YOULI YL-PV4/12S Universal Hydraulic Proportional Valve

The YOULI YL-PV4/12S Universal Hydraulic Proportional Valve stands as a sophisticated solution for precise fluid control in demanding industrial applications. Engineered for accuracy and reliability, this valve offers a compelling combination of performance and versatility. Key advantages include its high flow capacity, rapid response times, and exceptional repeatability, ensuring optimal system efficiency and process stability. Its core features encompass advanced electronic control, robust construction for extended service life, and a compact design facilitating easy integration. Crucial technical parameters, such as a nominal flow rate of 12 L/min and a maximum operating pressure of 315 bar, underscore its capability to handle rigorous operational demands. The YL-PV4/12S is designed to deliver unparalleled control over hydraulic systems, making it a preferred choice for engineers seeking peak performance and long-term value.

Product Specifications

| Parameter          | Value                               |

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

| Model              | YL-PV4/12S                          |

| Nominal Flow Rate  | 12 L/min                            |

| Maximum Pressure   | 315 bar                             |

| Voltage            | 24 V DC                             |

| Control Signal     | Proportional (analog/digital options) |

| Port Size          | G1/4                                |

| Sealing Material   | Viton (standard)                    |

| Operating Temp.    | -20°C to +80°C                      |

| Response Time      | < 15 ms                             |

| Duty Cycle         | Continuous                          |

| Protection Class   | IP65                                |

Core Features & Market Positioning

The YOULI YL-PV4/12S distinguishes itself in the competitive hydraulic valve market through its innovative digital control interface and superior sealing technology. Unlike many standard proportional valves, the YL-PV4/12S incorporates advanced electronic feedback mechanisms that ensure exceptional positioning accuracy and response linearity, even under fluctuating system pressures. This technological edge positions it as a premium component for applications where precision is paramount, such as in robotics, advanced automation, and high-performance machine tools. Its market positioning is further solidified by its robust construction, utilizing high-grade materials that guarantee longevity and minimal maintenance, a critical factor for industrial operations focused on uptime and cost-efficiency. The valve's inherent reliability and consistent performance provide manufacturers with a competitive advantage by enabling more sophisticated and dependable end products.

Key Application Scenarios

The versatility of the YOULI YL-PV4/12S Universal Hydraulic Proportional Valve makes it indispensable across a wide spectrum of industrial sectors. In manufacturing automation, it excels in precise control of robotic arms, material handling systems, and assembly line machinery, ensuring smooth and accurate movements critical for complex production processes. For the mobile hydraulics industry, its rugged design and ability to withstand harsh environmental conditions make it ideal for excavators, agricultural machinery, and specialized transport vehicles, providing proportional control over lifting, steering, and implement functions. Furthermore, in specialized machinery, such as injection molding machines or CNC equipment, the YL-PV4/12S enables fine-tuned control over pressure and flow, optimizing cycle times, reducing energy consumption, and enhancing product quality. Its ability to integrate seamlessly with various control systems further broadens its applicability in sectors requiring sophisticated hydraulic actuation.

Practical System Integration Guidance

Integrating the YOULI YL-PV4/12S into existing hydraulic systems is streamlined due to its universal design and comprehensive documentation. For electrical connections, ensure the 24 V DC power supply is stable and correctly polarized, connecting to terminals specified in the manual. The proportional control signal, typically a 0-10V or 4-20mA analog input (depending on configuration), should be wired to the designated input terminals, paying close attention to signal integrity to prevent interference. Mounting the valve should be done in a clean environment, preferably on a manifold block, ensuring proper gasket seating to prevent leaks. Initial commissioning involves setting up the control parameters within the PLC or dedicated controller; typically, this includes defining the proportional gain, deadband, and maximum/minimum flow or pressure offsets to match the specific system requirements. Always perform a low-pressure system check before applying full operating pressure to verify correct valve actuation and prevent potential damage.

Operation and Risk Mitigation

Operating the YOULI YL-PV4/12S Universal Hydraulic Proportional Valve requires adherence to specified operating parameters to ensure safety and longevity. Never exceed the maximum rated pressure of 315 bar, as this can lead to catastrophic valve failure and system damage. Ensure the hydraulic fluid used meets the specified cleanliness standards; contamination is a primary cause of proportional valve malfunction, leading to sluggish response, erratic behavior, or complete loss of control. Regular visual inspections for leaks and abnormal noises during operation are crucial. In case of erratic behavior, such as inconsistent flow or pressure, immediately reduce system pressure and consult the troubleshooting guide. Common fault indicators include slow response times, failure to reach commanded position, or excessive noise, often stemming from contaminated fluid, electrical signal issues, or internal wear. Always de-energize the system and relieve all stored pressure before performing any maintenance or inspection.

Scalability & Long-Term Value

The YOULI YL-PV4/12S offers significant scalability and long-term value for evolving industrial needs. Its modular design and compatibility with standard hydraulic circuits allow for easy upgrades or replacements without requiring extensive system modifications. This ensures that as production demands increase or automation strategies advance, the YL-PV4/12S can be readily incorporated into new configurations or scaled across multiple machines. Furthermore, YOULI actively supports integration with modern Industrial Internet of Things (IIoT) platforms, enabling remote monitoring, diagnostics, and predictive maintenance capabilities. By equipping systems with these smart valves, businesses can achieve greater operational transparency, optimize performance through data-driven insights, and reduce downtime, thereby maximizing the return on investment and ensuring the system's relevance in the era of digital manufacturing.

Frequently Asked Questions

What is the primary function of the YOULI YL-PV4/12S proportional valve?

The YL-PV4/12S precisely controls hydraulic fluid flow and pressure. It allows for proportional adjustments, enabling fine-tuned actuator movements.

This valve is essential for applications demanding accurate speed and force control. It offers superior performance over on/off valves.

Its advanced design ensures high repeatability and smooth operation, crucial for automated processes.

How does the YL-PV4/12S handle high-pressure applications?

It is rated for a maximum operating pressure of 315 bar. This robust capability suits demanding industrial environments.

The valve's construction materials and sealing are designed to withstand significant hydraulic forces. This ensures reliability under stress.

Engineers can confidently apply it in systems requiring substantial power output and precise control at high pressures.

What are the electrical requirements for the YL-PV4/12S?

The standard model operates on a 24 V DC power supply. Consistent and stable power is critical for optimal performance.

It accepts proportional control signals, often 0-10V or 4-20mA. Ensure your controller provides a compatible signal.

Proper wiring and grounding are essential to prevent electrical noise and ensure accurate command signal transmission.

Can the YL-PV4/12S be used with different types of hydraulic fluid?

It is typically compatible with most standard hydraulic oils. Viton seals are common, offering broad fluid compatibility.

Always verify fluid compatibility with the specific seal material and operating temperature range. Consult the datasheet for detailed specifications.

Using incorrect fluid can lead to seal degradation and valve malfunction, impacting performance and lifespan.

What is the typical response time of the YL-PV4/12S?

The valve boasts a rapid response time, typically under 15 milliseconds. This ensures quick reactions to control signals.

This speed is vital for dynamic systems requiring immediate adjustments, such as robotics or high-speed automation.

Fast response contributes to overall system efficiency and the ability to execute complex motion profiles accurately.

How do I install the YL-PV4/12S valve in a hydraulic system?

Mount the valve on a clean manifold block for optimal performance. Ensure correct port alignment and gasket seating.

Connect the electrical control signals and power supply according to the wiring diagram provided. Avoid signal interference.

Purge the system thoroughly before initial operation to remove contaminants and verify correct valve function at low pressure.

What are common issues encountered during YL-PV4/12S operation?

Erratic flow or pressure control can indicate fluid contamination. Ensure fluid cleanliness and filter integrity.

Slow response or inability to reach setpoints may point to electrical signal problems or internal valve wear.

Abnormal noises might signal cavitation or internal component issues requiring inspection.

How can I troubleshoot a malfunctioning YL-PV4/12S proportional valve?

First, check the electrical supply voltage and the integrity of the control signal. Verify wiring connections.

Inspect the hydraulic fluid for contamination and ensure proper filtration is in place. Check for any physical damage to the valve.

If issues persist, consult the manufacturer's detailed troubleshooting guide or contact technical support for assistance.

Is the YL-PV4/12S suitable for outdoor or harsh environments?

Yes, with an IP65 protection class, it offers excellent resistance to dust and water ingress. This makes it robust for various industrial settings.

Ensure that connections are properly sealed to maintain the IP65 rating. Extended exposure to corrosive elements may require additional protective measures.

Its durable construction is designed to withstand typical industrial environmental challenges.

What are the advantages of using the YL-PV4/12S over a manual directional control valve?

It provides precise, proportional control, enabling fine adjustments to speed and position. Manual valves offer only on/off or limited manual flow control.

Automated systems can easily command the YL-PV4/12S via electronic signals. This allows for integration into sophisticated control loops.

The proportional valve ensures smoother operation, improved accuracy, and greater energy efficiency compared to manual alternatives.