Category: Proportional Electro-Hydraulic Control Valves

Yuken Proportional Electro-Hydraulic Relieving and Reducing Valves with On Board Electronics

{0 Comments}

Yuken Proportional Electro-Hydraulic Relieving and Reducing Valves with On Board Electronics

These valves are a combination of a proportional electro hydraulic pilot relief valve and a pressure reducing and relieving valve. They can control hydraulic system pressures proportionally to the controlled input voltage. As the valves have a relieving mechanism, a good response speed in reducing the pressure, even at a large load capacity, can be […]

Read More…

Yuken Proportional Electro-Hydraulic Directional and Flow Control Valves with On Board Electronics

{0 Comments}

Yuken Proportional Electro-Hydraulic Directional and Flow Control Valves with On Board Electronics

These valves are a combination of a directional and flow control valve and a power amplifier. The flow rate can be controlled by changing an input voltage to the solenoids, and the direction of the flow can be controlled by providing the current to either of the two solenoids. This type of valve is highly […]

Read More…

Hybrid Proportional Electro-Hydraulic Control Valves

{0 Comments}

These valves contain a combination of an amplifier-integrated proportional valve, pressure sensor, and displacement sensor in order to improve the functionality and ease of use. They have a closed minor feedback loop that greatly improves pressure control linearity, hysteresis, and stability. The valves offer the following features. (1) With a hydraulic power source, DC 24 […]

Read More…

Circuit Examples of Proportional Electro-hydraulic Control Valves

{0 Comments}

Circuit Examples of Proportional Electro-hydraulic Control Valves

Figures 8.14 and 8.15 compare circuits equipped with the general hydraulic control valves and the proportional electro-hydraulic control valves. As is evident from the figures, the proportional electro-hydraulic control valves can generally replace many of control valves in hydraulic systems. Also, they simplify the circuit and the system sequence, bringing about easier maintenance and management. […]

Read More…

Power Amplifiers For Proportional Electro-Hydraulic Control Valves

{0 Comments}

Power Amplifiers For Proportional Electro-Hydraulic Control Valves

Amplifiers serve as a drive for the proportional electro-hydraulic control valves. They convert signal voltage from a setting adjuster to a current. Then, they amplify and feed the current to the solenoid to operate the valves for pressure and flow control. The available types of the amplifiers are: DC input, DC input feedback, slow up-down, […]

Read More…

Proportional Electro-Hydraulic Directional and Flow Control Valves

{0 Comments}

Proportional Electro-Hydraulic Directional and Flow Control Valves

These valves accommodate flow and direction control functions for an actuator. 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 of the two solenoids. These valves have linear variable differential transformers for detection of the […]

Read More…

Proportional Electro-Hydraulic Flow Control and Relief Valves

{0 Comments}

Proportional Electro-Hydraulic Flow Control and Relief Valves

These valves facilitate energy-saving operation of hydraulic systems by supplying the minimum pressure and flow required to drive the actuators. These valves control the pump pressure effectively by responding to a small pressure difference against the load pressure. They could be described as energy-saving meter-in type flow control valves that can be operated at low […]

Read More…

Proportional Electro-Hydraulic Relieving and Reducing Valves

{0 Comments}

Proportional Electro-Hydraulic Relieving and Reducing Valves

These valves consist of a proportional electro-hydraulic pilot relief valve and a pressure reducing and relieving valve. They can control the system pressure continuously through a controlled input current to the DC solenoid. Because the valves have a relieving mechanism, a good response speed in reducing the pressure even at a large load capacity can […]

Read More…