YOULI SN-4/12S Multiple Control Hydraulic Valve

YOULI SN-4/12S Multiple Control Hydraulic Valve: Precision Engineering for Demanding Applications

The YOULI SN-4/12S Multiple Control Hydraulic Valve represents a pinnacle of hydraulic control technology, engineered for superior performance and reliability in the most demanding industrial environments. This sectional directional control valve offers unparalleled versatility, robust construction, and precise operation, making it an indispensable component for a wide array of hydraulic systems. Key advantages include its compact design, minimizing space requirements, and a remarkably low pressure drop, which enhances system efficiency. The SN-4/12S boasts a long service life, attributed to its high-efficiency operation and a high-accuracy spool that is hardened for sustained precision. Technical specifications underscore its capability: a nominal flow rate of 80 L/min (21 US gpm) and a maximum operating pressure of 315 bar (4600 psi) in parallel or tandem circuits, and 250 bar (3050 psi) in series circuits. The fluid temperature range with NBR seals is from -20°C to 80°C, expanding to 100°C with FPM seals. Its operating viscosity range is 15-75 mm²/s, with maximums of 400 mm²/s and minimums of 12 mm²/s. Ambient temperature tolerance spans from -40°C to 60°C.

Product Specifications

| Specification            | Value                                                                                                    |

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

| Nominal Flow Rate        | 80 L/min (21 US gpm)                                                                        |

| Maximum Operating Pressure | 315 bar (4600 psi) (Parallel/Tandem Circuit); 250 bar (3050 psi) (Series Circuit)       |

| Maximum Back Pressure (T) | 25 bar (360 psi)                                                                            |

| Fluid Temp. Range (NBR)  | -20°C to 80°C (-4°F to 176°F)                                                              |

| Fluid Temp. Range (FPM)  | -20°C to 100°C (-4°F to 212°F)                                                             |

| Viscosity Range          | 15-75 mm²/s (15-75 cst); Min: 12 mm²/s (12 cst); Max: 400 mm²/s (400 cst)         |

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

| Mounting                 | Sub-plate                                                                                   |

| Spool Material           | Hardened for long-term accuracy                                                             |

Core Features & Market Positioning

The YOULI SN-4/12S distinguishes itself through a suite of advanced features that solidify its market position as a premium hydraulic control solution. Its modular, sectional design allows for custom configurations, enabling engineers to tailor valve assemblies to precise application requirements. This adaptability, combined with a focus on high quality and precision manufacturing, as evidenced by ISO 9001:2008 certification, positions YOULI as a reliable partner for critical hydraulic systems. The valve's inherent benefits—compactness, reduced pressure drop, and extended service life—translate directly into operational advantages for end-users, minimizing downtime and optimizing energy consumption. YOULI's commitment to meticulous quality control at every production stage ensures that each SN-4/12S valve meets stringent tolerances, delivering consistent and dependable performance.

Key Application Scenarios

The versatility and robust design of the YOULI SN-4/12S Multiple Control Hydraulic Valve make it exceptionally well-suited for a broad spectrum of industrial and mobile hydraulic applications. It is frequently specified for construction machinery, where precise control of actuators for lifting, digging, and movement is paramount. Agricultural equipment, such as tractors and harvesters, benefits from the valve's reliable performance in demanding field conditions. In the lifting and transport sector, including forklifts and aerial work platforms, the SN-4/12S ensures safe and efficient operation. Furthermore, its application extends to various industrial vehicles and specialized hydraulic systems, including drilling rigs and garbage trucks, where multi-functionality and durability are critical. The ability to integrate multiple control functions within a single valve assembly simplifies system design and reduces potential points of failure.

Practical System Integration Guidance

Integrating the YOULI SN-4/12S into a hydraulic system requires careful consideration of port configurations, spool options, and control methods. The valve supports sub-plate mounting, facilitating straightforward installation and maintenance. A variety of operating methods are available, including manual, pneumatic, hydraulic, and electro-hydraulic actuation, providing flexibility in system design and control architecture. Users can select from diverse port and circuit valve options to optimize fluid flow and system response. The SN-4/12S also offers optional port relief valves to protect downstream components from over-pressurization. When configuring the system, engineers must ensure that the chosen spool options and internal circuit configurations (e.g., parallel, tandem, or series) align with the hydraulic circuit's operational demands and pressure requirements. Careful attention to seal material compatibility with the hydraulic fluid and operating temperature range is also crucial for long-term reliability.

Operation and Risk Mitigation

Safe and efficient operation of the YOULI SN-4/12S Multiple Control Hydraulic Valve hinges on adherence to recommended practices and understanding potential failure modes. The valve's design incorporates features such as hardened spools for enhanced durability and accuracy, contributing to reliable control over extended periods. Potential troubleshooting may involve issues related to spool spooling, leakage, or actuation malfunctions. Proper system maintenance, including regular fluid analysis and filter changes, is essential to prevent contamination, which can lead to spool wear or sticking, affecting performance. The critical error codes are not typically associated with the valve itself but rather with the overarching hydraulic system's control logic or sensor feedback. Adherence to the specified operating pressure limits and temperature ranges is paramount to prevent component damage and ensure safety.

Scalability & Long-Term Value

The YOULI SN-4/12S is designed with scalability and long-term value in mind, making it an adaptable solution for evolving industrial needs. Its sectional construction allows for the addition or modification of working sections, enabling systems to be expanded or reconfigured as requirements change. This modularity minimizes the need for complete system overhauls when upgrades are necessary, offering a cost-effective approach to capacity enhancement. Compatibility with a wide range of YOULI hydraulic components and broader industrial hydraulic standards ensures seamless integration into existing or new platforms. While specific IIoT integration details may vary based on the control system, the valve's precise and repeatable operation provides a solid foundation for data acquisition and remote monitoring within a digitally connected manufacturing environment. This focus on flexibility and robust engineering ensures sustained performance and value throughout the product lifecycle.

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Frequently Asked Questions (FAQs)

Q1: What is the maximum flow rate for the YOULI SN-4/12S?

The YOULI SN-4/12S hydraulic valve is rated for a nominal flow rate of 80 liters per minute (L/min), which equates to approximately 21 US gallons per minute (gpm). This flow capacity makes it suitable for a wide range of medium-duty hydraulic applications where efficient fluid delivery is essential.

This flow rate ensures that hydraulic circuits can operate effectively, powering cylinders, motors, and other actuators at a substantial volume. It is a key parameter for engineers sizing hydraulic systems to meet performance demands.

The capacity of 80 L/min allows for rapid response times in actuation and efficient operation of machinery, contributing to overall productivity in various industrial and mobile settings.

Q2: What are the pressure limitations of the YOULI SN-4/12S?

The SN-4/12S valve can handle a maximum operating pressure of 315 bar (4600 psi) when configured for parallel or tandem hydraulic circuits. For series circuit configurations, the maximum operating pressure is 250 bar (3050 psi).

It is crucial to operate within these pressure limits to ensure the longevity and reliability of the valve and the entire hydraulic system. Exceeding these pressures can lead to component failure and safety hazards.

The back pressure on the outlet port (T) is limited to a maximum of 25 bar (360 psi), which must also be considered during system design and operation to prevent undue stress on the valve.

Q3: What types of actuation methods can be used with the YOULI SN-4/12S?

The YOULI SN-4/12S offers significant flexibility in actuation, supporting manual, pneumatic, hydraulic, and electro-hydraulic control methods. This versatility allows system designers to select the most appropriate control interface based on application requirements, existing infrastructure, and operator preferences.

Manual control provides direct, tactile operation, often preferred for simplicity and immediate feedback in certain mobile applications. Pneumatic and hydraulic actuation offer remote control capabilities, useful in environments where direct operator access is difficult or hazardous.

Electro-hydraulic actuation enables integration with automated systems and electronic controls, allowing for precise, programmable operation and interface with digital control platforms, enhancing overall system intelligence and efficiency.

Q4: What are the typical applications for the YOULI SN-4/12S?

This hydraulic valve is widely deployed in demanding sectors such as construction machinery, agricultural equipment, and lifting and transport vehicles. Its robust design and precise control are ideal for functions like excavating, lifting, and material handling.

It finds application in specialized industrial vehicles, including drilling rigs and garbage trucks, where its multi-functional capabilities and durability are highly valued. The valve's ability to manage complex hydraulic circuits makes it suitable for custom engineering applications.

Essentially, any system requiring reliable and precise directional control of hydraulic fluid flow in mobile or industrial settings is a potential application for the YOULI SN-4/12S.

Q5: Can the YOULI SN-4/12S be customized for specific system needs?

Yes, the SN-4/12S is a sectional directional control valve, meaning its modular design allows for customization by configuring different working sections. This enables users to build valve assemblies tailored to their exact number of control functions and operational requirements.

Users can select from a variety of spool options, port configurations, and specific circuit valve functionalities to optimize performance for their unique hydraulic system. This modularity ensures efficient use of space and resources.

Beyond internal configurations, YOULI also offers various actuation methods (manual, pneumatic, hydraulic, electro-hydraulic), further enhancing the valve's adaptability to diverse control system architectures and integration needs.

Q6: What are the temperature and viscosity considerations for the YOULI SN-4/12S?

The valve operates effectively within a fluid temperature range of -20°C to 80°C (-4°F to 176°F) when equipped with standard NBR seals. For higher temperature applications, FPM (Viton) seals extend this range to -20°C to 100°C (-4°F to 212°F).

The recommended viscosity range for optimal performance is between 15 and 75 mm²/s (cst), with a minimum operating viscosity of 12 mm²/s and a maximum of 400 mm²/s. Operating outside these viscosity parameters can affect valve response and efficiency.

Ambient temperature tolerance is also broad, ranging from -40°C to 60°C (-40°F to 140°F), ensuring reliable operation across a wide spectrum of environmental conditions encountered in mobile and industrial settings.

Q7: What is the typical construction and mounting style of the YOULI SN-4/12S?

The YOULI SN-4/12S is a sectional directional control valve, characterized by its compact construction that facilitates space-saving installation. It is designed for sub-plate mounting, which simplifies assembly and maintenance by allowing the valve to be bolted directly onto a manifold or mounting plate.

This design approach ensures robust connections and precise alignment, crucial for preventing leaks and ensuring consistent hydraulic performance. The sub-plate interface allows for standardized connections, simplifying integration into existing hydraulic power units or custom manifolds.

The sectional nature means that multiple valve sections can be assembled in series to create a valve bank that provides the required number of controlled circuits, offering significant flexibility for complex hydraulic systems.

Q8: What makes the YOULI SN-4/12S durable and long-lasting?

Durability is engineered into the SN-4/12S through several key features, including a high-accuracy spool that is hardened for extended operational life and consistent precision. The overall construction is designed for high efficiency, which contributes to reduced wear by minimizing internal pressure losses and heat generation.

YOULI's commitment to stringent quality control throughout the manufacturing process ensures that each valve meets high standards of material integrity and assembly precision. This meticulous attention to detail minimizes potential failure points and enhances the valve's resistance to the stresses of continuous operation.

The use of appropriate seal materials (NBR or FPM) compatible with the hydraulic fluid and operating temperature further contributes to the valve's longevity by preventing degradation and leakage over time.

Q9: How does the YOULI SN-4/12S contribute to system efficiency?

A significant factor in the SN-4/12S's efficiency is its low pressure drop characteristic. This means less energy is lost as the hydraulic fluid flows through the valve, resulting in more power being delivered to the actuators and reduced energy consumption by the hydraulic pump.

The high-efficiency design of the valve itself minimizes internal leakage and optimizes flow paths, ensuring that a greater proportion of the input power is converted into useful work. This translates to lower operating costs and potentially smaller, more energy-efficient hydraulic power units.

By maintaining precise control and reducing energy waste, the SN-4/12S helps systems operate more smoothly and effectively, contributing to overall productivity and a reduced environmental footprint.

Q10: Where can I find technical documentation or support for the YOULI SN-4/12S?

Detailed technical specifications, performance data, dimensions, and ordering information for the YOULI SN-4/12S can typically be found in the manufacturer's official product catalogs or datasheets, available from YOULI Hydraulic Industrial Co., Ltd. or authorized distributors like Youli-America.

For specific inquiries regarding installation, system integration, troubleshooting, or parts, contacting YOULI's customer support or a certified distributor is recommended. They can provide expert guidance tailored to your application.

Authorized distributors, such as Youli-America, often maintain stock and can offer localized technical support, spare parts, and detailed product information, ensuring you receive comprehensive assistance for your YOULI SN-4/12S valve.