YOULI SN-4/11S Multiple Control Hydraulic Valve
The YOULI SN-4/11S Multiple Control Hydraulic Valve is a high-performance, versatile component engineered for demanding industrial applications. It offers exceptional control and reliability, making it a preferred choice for complex hydraulic systems. This valve is distinguished by its compact design, low pressure drop, and extended service life, ensuring efficient operation and reduced maintenance requirements.
Product Specifications
| Parameter | Specification |
| :-------------------- | :------------------------------------------------- |
| Nominal Flow Rate | 80 L/min (21 US gpm) |
| Maximum Operating Pressure | 315 bar (4600 psi) |
| Max Back Pressure (Outlet Port T) | 25 bar (360 psi) |
| Fluid Temperature Range (NBR Seals) | -20°C to 80°C (-4°F to 176°F) |
| Fluid Temperature Range (FPM Seals) | -20°C to 100°C (-4°F to 212°F) |
| Viscosity Range | 15-75 mm²/s (cst) operating; Min. 12 mm²/s; Max. 400 mm²/s |
| Ambient Temperature Range | -40°C to 60°C (-40°F to 140°F) |
Core Features & Market Positioning
The YOULI SN-4/11S stands out in the market due to its robust construction and advanced features. It is designed for high efficiency and a long service life, minimizing downtime and operational costs. The valve's market positioning is defined by its ability to integrate seamlessly into various hydraulic systems, offering precise control and dependable performance. Its versatility is further enhanced by the availability of multiple actuation methods, including manual, pneumatic, hydraulic, and electro-hydraulic options. The hardened, high-accuracy spool ensures consistent operation over time, a critical factor in precision-demanding applications. As a sectional directional control valve, the SN-4 series is built for adaptability and multi-functional control, addressing complex hydraulic circuit requirements.
Key Application Scenarios
This hydraulic valve is extensively utilized in a variety of industrial and mobile applications where precise fluid power control is essential. Its robust design makes it suitable for heavy-duty tasks. Common application areas include:
Construction Equipment: Operating hydraulic functions on excavators, loaders, and dozers. Agricultural Machinery: Controlling implements and systems on tractors and harvesters. Material Handling: Powering systems in forklifts, cranes, and lifting equipment. Specialty Vehicles: Such as garbage trucks, drilling rigs, and rescue vehicles, where multiple hydraulic functions need coordinated control. Industrial Automation: Integrating into manufacturing processes requiring reliable hydraulic actuation.
Practical System Integration Guidance
Integrating the YOULI SN-4/11S into existing hydraulic systems is straightforward due to its sub-plate mounting design. The valve is engineered with various port and circuit valve options, allowing for tailored configurations to meet specific system demands. It is advisable to ensure system fluid cleanliness aligns with the recommended filtration standards (e.g., 10 to NAS 1638) to maintain optimal performance and longevity. The multiple working sections available in the SN-4 series allow for system scalability, accommodating increasing operational needs.
Operation and Risk Mitigation
Safe and efficient operation of the YOULI SN-4/11S hydraulic valve relies on adherence to proper procedures and understanding its capabilities. Each section is equipped with an independent load check valve, and optional port relief valves are available for enhanced protection against over-pressurization. The maximum operating pressure should not be exceeded to prevent component damage and potential system failure. Proper fluid selection and maintenance are crucial; using fluids within the specified viscosity and temperature ranges, and with appropriate seals (NBR or FPM), is recommended. Troubleshooting typically involves checking for fluid contamination, spool spool binding, or external leakage, common issues in hydraulic systems.
Scalability & Long-Term Value
The sectional design of the YOULI SN-4/11S offers significant advantages in terms of scalability and long-term value. As operational requirements evolve, additional working sections can be added to the valve manifold, expanding its control capabilities without necessitating a complete system overhaul. This modular approach ensures compatibility with existing hydraulic platforms and provides a cost-effective upgrade path. YOULI's commitment to quality manufacturing and durable components translates to extended product life, reducing the total cost of ownership.
Frequently Asked Questions (FAQs)
Q1: What is the primary function of the YOULI SN-4/11S hydraulic valve?
The YOULI SN-4/11S is a multiple control hydraulic valve designed for directional control in various hydraulic systems. Its primary function is to direct and regulate fluid flow to actuators, enabling precise operation of machinery.
This valve is typically employed in applications requiring multiple synchronized or independent hydraulic functions. It allows operators to manage complex movements with accuracy and efficiency.
Its sectional design permits customization for specific task requirements, making it highly adaptable for both mobile and industrial machinery.
Q2: What are the key advantages of using the YOULI SN-4/11S valve?
A key advantage is its high efficiency and low pressure drop, which optimize system performance and reduce energy loss. The valve's compact construction also saves valuable space in machinery.
Another significant benefit is its long service life, attributed to high-quality materials and robust engineering. This durability translates to reduced maintenance costs and increased operational uptime.
The availability of multiple actuation methods (manual, pneumatic, hydraulic, electro-hydraulic) provides flexibility in system design and operation, catering to diverse application needs.
Q3: Can the YOULI SN-4/11S valve be used in high-pressure hydraulic systems?
Yes, the YOULI SN-4/11S valve is rated for a maximum operating pressure of 315 bar (4600 psi). This makes it suitable for many demanding high-pressure industrial and mobile hydraulic applications.
It's crucial to ensure that the system's operating pressure does not exceed this specified limit to prevent damage. Always consult system design parameters for safe operation.
The valve's robust construction and internal components are designed to withstand these pressures reliably, contributing to its durability and performance in rigorous environments.
Q4: What types of fluids are compatible with the YOULI SN-4/11S valve?
The valve is compatible with hydraulic fluids within a specific viscosity range of 15 to 75 mm²/s (cst) for optimal operation. It can also handle fluids with a minimum viscosity of 12 mm²/s and a maximum of 400 mm²/s.
Temperature is also a critical factor; the fluid temperature range varies depending on the seal material used. With NBR seals, it operates from -20°C to 80°C, and with FPM seals, from -20°C to 100°C.
It's essential to use hydraulic fluids that meet industry standards and are compatible with the selected seal materials to ensure longevity and prevent seal degradation.
Q5: How does the sectional design of the SN-4/11S contribute to its application flexibility?
The sectional design allows users to configure the valve with multiple working sections, each performing a specific function. This modularity enables the creation of highly customized control solutions.
This feature makes the valve highly scalable; as system requirements change or expand, additional sections can be added to the manifold. This avoids the need for replacing the entire valve unit.
It provides a multi-function control valve method, solving complex hydraulic circuit system requirements and offering adaptability across a wide range of machinery and industrial processes.
Q6: What actuation methods are available for the YOULI SN-4/11S valve?
The YOULI SN-4/11S valve supports a variety of actuation methods to suit different control preferences and system integrations. These include manual operation via a lever or handle.
It can also be operated pneumatically, hydraulically, or electro-hydraulically, offering advanced control options for automated systems. These options provide flexibility in how the valve is commanded.
The selection of the actuation method depends on the specific application's requirements for control precision, speed, and integration with existing automation systems.
Q7: What are the typical applications for the YOULI SN-4/11S hydraulic valve?
This valve is commonly found in mobile hydraulic applications, such as construction equipment like excavators and loaders, and agricultural machinery. It's also used in material handling equipment.
It is also integral to the operation of specialty vehicles, including garbage trucks, drilling rigs, and cranes, where precise control of multiple hydraulic functions is critical.
Furthermore, its robust design and precise control capabilities make it suitable for various industrial automation processes and manufacturing equipment.
Q8: What is the maximum flow rate handled by the YOULI SN-4/11S valve?
The YOULI SN-4/11S sectional directional control valve has a nominal flow rate of 80 liters per minute (L/min). This is equivalent to approximately 21 US gallons per minute (US gpm).
This flow rate capacity ensures efficient operation for a wide range of medium-duty hydraulic applications. It allows for effective power delivery to actuators without significant flow restriction.
It's important to match the system's flow requirements to the valve's nominal capacity to ensure optimal performance and avoid overloading the valve.
Q9: Does the YOULI SN-4/11S valve include pressure relief features?
Yes, the valve is equipped with an inlet cover that features a main pressure relief valve. This protects the hydraulic system from over-pressurization by venting excess fluid.
Additionally, optional port relief valves can be specified for each working section. These provide localized over-pressure protection, further enhancing system safety and component longevity.
These integrated and optional pressure relief features are crucial for mitigating risks associated with pressure spikes and ensuring the safe and reliable operation of the hydraulic machinery.
Q10: What are the temperature operating limits for the YOULI SN-4/11S valve?
The valve can operate within an ambient temperature range of -40°C to 60°C (-40°F to 140°F). This wide range allows for use in diverse environmental conditions.
The fluid temperature operating range depends on the seal material. For standard NBR (BUNA-N) seals, the range is -20°C to 80°C (-4°F to 176°F). Using FPM (VITON) seals extends this to -20°C to 100°C (-4°F to 212°F).
Maintaining the fluid within these specified temperature limits is vital for the valve's performance, seal integrity, and overall system reliability.
