Universal for open center systems
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Professional hydraulic directional control valves for open center systems
Hydraulic directional control valves are the main actuating elements in fluid power systems, responsible for directing the flow of the working medium to individual consumers. The offered devices are dedicated to the precise control of double-acting cylinders and orbital motors in mobile and stationary machinery. The implemented design allows for smooth flow regulation while maintaining high volumetric efficiency of the entire circuit. Thanks to advanced spool machining processes, these devices guarantee minimal internal leakage, which is crucial for maintaining pressure stability in the system.
Application and technical characteristics
These devices are designed for operation in systems powered by fixed displacement pumps (open center systems), where it is essential to ensure free flow of the medium to the tank in the neutral position. The valve bodies are made of high-strength spheroidal cast iron, allowing for safe operation at working pressures reaching 350 bar. Compatibility with mineral hydraulic oils compliant with DIN 51524 ensures stable operation across a wide range of operating temperatures from -20°C to +80°C. Each unit undergoes rigorous static and dynamic tests, guaranteeing tightness under high loads.
In advanced control systems where remote operation is required, our components can be equipped with cable-operated hydraulic directional control valves. This solution significantly improves operator ergonomics by eliminating the need to route high-pressure lines directly into the cab. In situations requiring precise positioning of machine arms, we recommend using cable and joystick kits, which provide intuitive control over each working section individually.
Why choose our components?
- Compliance with ISO standards: All components meet international design standards for hydraulic parts, as confirmed by pressure tests certifying material strength.
- Hydraulic optimization: Internal channels with reduced flow resistance limit thermal energy losses, resulting in lower fuel consumption by the machine's power unit.
- Easy expansion: The modular construction of the bodies allows for integration with additional sections, relief valves, or blocks such as 6/2 solenoid valves, enabling quick switching between different working circuits.
- High seal longevity: The use of advanced aging-resistant elastomers ensures maintenance-free operation even under intensive use in harsh environmental conditions.
| Technical parameter | Specification |
|---|---|
| Body material | Spheroidal cast iron (GJS-500) |
| Nominal working pressure | Up to 350 bar |
| Medium temperature | -20°C to +80°C |
| Oil cleanliness class (ISO 4406) | 19/16/13 |
Frequently Asked Questions (FAQ)
1. Does the hydraulic directional control valve require special installation? Installation must take place on a flat surface to avoid body stress. Fittings with appropriate threads must be used in accordance with technical documentation, ensuring system cleanliness before startup.
2. How to select the correct nominal flow rate for the control valve? The nominal flow (liters per minute) should match the pump capacity. Exceeding the recommended values causes an increase in flow resistance and excessive heating of the medium.
3. Why do external leaks occur? The most common cause is solid contamination in the oil, which damages the spool seals. We recommend regular replacement of hydraulic filters according to the machine's operating manual.