VALVES
Below are flagship Valves by YUKEN.
Click on the buttons below to proceed to their respective sections.
PRESSURE CONTROL VALVES
OVERVIEW
Pressure Control Valves
Various type of pressure control valves are available, from relief valves to pressure switches, to control the pressure at a desired level in the hydraulic system.
FLOW CONTROL VALVES
OVERVIEW
Flow Control Valves
These valves control the reciprocating and rotating speed of hydraulic actuators, A variety of flow control valves including pressure and/or temperature-compensated flow control valves are available.
DIRECTIONAL CONTROL VALVES
- OVERVIEW
- SOLENOID OPERATED
- SOLENOID CONTROLLED PILOT OPERATED
- 'G' SERIES SHOCKLESS
- PILOT/MANUALLY/MECHANICALLY OPERATED
- POPPET
- CHECK/PILOT CONTROLLED CHECK
OVERVIEW
Directional Control Valves
These valves control the flow direction in the hydraulic circuit. The various directional valves ranging from the solenoid operated directional valves to the check valves which conform to JFPS Standard (The Japan Fluid Power Standard) are available to meet the variety in customer’s needs.
- Solenoid Operated Directional Valves
- Solenoid Controlled Pilot Operated Directional Valves
- “G” Series Shockless Type Directional Valves
- Pilot/Manually/Mechanically Operated Directional Valves
- Poppet Type Directional Valves
- Check/Pilot Controlled Check Valves
SOLENOID OPERATED
Solenoid Operated Directional Valves
These DSG-005 series solenoid directional valves are the products newly developed as a “Mini-series”. Compared with DSG-01 series, the valve are much more compactly manufactured but enjoy a maximum operating pressure of 25 MPa (3630 PSI) and a maximum flow rate of 15 L/min (3.96 U.S.GPM), while contributing further to a space saving requirement. Moreover, using wet armature solenoids, the valves ensure the long life.
SOLENOID CONTROLLED PILOT OPERATED
Solenoid Controlled Pilot Operated Directional Valves
These valves are composed of a solenoid operated pilot valve and a pilot operated slave valve. When a solenoid is energised the pilot valve directs the flow to move the spool of the slave valve, thus changing the direction of flow in the hydraulic circuit.
FEATURES
- High Pressure & High Flow
High pressure (31.5 MPa (4570 PSI)) along which high flow means compact system design.
- Low Pressure Drop
System energy saving increased as pressure drop of each valve has been greatly reduced.
'G' SERIES SHOCKLESS
“G” Series Shockless Type Solenoid Operated Directional Valves
“G” Series Shockless Type Solenoid Controlled Pilot Operated Directional Valves
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PILOT/MANUALLY/MECHANICALLY OPERATED
Pilot/Manually/Mechanically Operated Directional Valves
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POPPET
Poppet Type Directional Valves
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CHECK/PILOT CONTROLLED CHECK
Check/Pilot Controlled Check Directional Valves
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LOGIC VALVES
OVERVIEW
Logic Valves
Yuken Logic Valves comprise cartridge typed elements and covers with pilot passages. Various types may be combined for direction, flow rate and pressure control.
Yuken Logic Valves can be incorporated in manifold blocks to form optimum integrated hydraulic circuits and compact hydraulic power units. Being a poppet type, the elements permit high-pressure, high flow rates, high speed and shockless shifting with low pressure drop.
Typical applications include steel mill machines, injection moulding machines, machine tools and so on. In addition, Yuken Logic Valves cavity specifications conform to ISO standards.
FEATURES
- Multifunction performance in terms of direction, flow and pressure can be obtained by combining elements and covers.
- Poppet-type elements virtually eliminate internal leakage and hydraulic locking. Because there are no overlaps, response times are very high, permitting high-speed shifting.
- For high pressure, large capacity systems, optimum performance is achieved with low pressure losses.
- Since the logic valves are directly incorporated in cavities provided in blocks, the system is free from problems related to piping such as oil leakage, vibration and noise, and higher reliability is achieved.
- Multi-function logic valves permit compact integrated hydraulic systems which reduce manifold dimensions and mass and achieve lower cost conventional types.
SERVO VALVES
OVERVIEW
Linear Servo Valves
High-speed linear servo valves have outstanding features of high response and exceptional contamination resistance. These features are achieved by the compact and powerful linear motor which directly drives the spool and gives electric feedback of the spool position. These valves have garnered an excellent reputation since their launch by Yuken in 2001. Direct type LSVG-03 and two stage type LSVHG-04/06/10 (which use the LSVG-03 as a pilot) are available.
DIRECT
Direct Type High Speed Linear Servo Valves
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FEATURES
- High Accuracy
These valves have a low hysteresis of 0.1 % or less, achieving high accuracy. They allow the main unit to operate with much higher repeatability.
- High Response
The valves provide significantly high levels of step and frequency responses, which are typically used as measures of response characteristics; the step response is 2 ms (0-100%)*, and the frequency response is 450 Hz/- 90° (±25 % amplitude)*. Thus, the valves ensure that the main unit can achieve unprecedented high response. (*: Representative values)
- Excellent Vibration-Proof
With a simple structure, the valves offer high vibration resistance.
- Excellent Contamination Resistance
The valves are also featured by excellent contamination resistance since they have a simple structure that directly connects the linear motor moving coil, the spool, and the position sensor. Compared to conventional servo valves for which the permissible contamination level is up to NAS 1638 class 7, the direct type linear servo valves can accept the contamination level of up to NAS 1638 class 10. These valves can contribute to greatly reducing the cost of fluid management.
TWO STAGE
Two Stage Type High Speed Linear Servo Valves
Two stage type linear servo valves are a type of high-flow servo valve that has a direct type high-speed linear servo valve in its pilot stage to drive the main spool.
These valves control the positions of the pilot and main spools with electrical feedback, achieving high accuracy and response.
FEATURES
- High Flow
The valves consist of two stages to provide a high flow rate (Rated flow at ∆ P = 7 MPa (1020 PSI): 750 to 1500 L/min (198 to 396 U.S.GPM)).
- High Accuracy
The valves have a low hysteresis of 0.1 % or less, achieving high accuracy. They allow the main unit to operate with much higher repeatability.
- High Response
The valves provide significantly high levels of step and frequency responses, which are typically used as measures of response characteristics; the step response is 8 ms (0-100 %), and the frequency response is 100 Hz/- 90° (±25 % amplitude) (Representative values for LSVHG-10-1500). Thus, the valves ensure the achievement of unprecedented high response.
- Excellent Contamination Resistance
As is the case with the direct type linear servo valves, the permissible level of fluid contamination for these valves is up to NAS 1638 class 10.
OBE
On-Board Electronics Type Linear Servo Valves
On-board electronics type linear servo valves have been developed based on high-speed linear servo valves, but with a focus on downsizing the pilot valve. The integration of the exclusive amplifier and the linear servo valve create a high performance valve in a compact package which greatly improves user-friendliness.
FEATURES
- High Accuracy
Closed loop control by the combination of the position sensors for the pilot valve and the main valve in the compact amplifiers ensures excellent linearity, hysteresis and stability on control.
- Convenient
Fault diagnosis is easy to conduct with the alarm indication when the command signal and the spool position differ due to abnormality in the system.
- Simple
Highly accurate hydraulic control can be obtained only by supplying 24V DC power and inputting a command signal.
AMPLIFIER
Linear Servo Amplifier
This amplifier is used to drive LSVG/LSVHG series high speed linear servo valves. With an optimal design for the servo valves, the amplifier can maximize the valve performance.
MODULAR VALVES
OVERVIEW
Modular Valves
YUKEN’s Modular Valves are stack type valves, and require no piping. They not only rationalise system build, but they also meet the technical requirements for a variety of hydraulic systems. Stacking systems is a new era in hydraulics.
The valves have standardized mounting surface conforming to ISO 4401 and optimum thickness for each size. Any hydraulic circuits can be easily composed by stacking the valves with mounting bolts. The valves can be used widely for hydraulic systems for various industries such as machine tools, special purpose machines, ships and steel mill equipment.
FEATURES
- Installation and mounting space can be minimized.
- No special skill is required for assembly and any addition or alteration of 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.
005 SERIES
005 Series Modular Valves
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01 SERIES
01 Series Modular Valves
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03 SERIES
03 Series Modular Valves
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06 SERIES
06 Series Modular Valves
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10 SERIES
10 Series Modular Valves
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PROPORTIONAL ELECTRO-HYDRAULIC CONTROL VALVES
OVERVIEW
Proportional Electro-Hydraulic Control Valves
Proportional valves are able to control the system pressure or flow proportionally through a controlled input current from the amplifier. Our product line includes “high response type valves” that provide ultimately improved response using closed loop control that proportional control valves can offer.
- “EH” Series Proportional Electro-Hydraulic Control Valves
- “E” Series Proportional Electro-Hydraulic Control Valves
- Power Amplifiers
- Setting Adjusters
'EH' SERIES
“EH” Series Proportional Electro-Hydraulic Control Valves
The EH Series on-board electronic proportional controls are compound electro-hydraulic products which merge the latest electronic and sensor technology with Yuken’s reputable E Series proportional controls. Yuken has realized an industry leading position by creating compact hydraulic equipment that features high precision and reliability by unifying the amplifier, and sensor, all of which are required for proportional or servo control systems.
FEATURES
- High Accuracy
The power amplifier and pressure sensor are integrated in the control valve; greatly improves the linearity, hysteresis and stability in control pressure.
- Simple
Highly accurate hydraulic control can be obtained only by supplying 24 V DC power and inputting a command signal voltage of 0 to 5 V.
- Convenient
Analog voltages can be output by using the incorporated sensor for monitoring pressure, etc. Pressure can be displayed remotely with the indicators obtainable in the market and also can be transmitted into a computer.
'E' SERIES
“E” Series Proportional Electro-Hydraulic Control Valves
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POWER AMPLIFIERS
Power Amplifiers
These power amplifiers are used to drive proportional electro-hydraulic pressure or flow control valves.
SETTING ADJUSTERS
Setting Adjusters
The setting adjuster supplies the command signal voltage to the power amplifier. Since the setting adjuster is closely related to actual machine operating procedure, the user generally provides this device. Yuken makes the following standard setting adjusters for general use and designs and manufactures special setting adjusters to order.
