength aluminum extruded body.
• Hardened and ground integral gear shaft.
• Special aluminum alloy bush bearing

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Other Detail:

• High strength aluminum extruded body.
• Hardened and ground integral gear shaft.
• Special aluminum alloy bush bearing.
• Axially balanced for high volumetric efficiency in excess of 95%.
• 12 teeth design with modified profile for low noise.

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The valve can be used as a pilot valve of the Proportional Electro Hydraulic Control valves. The valve can also be used as a relief valve for the hydraulic system where a small flow rate and continuous pressure control are required

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These valves consist of a small size but high performance EH series electro-hydraulic proportional pilot relief valve and reducing valve with relief function. The valves control the system pressure proportionally through a controlled input voltage. Moreover, a good response speed in reducing the pressure even at a large load capacity can be obtained with the relief function of the valves

Product Details:

This valve consists of a small DC solenoid and a direct-acting relief valve. It serves as a pilot valve for a low flow rate hydraulic system or a proportional electro-hydraulic control valve and controls the pressure in proportion to the input current. Note that this valve is used in conjuction with the applicable power amplifier

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The electro hydraulic relief valve is designed for compactness and high efficiency. The valve provides fast proportional response to the input current. For linear pressure control a special venting feature is incorporated with good stability & low hysteresis

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Feature:

• Installation and mounting space can be minimized. No special skill is required for assembly. Any alteration/addition to the hydraulic circuit can be made quickly and easily. 
• Problems such as oil-leaks, vibration and noise which may be caused by piping are minimized, increasing the reliability of the hydraulic system.
•  Maintenance and system check-ups can be easily carried out as they are normally installed in stackable units

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Accumulators:

• Accumulators are mainly used to store pressure fluid and these are used as a hydraulic damper. Although various types of accumulators are developed today, proper selection should be made for the system. When gas charge accumulators used as an auxiliary fluid power source such as the bladder type and the piston type, demanded volume and pressure of the pre-charge gas should be examined under the adiabatic change (compression and expansion).

Piston Type Accumulators:

• Piston type accumulators may be the most reliable one, since these do not have elements which gives such damages as making the accumulator unusable in the instant, while the response speed to the given pressure change may be a little inferior to that of bladder type accumulators.

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These double pumps consist of two HPV2 series single pumps combined in tandem within a single housing and driven by a common shaft. Fluid delivered from the two-separate ports can be either supplied to separate or common circuits. These HPV pumps are designed for high-pressure functions. Suitable for mobile applications like Drill rigs, Railways & Construction Equipments

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These valves are used in a hydraulic circuit to prevent damage due to excess pressure and to adjust the max. Pressure of small capacity. Available sizes NG6 & NG10.

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Directional and Flow Control Valves

• The repeatability of the valves is obtained by having it tested independently on the conditions similar to its original testing. These valves incorporate two control functions-flow and direction-which simplify the hydraulic circuit composition and therefore the cost of the system is reduced. 

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These are proportional electro-hydraulic flow control valves having functions for controlling the direct electric current of metre-in type and for pressure control. They are energy-saving valves for supplying the minimum pressure and flow required to operate actuators.

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This valve pursues the ultimate performance of proportional electrohydraulic directional & flow control valves and make themselves to have high response feature. The closed loop is composed in the valve inside by combination of a differential transformer (LVDT) and a power amplifier. Thus, high accuracy and reliability are provided. In addition to control in the open loop, this can be used for the closed loop system as a simplified servo valve.

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These are Closed-Loop type pressure control valves controlling the system pressure from low to high in proportion to the input voltage. The stable pressure control is possible even in a small flow rate.

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These valves, consist of a small size but high performance EH series electro-hydraulic proportional pilot relief valve and a low noise type relief valve. The valves control the system pressure proportionally through a controlled input voltage.

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These valves are well accepted by industrial users as shifting time adjustable type shockless valves. By employing the basic design concept of the “G series solenoid operated directional valves”, we have been successful developing the shifting time adjustable shockless valves with high performance which makes the speed setting possible at any high speed operation. In combination with the newly developed digital amplifiers, the further enhancement of maneuverability and repeatability of the valves can be realized.

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High response, high precision and high reliability are achieved by a combination of compact and powerful solenoid and spool-position-detection LVDT. Direct type ELDFG-01/03 and two stage type ELDFHG-04/06 (which use the ELDFG-01 as a pilot) are available.

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This relief and flow control valve is an energy-saving valve that supplies the minimum pressure and flow necessary for actuator drive. Since this valve controls the pump pressure by following the load pressure while keeping the differential pressure minimized, it servers as a low power-consumption energy-saving, metre-in, controlled flow control valve. Further, since a temperature compensation function is incorporated, this valve provides consistent flow control irrespective of the fluid temperature. 

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The electro hydraulic relief valve is designed for compactness and high efficiency. The valve provides fast proportional response to the input current. For linear pressure control a special venting feature is incorporated with good stability & low hysteresis.

Product Details:

These valves are well accepted by industrial users as shifting time adjustable type shockless valves. By employing the basic design concept of the “G series solenoid operated directional valves”, we have been successful developing the shifting time adjustable shockless valves with high performance which makes the speed setting possible at any high speed operation. In combination with the newly developed digital amplifiers, the further enhancement of maneuverability and repeatability of the valves can be realized.

Product Details:

These double pumps consist of two HPV2 series single pumps combined in tandem within a single housing and driven by a common shaft. Fluid delivered from the two-separate ports can be either supplied to separate or common circuits. These HPV pumps are designed for high-pressure functions. Suitable for mobile applications like Drill rigs, Railways & Construction Equipments

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These HPV2M pumps are designed for high-pressure applications. Suitable for mobile applications like Cranes, Pressure Die Castings, Hydraulic Presses, Railways & Construction Equipments.

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