Electro-hydraulic Hydraulic Valves
Description
Electro-hydraulic hydraulic valves are devices that control the flow and pressure of hydraulic fluid within a system. They are integral components in systems that require precise control of hydraulic fluid to achieve desired motion or force outputs. These valves are typically part of a larger electro-hydraulic system that combines electronic controls with hydraulic power to enhance performance and accuracy.
Working Principle
Electro-hydraulic valves operate by using electric command signals to control a servo valve, which in turn regulates the amount of hydraulic fluid delivered to an actuator. This setup allows for precise control of fluid flow and pressure, enabling the system to produce high forces with minimal backlash. The integration of electronic controls, such as transducers and feedback systems, ensures that the valves can adjust fluid flow accurately and efficiently, making them highly useful in applications requiring precision and reliability.
Applications
Electro-hydraulic valves are used in a variety of applications where precise control of hydraulic fluid is necessary. Specific examples include:
- Aircraft Control Systems: Electro-hydraulic valves are used in aircraft to control surfaces, providing the necessary force and precision for maneuvering.
- Industrial Machinery: These valves are employed in machine tools and precision motion control applications, where accurate positioning and force control are critical.
- Hydropower Generation: Electro-hydraulic systems are used to control valves in steam turbines, ensuring efficient operation and energy production.
Advantages over other Hydraulic Valves
Electro-hydraulic valves offer several advantages over traditional hydraulic valves:
- Precision and Accuracy: The integration of electronic feedback systems allows for highly accurate control of fluid flow and pressure, which is essential in applications requiring precise motion control.
- High Force Output: These valves can produce very high forces with minimal backlash, making them suitable for demanding applications such as aircraft control systems.
- Flexibility: The ability to integrate with various electronic components allows for customization and adaptability in different applications.
Limitations
Despite their advantages, electro-hydraulic valves have some limitations:
- Cost: These systems can be costly due to the complexity of integrating electronic controls with hydraulic components.
- Maintenance: The need for regular maintenance is higher due to the potential for oil leaks and the requirement to recirculate hydraulic fluid.
- Temperature Sensitivity: Electro-hydraulic systems can be affected by low ambient temperatures, which may impact performance if precautions are not taken.
Considerations
When considering the use of electro-hydraulic valves, several factors should be taken into account:
- Initial Costs: The upfront investment can be significant due to the complexity and integration of electronic and hydraulic components.
- Operating Expenses: Maintenance costs can be higher due to the need for regular servicing and potential issues such as oil leaks.
- Durability and Accuracy: While these systems offer high precision, their durability can be impacted by environmental factors and the quality of maintenance.
- Replacement and Maintenance Costs: Regular maintenance is essential to ensure optimal performance, and replacement parts can be expensive due to the specialized nature of the components.
from Radwell International
DIRECTIONAL SPOOL VALVE, PILOT OPERATED, WITH HYDRAULIC OR ELECTRO-HYDRAULIC ACTUATION, (4WEH 10 J4X/6EG24N9ETS2DK35L/B08 SO8). FREE 2 YEAR RADWELL WARRANTY [See More]
- Actuation: ElectroHydraulic
- Valve Type: Spool; Hydraulic; Pilot
from Radwell International
DIRECTIONAL ELECTRO-HYDRAULIC VALVE WITH SOLENOID, 63 SERIES, SPRING RETURN, CONCEALED MANUAL OVERRIDE,INTERNAL PILOT OIL SUPPLY, EXTERNAL PILOT OIL RETURN, SUPPLY CONTROL SWITCHING TIME ADJUSTMENT, 350BAR, 4WAY, NG25, 110V. FREE 2 YEAR RADWELL WARRANTY [See More]
- Actuation: ElectroHydraulic
- Valve Type: Solenoid; Control Valve; Hydraulic; Pilot
from Radwell International
DIRECTIONAL ELECTRO-HYDRAULIC VALVE WITH SOLENOID, NG25, 3 SPOOL POSITIONS, 63 COMPONENT SERIES, 4 WAY, CONCEALED MANUAL OVERRIDE, INTERNAL PILOT OIL SUPPLY, EXTERNAL PILOT OIL RETURN, DISCHARGE CONTROL SWITCHING TIME ADJUSTMENT, 350BAR, 110V 50/60HZ, . FREE 2 YEAR RADWELL WARRANTY [See More]
- Actuation: ElectroHydraulic
- Valve Type: Solenoid; Spool; Control Valve; Hydraulic; Pilot
from Radwell International
PROPORTIONAL VALVE, PROPORTIONAL ELECTRO-HYDRAULIC PILOT RELIEF VALVES, 24.5MPA, 24V DC, 28W, STANDARD ORIFICE, . FREE 2 YEAR RADWELL WARRANTY [See More]
- Actuation: ElectroHydraulic
- Valve Type: Hydraulic; Pilot; Relief; Anti-Siphon
from Radwell International
ESD SERIES, ELECTRO-HYDRAULIC PROPORTIONAL RELIEF AND FLOW CONTROL VALVE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Actuation: ElectroHydraulic
- Valve Type: Control Valve; Hydraulic; Relief; Anti-Siphon
from Atos North America
Hydraulic operated directional valves are spool type, three or four way, two or three position, designed to operate in oil hydraulic systems. Available with single or double hydraulic actuator. [See More]
- Actuation: ElectroHydraulic
- Valve Size: 0.24 to 1.26
- Valve Type: Spool; Directional; Hydraulic
- Maximum Pressure: 5076.32
from Western Integrated Technologies
Flow-sharing for improved productivity, safety and operator comfot. Load-sense pressure compensated for improved system efficiency and fuel savings. Modular design enables better match between cost and value. Low loop pressure drops for reduced horsepower consumption. Low pressure regeneration to... [See More]
- Actuation: Manual; ElectroHydraulic; ElectroPneumatic; Pneumatic
- Maximum Pressure: 5000.00
- Valve Type: Control Valve; Directional; Hydraulic
- Number of Ports: 3 to 4
from HydraForce, Inc.
A proportional solenoid-operated, 2-way, poppet-type, normally open, screw-in hydraulic cartridge valve for low-leakage load-holding applications and for starting or stopping a load or a pump system. [See More]
- Actuation: Manual (optional feature); ElectroHydraulic; Pilot
- Valve Size: 0.25 to 0.38
- Valve Type: Cartridge; Poppet; Solenoid; Directional; Hydraulic
- Maximum Pressure: 3000.00
from HAWE North America Inc.
The SE and SEH type flow control valves are intended for smooth velocity control of hydraulic actuators independent of pressure. They may be utilized as 2-way or 3-way flow control valves and are available with an adjustable metering orifice. The adjustment of this orifice is either directly... [See More]
- Actuation: ElectroHydraulic; Electro-proportional
- Maximum Pressure: 4568.69
- Valve Type: Control Valve; Hydraulic
- Number of Ports: 2
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 3.94
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 580.15
from DME Company
Temperature Actuated Regulating Valve. • Excellent flow characteristics. • Maintain oil temperature thru heat exchanger Thermostatic COOLING CONTROL valve. • Built for the most rugged machine tool and hydraulic applications. • Six temperature ranges to meet your requirements. [See More]
- Actuation: ElectroHydraulic; Thermally
- Valve Size: 0.38 to 2.50
- Valve Type: Hydraulic; Regulator; Regulating Valve
- Maximum Pressure: 0.00 to 150.00
from IBT Industrial Solutions
IBT Industrial Solutions is the expert in hydraulics products and hydraulic solutions. Our experience in fluid power and our wide array of hydraulics products will lead you to the best hydraulics solution for your business. We provide solutions to companies in various industries that rely on mobile... [See More]
- Actuation: Manual; ElectroHydraulic
- Valve Type: Check; Needle; Solenoid; Control Valve; Hydraulic; Relief
from Eaton Hydraulics Group
AxisPro Proportional Valves. Smarter. Faster. Easier. AxisPro ® Proportional Valves from Eaton. In today's competitive environment, manufacturers need to build machines that maximize efficiency, reliability and throughput for their customers. And they're developing smart machines to do it. As... [See More]
- Actuation: ElectroHydraulic
- Maximum Pressure: 5000.00
- Valve Type: Hydraulic
from Vektek, LLC
Efficient control solutions for single acting systems. 2 Position 3 Port manual valve is equipped with colored bonnet to differentiate it from the 3 position 4 port. Shear style valve design features hardened steel poppets and aluminum body. Low restriction design generates a pressure drop of less... [See More]
- Actuation: ElectroHydraulic
- Number of Ports: 3
- Valve Type: Solenoid; Control Valve; Hydraulic
- Positions: 2
from Atos North America
LIM, LIR, and LIC are pressure control valves composed by a 2-way cartridge housed in a standard recess and by a functional "cover". The cartridge is composed by a poppet hydraulically piloted by means of internal connections in the cover and sliding into a drilled sleeve; cracking pressure value... [See More]
- Actuation: ElectroHydraulic
- Valve Size: 0.63 to 3.15
- Valve Type: Cartridge; Control Valve; Hydraulic; Relief
- Maximum Pressure: 5076.32
from HydraForce, Inc.
A pressure-compensated electrically-variable three-port flow regulator that is a priority (bypass) type control. This combination valve uses a PV70-33x proportional cartridge and an EC10-40 compensator. [See More]
- Actuation: ElectroHydraulic
- Maximum Pressure: 0.00 to 3000.00
- Valve Type: Cartridge; Solenoid; Spool; Hydraulic
- Number of Ports: 2
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 4.92
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 580.15
from Eaton Hydraulics Group
Sectional CMX100 & CMX160 Valves. Eaton is dedicated to helping develop the most advanced and powerful hydraulic systems in the industry —but never at the cost of smooth, reliable control. With modular Eaton sectional CMX100 and CMX160 valves, engineers don ’t need to sacrifice... [See More]
- Actuation: ElectroHydraulic
- Maximum Pressure: 3625.00 to 5510.00
- Valve Type: Control Valve; Hydraulic
from Vektek, LLC
Efficient control solutions for Single Acting Systems. Equipped with color bonnet to differentiate from the 3-Position 4-Port model. Shear Style valve design features hardened steel poppets and cast steel design. [See More]
- Actuation: ElectroHydraulic
- Number of Ports: 3
- Valve Type: Solenoid; Control Valve; Hydraulic
- Positions: 2
from HydraForce, Inc.
A solenoid-operated, normally-closed, on/off, poppet-type, screw-in hydraulic cartridge. valve incorporating an integral load-sense pressure port with isolation check. FEATURES. • Continuous-duty rated coil. • Hardened precision seat for long life and low leakage. • Optional coil... [See More]
- Actuation: ElectroHydraulic
- Maximum Pressure: 3625.94
- Valve Type: Cartridge; Directional; Hydraulic
- Number of Ports: 3
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 2.56
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 600.00
from Vektek, LLC
These valves offer the features required to efficiently control a double acting workholding system. (They may also be used to control single acting systems working in opposition.). Valves incorporate extremely low leakage (4 drops per minute per seal) pressure balanced shear type poppet designs. [See More]
- Actuation: ElectroHydraulic
- Number of Ports: 4
- Valve Type: Solenoid; Control Valve; Hydraulic
- Positions: 3
from HydraForce, Inc.
A solenoid-operated, 2-way, normally closed, direct-acting, poppet-type,. bi-directional blocking, screw-in hydraulic cartridge valve, designed for low leakage in load-holding applications. [See More]
- Actuation: Manual (optional feature); ElectroHydraulic
- Valve Size: 0.38
- Valve Type: Check; Lift Check; Cartridge; Poppet; Directional; Hydraulic
- Maximum Pressure: 3002.28
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 3.15
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 600.00
from HydraForce, Inc.
A proportional solenoid-operated, 2-way, poppet-type, normally closed, screw-in hydraulic cartridge valve for low-leakage blocking and load-holding applications. [See More]
- Actuation: Manual (optional feature); ElectroHydraulic; Pilot
- Valve Size: 0.75 to 1.00
- Valve Type: Cartridge; Poppet; Directional; Hydraulic; Metering; Pilot
- Maximum Pressure: 3625.94
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 3.94
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 580.15
from HydraForce, Inc.
SPCL16-30 valves are electrically-proportional, low-leakage poppet valves with integral load-sensing check valve capability. The proportional poppet design allows for accurate electro-hydraulic system control for a wide range of load sensing applications. [See More]
- Actuation: ElectroHydraulic; Pilot
- Maximum Pressure: 3625.94
- Valve Type: Double Check; Lift Check; Poppet; Control Valve; Directional; Hydraulic; Pilot
- Number of Ports: 3
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 4.92
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 580.15
from HydraForce, Inc.
A solenoid-operated, normally-closed, on/off, poppet-type, screw-in hydraulic. cartridge valve incorporating an integral load-sense pressure port with isolation check. [See More]
- Actuation: ElectroHydraulic
- Valve Size: 0.38
- Valve Type: Check; Lift Check; Cartridge; Poppet; Control Valve; Directional; Hydraulic; Pilot
- Maximum Pressure: 3480.90
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 2.56
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 600.00
from HydraForce, Inc.
A screw-in, cartridge-style, direct acting, poppet-type hydraulic relief valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. This valve is intended for use as a pressure limiting device in demanding... [See More]
- Actuation: ElectroHydraulic
- Valve Size: 0.25 to 0.38
- Valve Type: Cartridge; Poppet; Hydraulic; Pilot
- Maximum Pressure: 6200.36
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 3.15
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 600.00
from HydraForce, Inc.
A solenoid-operated, two-way, normally closed, electro-proportional, hydraulic cartridge valve intended for use with an external pressure compensator or load-sensing-style pump control. [See More]
- Actuation: ElectroHydraulic; Pilot
- Valve Size: 0.75 to 1.00
- Valve Type: Cartridge; Spool; Hydraulic; Pilot
- Maximum Pressure: 0.00 to 3500.00
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 0.59
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 1500.00
from HydraForce, Inc.
A direct-acting, spool-type, drop-in-style, flange-mounted, pressure reducing/relieving valve, which can be infinitely adjusted across a prescribed range using a variable electric input. Pressure output is proportional to DC current input. The Ecoil is an integral part of the valve assembly, and... [See More]
- Actuation: Manual (optional feature); ElectroHydraulic; Pilot
- Maximum Pressure: 0.00 to 1500.00
- Valve Type: Cartridge; Spool; Control Valve; Hydraulic; Pilot; Relief
- Number of Ports: 3
from co-ax valves inc.
Function: pressure balanced 2/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 0.39
- Valve Type: Balancing; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 1500.00
from HydraForce, Inc.
A solenoid-operated, two-position, four-way, direct-acting spool-type, screw-in hydraulic cartridge valve. [See More]
- Actuation: Manual (optional feature); ElectroHydraulic
- Valve Size: 0.75
- Valve Type: Cartridge; Spool; Directional; Hydraulic
- Maximum Pressure: 3480.90
from co-ax valves inc.
Function: pressure balanced 3/2 way externally controlled coaxial valves, normally closed and normally open versions. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, aggressive, coolant. Body Materials: aluminum, brass, galvanized steel, nickel plated brass, nickel plated... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 0.39
- Valve Type: Balancing; Control Valve; Diverter; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 960.00
from HydraForce, Inc.
Spool, 2-Way, Normally Open with Internal Relief [See More]
- Actuation: ElectroHydraulic; Pilot
- Maximum Pressure: 4307.62
- Valve Type: Cartridge; Spool; Directional; Hydraulic; Pilot
- Number of Ports: 2
from co-ax valves inc.
Function: pressure balanced 2/2 or 3/2 way cartridge valves externally controlled or direct acting, normally closed version. Media: gaseous, liquid, gelatinous, highly viscous, pasty, contaminated, abrasive. Body Materials: aluminum, brass, stainless steel. Options: valve body, limit switches,... [See More]
- Actuation: ElectroHydraulic; ElectroPneumatic; Pilot; Pneumatic
- Valve Size: 0.39
- Valve Type: Cartridge; Control Valve; Drain; Hydraulic; Metering; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 750.00
from HydraForce, Inc.
A solenoid-operated, five-way, three-position, proportional, screw-in hydraulic. cartridge valve with integral load-sense port. [See More]
- Actuation: Manual (optional feature); ElectroHydraulic
- Maximum Pressure: 3500.00
- Valve Type: Cartridge; Solenoid; Spool; Control Valve; Directional; Hydraulic
- Number of Ports: 5
from co-ax valves inc.
Function: pressure balanced 2/2 or 3/2 way coaxial valves externally controlled or direct acting, normally closed and normally open versions. Media: gaseous, liquid. Body Material: brass, nickel plated brass, stainless steel. Options: special threads, mounting, special voltage, plug M 12 x 1,... [See More]
- Actuation: ElectroHydraulic
- Valve Size: 0.06 to 0.12
- Valve Type: Solenoid; Control Valve; Drain; Hydraulic; Mixing; Shut Off; Underwater (optional feature); Coaxial Valve
- Maximum Pressure: 0.00 to 7500.00