YOULI SN-3/12S Hydraulic Control Valve
The YOULI SN-3/12S Hydraulic Control Valve is a sophisticated component engineered for precise fluid power management. This sectional directional control valve offers a robust solution for a wide array of industrial and mobile hydraulic applications. Its design emphasizes efficiency, reliability, and adaptability, making it a preferred choice for systems demanding accurate control over actuators. The SN-3/12S stands out with its compact construction, low pressure drop, and hardened spool for extended accuracy and service life.
Product Specifications
| Parameter | Specification |
| :------------------------ | :------------------------------------------------- |
| Nominal Flow Rate | 50 L/min (13 US gpm) |
| Maximum Operating Pressure | 315 bar (4600 psi) for parallel/tandem circuit; 250 bar (3050 psi) for series circuit |
| Maximum Back Pressure | 25 bar (360 psi) on outlet port T |
| Fluid Temperature Range | -20°C to 80°C (-4°F to 176°F) with NBR seals; -20°C to 100°C (-4°F to 212°F) with FPM seals |
| 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-3/12S Hydraulic Control Valve is engineered with a focus on delivering high performance and long-term operational stability. Its core strengths lie in its versatility and robust design, positioning it as a competitive offering in the industrial hydraulics market. Key differentiators include its compact build, which facilitates easier integration into space-constrained systems, and its inherently low pressure drop, contributing to improved energy efficiency. The valve's spool is precision-hardened for enhanced durability and sustained accuracy, ensuring consistent performance over its service life. YOULI's extensive experience, spanning over three decades, in manufacturing hydraulic control valves underpins the product's reliability and professional quality. This dedication to quality control at every production stage ensures that YOULI products meet the finest tolerances, a critical factor for industrial applications where precision and dependability are paramount.
Key Application Scenarios
The SN-3/12S Hydraulic Control Valve's adaptability makes it suitable for a broad spectrum of demanding applications. It is widely utilized in construction machinery, sanitation vehicles, and drilling equipment, where precise control of hydraulic functions is essential for efficient operation and safety. Its sectional design allows for customization, enabling users to configure the valve for specific tasks such as operating hydraulic cylinders, motors, or other actuators in complex machinery. This versatility extends to agricultural machines, dump trucks, and special-purpose vehicles, underscoring its broad applicability in mobile hydraulics. The valve's ability to handle high pressures and its variety of control options (manual, pneumatic, electro-hydraulic) further enhance its suitability for diverse operational environments.
Practical System Integration Guidance
Integrating the YOULI SN-3/12S Hydraulic Control Valve into existing hydraulic systems is streamlined due to its sub-plate mounting design and standardized porting options. System designers and technicians can configure the valve by selecting specific sections, spool functions (e.g., A, O, Y, P), and control types to match the application's requirements. The availability of various auxiliary valves, such as overload and anti-cavitation valves, allows for fine-tuning system performance and protection. For electro-hydraulic actuation, appropriate electrical control kits, including pilot and drain lines with backpressure valves, are available, typically operating at 12/24 VDC. Careful consideration of fluid viscosity and temperature ranges is crucial for optimal performance and longevity, ensuring the chosen hydraulic fluid falls within the specified operating parameters.
Operation and Risk Mitigation
Proper operation of the YOULI SN-3/12S Hydraulic Control Valve is key to ensuring system safety and preventing operational failures. While the valve itself is designed for reliability, common troubleshooting scenarios often involve hydraulic contamination or electrical issues if electro-hydraulic versions are used. To mitigate risks associated with contamination, regular inspection and maintenance of the hydraulic system's oil reservoir and filter are essential. Draining old oil, cleaning contaminants, and replacing filters proactively can prevent issues like sticking spools, which can impair valve function. For electrically actuated models, verifying voltage and amperage, as well as inspecting wiring connections and cables for damage, are critical steps in troubleshooting and risk mitigation. Adhering to the specified maximum operating and back pressures prevents over-pressurization, safeguarding both the valve and connected components.
Scalability & Long-Term Value
The sectional nature of the YOULI SN-3/12S Hydraulic Control Valve offers significant scalability and long-term value. Its modular design allows for the addition or reconfiguration of sections, enabling hydraulic systems to adapt to evolving operational demands or increased complexity without requiring a complete valve replacement. This flexibility is particularly advantageous in dynamic industrial environments where machinery may undergo upgrades or modifications. Furthermore, YOULI's commitment to manufacturing high-quality hydraulic components ensures compatibility with established hydraulic systems and components, facilitating seamless integration and future expansion. As industries move towards greater automation and connectivity, the adaptability of such sectional valves supports integration with IIoT and digital monitoring solutions, enhancing overall system efficiency and predictive maintenance capabilities.
Frequently Asked Questions (FAQs)
Q1: What is the primary function of the YOULI SN-3/12S Hydraulic Control Valve?
The SN-3/12S is a directional control valve that directs hydraulic fluid flow. It controls the movement, speed, and force of hydraulic actuators like cylinders and motors. Its primary role is to enable precise and reliable operation of machinery.
Q2: Can the YOULI SN-3/12S valve be customized for specific applications?
Yes, its sectional design allows extensive customization. Users can select from various spool functions, control types, and auxiliary valves. This ensures the valve precisely matches the hydraulic system's unique requirements.
Q3: What are the key advantages of using a sectional control valve like the SN-3/12S?
Sectional valves offer modularity for easy expansion and adaptation. They feature compact construction, low pressure drop, and high efficiency. The hardened spool ensures long-term accuracy and durability.
Q4: What is the maximum operating pressure for the YOULI SN-3/12S?
The valve can operate at a maximum of 315 bar (4600 psi) for parallel or tandem circuits. For series circuits, the maximum operating pressure is 250 bar (3050 psi).
Q5: What types of fluid can be used with the YOULI SN-3/12S valve?
It is designed for mineral oils within a specified viscosity range of 15-75 mm²/s. Compatibility with other fluid types should be confirmed with the manufacturer, considering seal material and operating temperatures.
Q6: How does the sectional design of the SN-3/12S benefit system scalability?
The modular, sectional approach allows adding or reconfiguring valve sections. This enables hydraulic systems to grow and adapt to changing demands over time. It avoids costly full valve replacements for system upgrades.
Q7: What are common control methods available for the SN-3/12S?
The SN-3/12S supports multiple actuation methods. These include manual, pneumatic, hydraulic pilot control, and electro-hydraulic control. This versatility suits various operational environments and control preferences.
Q8: What is the recommended fluid temperature range for this valve?
With standard NBR seals, the fluid temperature range is -20°C to 80°C (-4°F to 176°F). For higher temperatures, FPM seals extend this range to -20°C to 100°C (-4°F to 212°F).
Q9: How can I troubleshoot issues with the YOULI SN-3/12S control valve?
Common issues often stem from hydraulic contamination or electrical faults. Regularly maintain the hydraulic system, check oil cleanliness, and inspect electrical connections for electro-hydraulic models.
Q10: Is the YOULI SN-3/12S suitable for mobile hydraulic applications?
Absolutely. Its robust design, compact structure, and wide range of applications, including construction machinery, sanitation vehicles, and special-purpose vehicles, highlight its suitability for mobile hydraulics.
