YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve

The YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve stands as a sophisticated solution for precise fluid control in demanding industrial environments. This valve offers exceptional performance characteristics, including a high maximum flow rate of 60 L/min and a maximum operating pressure of 315 bar, ensuring robust operation even under strenuous conditions. Its advanced spool and sleeve design minimizes internal leakage, contributing to superior energy efficiency and precise actuator positioning. The YL-PV4/2S is engineered for reliability, featuring a durable construction and a design optimized for longevity, making it a cost-effective choice for critical hydraulic systems.

Product Specifications

| Parameter                 | Specification                               |

| :------------------------ | :------------------------------------------ |

| Model                     | YL-PV4/2S                                   |

| Type                      | Industrial Hydraulic Proportional Valve     |

| Max. Flow Rate            | 60 L/min                                    |

| Max. Operating Pressure   | 315 bar                                     |

| Control Type              | Proportional, Pilot-Operated                |

| Spool Type                | Various options (e.g., closed center, open center) |

| Electrical Connection     | Standard connectors (e.g., Deutsch, AMP)    |

| Solenoid Voltage          | Typically 12V DC or 24V DC                  |

| Response Time             | Optimized for dynamic control               |

| Filtration Requirement    | Recommended ISO 16/13 or finer              |

| Operating Temperature     | -20°C to +80°C (standard seals)             |

| Material                  | Cast iron, Steel, Nitrile seals (standard)  |

Core Features & Market Positioning

The YOULI YL-PV4/2S distinguishes itself through its pilot-operated design, which allows for high flow capacity with a relatively low pilot flow requirement. This translates to greater energy efficiency and less demand on the main control system. Its precision-engineered spool and sleeve arrangement offers excellent metering characteristics, crucial for applications demanding fine control over actuator speed and position. The valve's robust construction, built to withstand high pressures up to 315 bar, positions it as a reliable component for heavy-duty machinery and industrial automation. Market positioning is further solidified by its adaptability to various control signals and its competitive pricing, offering a strong value proposition for system integrators and end-users seeking high performance without exorbitant costs.

Key Application Scenarios

The versatility of the YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve makes it indispensable across a spectrum of industrial applications. It is frequently specified in material handling equipment, such as forklifts and cranes, where precise control of lifting and lowering speeds is paramount for safety and efficiency. In machine tool manufacturing, the YL-PV4/2S enables sophisticated control of hydraulic cylinders for automated feeding, clamping, and precise positioning of workpieces. Its high flow capabilities also lend themselves to injection molding machines, facilitating rapid and controlled movements of critical hydraulic components. Furthermore, it finds application in robotics and automation systems, where seamless integration with electronic controllers allows for complex, dynamic motion profiles and accurate force feedback.

Practical System Integration Guidance

Integrating the YOULI YL-PV4/2S into an existing hydraulic system demands careful consideration of fluid cleanliness and electrical connections. The system's hydraulic fluid should meet the recommended filtration standards, typically ISO 16/13 or finer, to prevent premature wear of the valve's precision components. Electrical connections must be secure and correctly wired according to the solenoid’s voltage and polarity specifications; incorrect wiring can lead to valve malfunction or damage. For optimal performance, the valve should be mounted in a configuration that prevents air entrapment and allows for easy access for maintenance. System commissioning typically involves a gradual pressurization and a series of test cycles to verify correct operation and responsiveness to control signals.

Operation and Risk Mitigation

Safe operation of the YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve hinges on adherence to specified operating parameters and proper system design. Exceeding the maximum operating pressure of 315 bar or the maximum flow rate of 60 L/min can lead to component failure and potential safety hazards. Regular inspection of hydraulic lines, seals, and electrical connections is critical to identify and address potential leaks or wear before they escalate. While the YL-PV4/2S is designed for reliability, common troubleshooting may involve checking for contamination in the hydraulic fluid, verifying solenoid functionality, and ensuring the control signal is within the expected range. Specific fault codes are typically generated by the accompanying control system rather than the valve itself, necessitating consultation of the controller's documentation for detailed diagnostics.

Scalability & Long-Term Value

The YOULI YL-PV4/2S offers a pathway to enhanced system capabilities and future-proofing. Its compatibility with standard industrial control voltages and signal types facilitates integration with a wide range of PLCs and industrial PCs, enabling seamless incorporation into both new and existing automation architectures. For facilities moving towards Industry 4.0, the proportional nature of the YL-PV4/2S allows for precise feedback and control, essential for advanced diagnostics and predictive maintenance strategies when paired with appropriate sensors and IIoT platforms. The availability of various spool options also provides a degree of scalability, allowing system designers to fine-tune hydraulic performance as application requirements evolve, thereby extending the long-term value and operational lifespan of the hydraulic system.

Frequently Asked Questions

What is the maximum flow rate of the YOULI YL-PV4/2S?

The YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve is rated for a maximum flow rate of 60 liters per minute. This capacity is suitable for many medium-duty industrial hydraulic applications requiring significant fluid volume. It ensures efficient operation of actuators and hydraulic systems needing substantial flow.

This flow rate allows for dynamic responses in applications like machine tools and material handling. It is crucial for achieving desired cycle times and operational speeds. Ensure your system's pump and accumulator capacity are aligned with this maximum flow to avoid system inefficiencies or cavitation.

Proper system design, including appropriate line sizing and minimizing flow restrictions, is essential to achieve the stated 60 L/min performance. Exceeding this can lead to increased pressure drops, heat generation, and potential damage to the valve or other system components.

What is the maximum operating pressure for the YL-PV4/2S valve?

The YOULI YL-PV4/2S is designed to operate safely up to a maximum pressure of 315 bar. This high-pressure rating makes it suitable for robust industrial environments and demanding machinery. It ensures reliable performance even under significant load conditions.

Operating within this pressure limit is critical for the longevity and safety of the valve and the entire hydraulic system. Exceeding 315 bar can cause seal extrusion, component fatigue, and potentially catastrophic failure. Always design your system with adequate safety margins.

For applications consistently near the maximum pressure, consider implementing pressure relief valves and performing regular system inspections. This proactive approach helps mitigate risks associated with high-pressure operation and ensures sustained performance of the YL-PV4/2S.

How does the pilot-operated design of the YL-PV4/2S benefit hydraulic systems?

The pilot-operated design allows a small pilot valve to control a larger main stage spool. This significantly reduces the electrical power required to actuate the valve. It means the main flow of hydraulic fluid is controlled with less energy input from the solenoid.

This energy efficiency is a key advantage, leading to lower operational costs and reduced heat generation within the hydraulic system. It also enables precise metering of fluid, resulting in smoother and more accurate actuator movements. The pilot stage handles the fine control, while the main stage delivers the necessary flow.

Furthermore, the pilot-operated architecture can provide better force feedback and more responsive dynamic performance. This is particularly beneficial in closed-loop control systems where precise and rapid adjustments are essential for optimal process control and machine performance.

What are the typical electrical connection types for the YOULI YL-PV4/2S?

The YOULI YL-PV4/2S typically features standard industrial electrical connectors for ease of integration. Common types include Deutsch DT series connectors or AMP/TE Connectivity connectors, ensuring robust and reliable electrical interfaces. These connectors are designed for harsh environments.

These standardized connections simplify wiring and maintenance procedures, reducing installation time and the potential for connection errors. Ensuring the mating connector is properly seated and sealed is crucial for preventing ingress of contaminants like dust and moisture, which can compromise electrical integrity.

Always verify the specific connector type and pin configuration detailed in the valve's datasheet before procuring mating parts or performing installation. This attention to detail guarantees a secure and functional electrical link for the proportional solenoid.

What filtration level is recommended for the hydraulic fluid when using the YL-PV4/2S?

A high level of fluid cleanliness is essential for the optimal performance and longevity of the YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve. A filtration rating of ISO 16/13 or finer is generally recommended. This level ensures removal of fine particulate matter that could otherwise impede the precise movement of the spool and sleeve.

Maintaining this filtration standard prevents premature wear on critical internal components, such as the spool and sleeve, as well as other sensitive parts of the hydraulic system. Contaminated fluid can lead to increased leakage, sluggish response times, and eventual valve failure.

Regular monitoring of the hydraulic fluid's cleanliness level and timely replacement of filter elements are crucial maintenance practices. This proactive approach helps to safeguard the YL-PV4/2S and ensures consistent, reliable operation of the entire hydraulic circuit.

Can the YL-PV4/2S be used in extreme temperature environments?

The standard configuration of the YOULI YL-PV4/2S is typically rated for operating temperatures ranging from -20°C to +80°C, assuming standard Nitrile (NBR) seals. This range covers many common industrial applications effectively. Adherence to this range is vital for maintaining seal integrity and operational performance.

For applications operating outside this standard range, specialized seal materials can often be specified. Options like Viton (FKM) seals can extend the upper operating temperature limit, while others may be suitable for lower temperatures. Consulting the manufacturer for custom configurations is recommended for extreme conditions.

It's important to consider the thermal expansion of system components and the viscosity changes of hydraulic fluid at extreme temperatures. These factors can impact valve performance and system efficiency, so proper system design is crucial for operation in demanding thermal environments.

What is the typical response time for the YOULI YL-PV4/2S valve?

The YOULI YL-PV4/2S is engineered for dynamic control, offering optimized response times suitable for demanding applications. While specific figures can vary based on system conditions and spool configuration, the valve is designed to react quickly to electrical input signals. This ensures precise motion control.

Its pilot-operated design contributes to a swift transition between flow states. This capability is crucial for applications requiring rapid adjustments in speed or position, such as in high-speed automation or robotics. The valve's internal geometry is optimized to minimize fluid inertia effects.

For precise performance metrics, it's advisable to consult the detailed product datasheet for the YL-PV4/2S. This will provide specific response time data under various operating conditions, enabling accurate system design and performance prediction for critical applications.

How do I troubleshoot a sluggish YL-PV4/2S proportional valve?

A sluggish response from the YOULI YL-PV4/2S could indicate several issues. First, check the hydraulic fluid for contamination or degradation, as dirty fluid can impede spool movement. Ensure the fluid viscosity is within the recommended range for current operating temperatures.

Next, verify the electrical signal being sent to the proportional solenoid. An incorrect or weak control signal will result in poor valve actuation. Also, inspect the electrical connections for corrosion or looseness that could hinder signal transmission.

Finally, consider internal valve wear or a partially blocked pilot port. If the valve has seen extensive service or operated with poor fluid quality, internal components may need cleaning or replacement. Always depressurize the system before performing internal checks or maintenance.

What are the advantages of using a pilot-operated proportional valve like the YL-PV4/2S over a direct-acting valve?

Pilot-operated proportional valves like the YL-PV4/2S offer a significant advantage in terms of flow capacity relative to solenoid size and power consumption. The main valve spool is moved by hydraulic pressure, allowing for much higher flow rates with a smaller, lower-power solenoid compared to direct-acting valves. This translates to substantial energy savings.

This design also provides superior control over larger volumes of fluid. The pilot stage offers finer metering capabilities, allowing for smoother, more precise control of actuator speed and position. This precision is often critical in applications demanding accurate motion profiles, such as advanced robotics and sophisticated machine tools.

Furthermore, pilot-operated valves can generally handle higher system pressures more effectively than direct-acting types of equivalent flow capacity. This robustness makes them ideal for heavy-duty industrial applications where reliability and performance under demanding conditions are paramount.

Where can I find the detailed technical documentation for the YOULI YL-PV4/2S?

Detailed technical documentation, including comprehensive datasheets, installation manuals, and performance curves for the YOULI YL-PV4/2S Industrial Hydraulic Proportional Valve, is typically available directly from the manufacturer or authorized distributors. These documents are essential for proper system design and operation.

These resources will contain crucial information such as precise spool configurations, electrical specifications, pressure/flow charts, and recommended maintenance procedures. Always refer to the most current version of the documentation provided by YOULI to ensure accurate specifications and safe operation.

You can usually find this documentation on the official YOULI website under their product support or downloads section, or by contacting their sales or technical support departments directly. They can provide you with the specific documents tailored to your needs.