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Type

Description

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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

Directional Valves
These valve are used for shifting oil flow direction of hydraulic circuit and for actuator starting/stopping as well as the
operating direction shifting of actuator.

  • 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

Directional Valves


Logic Valves

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.

Logic Valves

 


Modular Valves

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.

Modular Valves

 

 

 

 


Electro-Hydrauic Valves

Features:
  • The sensor in directional control valves is to monitor the spool position.
  • Valves without sensor are also available in both pressure control valves and directional control valves.
  • Open-loop types are also available.
  • EHDFG-04 and 06: 24V DC power supply is needed.
  • EHDFG-01, 03, 04 and 06: 0 to 5V DC command signal is needed.
  • EHDFG-04 and 06: The spool displacement is shown as a percentage.

Types:

  • Pilot Relief Valves
  • Pressure Control Valves
  • Relief Valves
  • Relieving and Reducing Valves
  • Flow Control (and Check) Valves
  • Flow Control and Relief Valves
  • High Flow Series
  • Flow Control and Relief Valves
  • Directional and Flow Control Valves
  • High Respones Type
  • Directional and Flow Control Valves

Electro-hydrauic Valves

 


High SpeedServo Valves

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Two Stage Type High Speed Linear Servo Valves

 

 

 

 

 

 

 

 

 

 

 

Linear Servo Amplifier

 

OBE (On-Board Electronics) Type Linear Servo Valves

Servo Valves

High Speed 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 Type High Speed Linear Servo Valves

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 characteristics
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 characteristics
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 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.
High flow
The valves consist of two stages to provide a high flow rate [Rated flow at ΔP = 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 characteristics
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.

 

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.

 

 

 

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.
High accurate, simple and convenient — Ideal on-board electronics type linear servo valves

Servo Valves