
4-Way Manual Control Valve for High Pressure
Technical Description
The 4L series 4-way manually operated directional control valves are specifically designed for high-pressure applications. The valve system features a balanced spool design, ensuring that the operating force remains constant regardless of pressure. The valves are available in a version with a spring for automatic return of the lever to the center position or with a detent mechanism to hold the lever in the desired position.
Two internal connection configurations between the ports are typically available to meet any system requirement. The S outlet port can withstand the maximum pressure, allowing for the series connection of multiple valves in the A version (open center). The valves can also be supplied in a special version for specific use in shipbuilding.
Technical Specifications
| Model | Threaded Ports (B.S.P.) | Max. Pressure (bar) | Pressure Drop | Continuous Operating Temperature | Fluid Temperature | Permitted Fluid | Surface Protection | Recommended Viscosity |
|---|---|---|---|---|---|---|---|---|
| 4L-15F-3 | 3/4″ | 420 | see diagrams | -20°C / 85°C | -15°C / 80°C | Mineral oil DIN51524-51525 | From 2.5 to 400 cSt (from 1 to 50°E) | 35 cSt (4.5°E) a 50°C |
| 4L-20F-3 | 1″ | 450 | see diagrams |
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