YUKEN Style ESWKE-G04 Proportional Valve | SW-G04-C9-ET-A240-20 | High Response Control Valve

LIC Hydraulic presents the ESWKE-G04 Series, an industry-leading integrated Proportional Directional Valve designed for sophisticated closed-loop and open-loop control systems. Models like the ESWKE-G04-C2-200-ET-D24-K31-A1 feature On-Board Electronics (OBE), simplifying installation by combining the valve and amplifier into one robust unit. By translating analog input signals into precise spool movement, this series provides seamless control over both hydraulic flow and direction. Our valves offer 100% drop-in interchangeability with original Yuken-style designs and undergo 100% dynamic linearity testing for superior reliability.

Technical Highlights

• Series Code: ESWKE (OBE Type) / SW (Standard Type)

• Mounting Size: NG16 (CETOP 07) / G04

• Max Flow: Up to $200\text{–}300\text{ L/min}$ (Depending on model)

• Operating Pressure: Rated up to $315\text{ bar}$ (4500 psi)

• Control Signal: Standard ±10V DC or 4-20mA options

• Voltage: 24V DC standard for OBE modules

Core Advantages

• Integrated OBE System: The on-board amplifier eliminates the need for separate rack-mounted drivers, reducing EMI interference and simplifying electrical cabinet layouts.

• Superior Linear Control: Precision-lapped spools with linear metering notches ensure a highly accurate flow-to-signal relationship, essential for precision positioning.

• High Dynamics: Specifically engineered for rapid response times, allowing the valve to track fast-changing control signals in high-speed cycle machines.

• Field Adjustability: Accessible potentiometers on the OBE allow for easy field calibration of the zero point and max flow settings without the need for complex software.

Application Areas

• Metal Forming: Press brake synchronization and drawing press pressure profiling.

• Injection Molding: Precise velocity control for injection and clamp cushioning.

• Mobile Automation: Smooth acceleration and deceleration for heavy-duty lifting platforms.

• Steel Industry: Synchronized control for continuous casting and rolling mill auxiliary systems.

Expert Maintenance Tips

• Shielded Cabling: Always use high-quality shielded cables for the analog input to prevent erratic spool behavior caused by electromagnetic noise.

• Filtration Management: To protect the precision-machined spool, maintain fluid at ISO 18/16/13 cleanliness. A 10-micron absolute pressure filter is the best defense against valve sticking.

• Pilot Pressure Stability: For pilot-operated units (ET series), verify that the pilot pressure is stable. Inconsistent pilot supply can cause sluggish response or failure to reach full flow capacity, especially under load.