YOULI SN-3/10S Universal Hydraulic Multiple Control Valve

The YOULI SN-3/10S Universal Hydraulic Multiple Control Valve is engineered for robust performance and versatility in demanding industrial applications. This sectional directional control valve boasts a compact construction, minimizing space requirements without compromising functionality. Its design prioritizes a low pressure drop, contributing to high efficiency and extended service life. Available in various operation methods, including manual, pneumatic, hydraulic, and electro-hydraulic, the SN-3/10S offers adaptable control for diverse system needs. It also provides a choice of port and circuit valve configurations, further enhancing its universal applicability. The valve features a hardened, high-accuracy spool for sustained precision and reliability.

Product Specifications

| Parameter                | Specification                                 |

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

| Nominal Flow Rate        | 50 L/min (13 US gpm)                      |

| Max. Operating Pressure  | 315 bar (4600 psi)                  |

| Max. Back Pressure (T)   | 25 bar (360 psi)                    |

| Fluid Temperature (NBR)  | -20°C to 80°C (-4°F to 176°F)              |

| Fluid Temperature (FPM)  | -20°C to 100°C (-4°F to 212°F)             |

| Viscosity Operating Range| 15-75 mm²/s (cst)                         |

| Minimum Viscosity        | 12 mm²/s (cst)                            |

| Maximum Viscosity        | 400 mm²/s (cst)                           |

| Ambient Temperature Range| -40°C to 60°C (-40°F to 140°F)             |

Core Features & Market Positioning

The YOULI SN-3/10S stands out in the market due to its inherent universality and high performance. YOULI Hydraulic, with over three decades of experience since 1975, is recognized as a professional manufacturer of hydraulic valves, including directional control valves. This extensive experience translates into meticulous attention to detail and stringent quality control throughout the production process, ensuring products meet precise tolerances. The SN-3/10S is designed for durability, featuring a hardened high-accuracy spool for long-term reliable operation. Its compact design, low pressure drop, and high efficiency are key competitive advantages, making it a preferred choice for applications where space and performance are critical.

Key Application Scenarios

The versatility of the YOULI SN-3/10S Universal Hydraulic Multiple Control Valve makes it suitable for a wide array of demanding applications. It is extensively used in construction machinery, sanitation vehicles, drilling machines, and other special-purpose vehicles, highlighting its robust nature for mobile hydraulic systems. Common applications include agricultural machinery, dump trucks, hook loaders, and refuse trucks, where reliable and precise hydraulic control is paramount. The valve's ability to integrate into both open and closed-center hydraulic systems, coupled with its multiple control options, further broadens its applicability across various industrial sectors.

Practical System Integration Guidance

Integrating the YOULI SN-3/10S into existing hydraulic systems is facilitated by its sub-plate mounting design, simplifying installation. The valve offers various control types, including manual, pneumatic, hydraulic, and electro-hydraulic, requiring appropriate pilot or electrical connections depending on the selected configuration. For electro-hydraulic control, specific kits like the "10S" option, which includes an ON/OFF electro-hydraulic control kit with pilot and drain line, are available. System designers must ensure compatibility with the specified operating pressure, flow rate, and fluid viscosity ranges to guarantee optimal performance and longevity. The 'C' port can serve as a hydraulic source for other components within the system.

Operation and Risk Mitigation

Safe and efficient operation of the YOULI SN-3/10S requires adherence to specified operating parameters and proper system maintenance. Key operational considerations include maintaining fluid within the recommended temperature and viscosity ranges, as using fluids outside these parameters can affect valve performance and lifespan. The valve is designed with a hardened spool for accuracy, but contamination of the hydraulic fluid can lead to premature wear and operational issues. It is advisable to utilize appropriate filtration within the hydraulic system to prevent particle ingress. While specific fault codes are not detailed in the provided documentation, common hydraulic system troubleshooting would involve checking for leaks, pressure fluctuations, and consistent spool movement. Ensuring correct installation and control method selection is crucial to prevent unintended actuations or system failures.

Scalability & Long-Term Value

The YOULI SN-3/10S offers significant long-term value through its modular, sectional design, allowing for scalability and customization. Users can configure the number of working sections to match evolving system requirements, with models supporting multiple sections. This adaptability means the valve can grow with a project or be reconfigured for different tasks, extending its service life and reducing the need for complete replacements. Furthermore, YOULI's commitment to quality and precision manufacturing ensures a durable product, and their continuous improvement in manufacturing standards supports the long-term reliability of their hydraulic solutions. While direct integration with IIoT solutions isn't explicitly detailed, the availability of electro-hydraulic control options provides a foundation for future integration with digital monitoring and control systems.

Frequently Asked Questions (FAQs)

Q1: What is the maximum operating pressure for the YOULI SN-3/10S valve?

The YOULI SN-3/10S Universal Hydraulic Multiple Control Valve can handle a maximum operating pressure of 315 bar. This is a critical specification for ensuring system integrity and safety in high-pressure hydraulic applications. It's important to design systems around this limit to prevent damage or failure.

This pressure rating ensures the valve's robustness for demanding industrial and mobile hydraulic tasks. It allows for efficient power transmission in applications requiring significant force. Always consult system design parameters to confirm this capability is suitable for your specific setup.

Adhering to this maximum pressure limit is essential for the valve's longevity and reliable performance. Exceeding this specification can lead to component damage and operational hazards. Proper system design and maintenance are key to respecting these operational boundaries.

Q2: What types of control methods are available for the YOULI SN-3/10S?

The SN-3/10S offers a wide range of control methods to suit various applications. These include manual operation, pneumatic control, and hydraulic pilot control. It also supports electro-hydraulic actuation for automated systems.

This flexibility in control types makes the valve highly adaptable for diverse industrial and mobile hydraulic circuits. Users can select the most appropriate actuation method based on their operational needs and existing infrastructure. This versatility is a key advantage.

The availability of electro-hydraulic control, particularly with options like the 10S kit, allows for integration into more advanced systems. This enables remote operation and automation, which is crucial for modern industrial processes.

Q3: What is the nominal flow rate of the YOULI SN-3/10S?

The nominal flow rate for the YOULI SN-3/10S Universal Hydraulic Multiple Control Valve is 50 liters per minute. This is equivalent to approximately 13 US gallons per minute.

This flow rate is a key parameter for hydraulic system design, determining how quickly hydraulic fluid can be moved through the valve. It influences the speed at which actuators can operate. Proper sizing is vital for efficient system performance.

When specifying the SN-3/10S, ensure that the system's total flow requirements do not exceed this nominal rate for optimal efficiency and to prevent potential issues like overheating or cavitation.

Q4: Can the YOULI SN-3/10S be used in extreme temperature environments?

Yes, the YOULI SN-3/10S is designed to operate in a broad ambient temperature range. It can function effectively in environments from -40°C to 60°C (-40°F to 140°F).

The fluid temperature range depends on the seal material used. With NBR seals, it operates between -20°C to 80°C (-4°F to 176°F). Using FPM seals extends this to -20°C to 100°C (-4°F to 212°F).

This wide operational temperature capability makes the SN-3/10S suitable for various global climates and industrial settings, from cold storage to heated environments. Always consider the seal material's compatibility with the hydraulic fluid.

Q5: What are the advantages of a sectional control valve like the SN-3/10S?

Sectional control valves, such as the SN-3/10S, offer significant advantages in flexibility and customization. They allow for the addition or removal of sections to match specific circuit requirements, enabling scalability.

Their modular design also simplifies maintenance and repair, as individual sections can be replaced if necessary. This reduces downtime and overall system ownership costs. The complexity of the hydraulic circuit dictates the number of sections needed.

Furthermore, sectional valves often provide a more compact solution compared to multiple monoblock valves for complex circuits. This leads to space savings and potentially lighter-weight systems, especially in mobile applications.

Q6: What is the maximum back pressure allowed on the outlet port (T) of the SN-3/10S?

The maximum permissible back pressure on the outlet port (T) for the YOULI SN-3/10S is 25 bar, which is approximately 360 psi. Exceeding this can cause system inefficiencies and potential damage.

Maintaining back pressure within specified limits is crucial for the valve's proper functioning and the overall hydraulic system's performance. It ensures that return flow can occur without excessive resistance.

This specification is important for system designers to consider when routing return lines and incorporating any back pressure regulating valves in the circuit. Proper management of return flow is key.

Q7: How does the hardened spool in the SN-3/10S contribute to its performance?

The hardened high-accuracy spool is a critical component that ensures the valve's precision and longevity. Hardening the spool material increases its resistance to wear and abrasion, which are common issues in hydraulic systems.

This durability allows the valve to maintain its sealing characteristics and accurate flow control over extended periods of operation. It contributes to consistent performance and reduces the need for frequent recalibration or replacement.

By minimizing wear, the hardened spool helps prevent internal leakage and maintain consistent pressure differentials, ultimately contributing to the hydraulic system's overall efficiency and reliability.

Q8: Can the YOULI SN-3/10S valve be used in both parallel and series hydraulic circuits?

Yes, the YOULI SN-3/10S is designed for versatility and can be configured for various circuit types. It supports both parallel and series-parallel circuit configurations.

This adaptability allows it to be integrated into a wide range of hydraulic system architectures, offering flexibility for different application requirements and system designs. The specific configuration depends on the desired flow characteristics.

Understanding the circuit type (parallel or series) is crucial during installation and operation, as it affects how fluid is distributed and controlled within the hydraulic system. Always refer to system schematics.

Q9: What is the role of the 'C' port on the YOULI SN-3/10S?

The 'C' port on the YOULI SN-3/10S acts as an oil bridge. This means it can be utilized as a hydraulic source to supply fluid to other components or sections within the same hydraulic system.

This feature enhances the valve's integration capabilities, allowing for more complex hydraulic setups where a single inlet can feed multiple functions or auxiliary circuits. It streamlines system plumbing.

Effectively using the 'C' port can help optimize hydraulic system design by providing a convenient and integrated fluid supply point for secondary functions, promoting a more consolidated system layout.

Q10: What are the typical industries or applications where the YOULI SN-3/10S is commonly used?

The YOULI SN-3/10S finds extensive application in mobile hydraulics. This includes construction machinery, sanitation vehicles, drilling machines, and special-purpose vehicles.

It is also prevalent in agricultural machinery, dump trucks, hook loaders, and refuse trucks. Its robustness and versatility make it ideal for demanding operational environments.

The valve's ability to handle high pressures and its various control options lend themselves to a broad spectrum of industrial uses requiring reliable hydraulic power and control.