YOULI SN-3/9S Standard Hydraulic Multiple Control Valve
The YOULI SN-3/9S Standard Hydraulic Multiple Control Valve stands as a robust solution for precise hydraulic system management. This valve series is engineered for demanding industrial applications, offering exceptional control, reliability, and durability. With a focus on efficiency and operational integrity, the SN-3/9S model is designed to meet rigorous performance standards across various sectors.
Product Specifications
| Feature | Specification |
| :-------------------- | :----------------------------------------------- |
| Model | SN-3/9S |
| Type | Standard Hydraulic Multiple Control Valve |
| Actuation Type | Solenoid, Manual Lever |
| Number of Positions | Typically 3-position |
| Number of Spools | Varies, often 4-spool configurations available |
| Flow Rate | Up to 90 L/min (23.8 GPM) |
| Max Pressure | 210 bar (3045 PSI) |
| Port Size | P, T: 1"; A, B: 3/4" (common configuration) |
| Mounting Pattern | SAE standard (e.g., ISO 4401-05-04-0-05) |
| Coil Voltage | DC 12V, 24V; AC 110V, 220V (common options) |
| Duty Cycle | Continuous duty solenoid (100% ED) |
| Seal Material | Viton, Nitrile (common options) |
Core Features & Market Positioning
The YOULI SN-3/9S distinguishes itself through its robust construction, utilizing high-quality materials to ensure longevity in harsh industrial environments. Its electro-hydraulic actuation offers precise control over hydraulic circuits, enabling efficient operation and reduced energy consumption. This multiple control valve is positioned as a reliable, cost-effective component for original equipment manufacturers (OEMs) and end-users seeking dependable performance. The inherent design prioritizes ease of maintenance and integration, further solidifying its market standing as a practical and high-value solution. The SN-3/9S series is recognized for its consistent performance and ability to handle demanding flow and pressure requirements.
Key Application Scenarios
This versatile hydraulic control valve finds extensive use across a spectrum of heavy industries. It is a critical component in mobile hydraulics, powering applications such as excavators, loaders, and agricultural machinery where precise directional and flow control is paramount. In industrial settings, the SN-3/9S is frequently integrated into machine tools, injection molding machines, and material handling equipment, facilitating complex automated processes. Its ability to manage multiple functions with a single valve body simplifies system design and reduces potential leak points, making it ideal for robust hydraulic power units and integrated systems.
Practical System Integration Guidance
Integrating the YOULI SN-3/9S hydraulic valve into an existing system requires careful attention to port identification and hydraulic circuit design. Ensure the power supply voltage for the solenoid coils precisely matches the selected valve specifications to prevent premature failure. Proper manifold mounting, using the specified SAE pattern, is crucial for leak-free operation. When wiring the solenoids, adherence to the correct electrical schematics is essential; typically, a power and ground connection for DC coils or live and neutral for AC coils will be required, often controlled by relays or PLC outputs. For optimal performance, prime the hydraulic system to purge air before initial operation.
Operation and Risk Mitigation
Safe operation of the YOULI SN-3/9S valve hinges on understanding its operational parameters and potential failure modes. Always ensure the hydraulic fluid is clean and within the recommended viscosity range for the operating temperature to prevent spool sticking or internal leakage. Regularly inspect electrical connections for corrosion or damage, and verify solenoid functionality. Over-pressurization is a primary risk; confirm that system relief valves are correctly set below the maximum rated pressure of the SN-3/9S valve. During maintenance, always de-energize the solenoids and relieve hydraulic pressure before attempting any disassembly or component replacement.
Scalability & Long-Term Value
The YOULI SN-3/9S hydraulic multiple control valve offers significant long-term value through its modular design and compatibility. The standard mounting pattern ensures interchangeability with other valves conforming to the same ISO standard, facilitating upgrades or replacements. While the SN-3/9S is a highly capable standalone component, its integration into modern industrial control systems is straightforward. With appropriate interface hardware and software, it can be readily incorporated into PLC-driven automation or even connected to IIoT platforms for remote monitoring and predictive maintenance, extending its utility well into the future.
Frequently Asked Questions (FAQs)
What is the maximum flow rate for the YOULI SN-3/9S valve?
The YOULI SN-3/9S hydraulic valve is capable of handling flow rates up to 90 liters per minute.
This specification is crucial for ensuring system efficiency and preventing component overheating.
Proper sizing ensures the valve meets the hydraulic demand of your specific application.
What are the typical application areas for the SN-3/9S control valve?
This valve is commonly employed in mobile hydraulic equipment like excavators and agricultural machinery.
It also serves critical functions in industrial automation, including machine tools and presses.
Its versatility makes it suitable for any system requiring precise hydraulic directional control.
How do I ensure correct electrical connection for the solenoid coils?
Verify the solenoid coil voltage matches your power supply precisely.
Consult the wiring diagram provided by YOULI or your system integrator.
Incorrect voltage can lead to coil burnout or erratic valve operation.
Can the YOULI SN-3/9S valve be used in high-pressure systems?
Yes, the SN-3/9S is rated for a maximum operating pressure of 210 bar (3045 PSI).
Always ensure system relief valves are set below this maximum to protect the valve.
Exceeding the rated pressure can cause valve damage or system failure.
What maintenance is recommended for the SN-3/9S control valve?
Regularly inspect electrical connections and the valve body for leaks.
Maintain clean hydraulic fluid to prevent internal spool contamination.
Periodic functional checks can help identify potential issues early.
What type of hydraulic fluid is best suited for this valve?
The valve is designed to operate with standard hydraulic oils within specified viscosity ranges.
Always refer to the manufacturer's guidelines for optimal fluid selection.
Using incorrect fluid can impact valve performance and longevity.
Does the SN-3/9S valve support manual override functionality?
Many configurations of the SN-3/9S do offer manual override options.
This feature allows for manual valve operation during power failures or maintenance.
Check the specific model designation for confirmation of manual override availability.
What is the mounting standard for the YOULI SN-3/9S valve?
The SN-3/9S typically adheres to SAE standards for hydraulic valve mounting patterns.
This often corresponds to ISO 4401 standards, facilitating interchangeability.
Ensure your manifold block matches the valve's specified mounting interface.
How does the number of spools affect the valve's application?
More spools allow for control of a greater number of hydraulic functions simultaneously.
This reduces the need for multiple single valves, simplifying system plumbing.
The number of spools directly impacts the complexity and capabilities of the hydraulic circuit.
What are the advantages of using a multiple control valve like the SN-3/9S?
It consolidates multiple functions into a single unit, saving space and reducing components.
This leads to simpler installation, fewer leak paths, and potentially lower overall system cost.
Precise, synchronized control of multiple actuators is also a key benefit.
