YOULI SN-3/2S-4/28L/18L/G334 Multiple Control Hydraulic Valve Bank

The YOULI SN-3/2S-4/28L/18L/G334 Multiple Control Hydraulic Valve Bank represents a sophisticated solution for managing hydraulic power in demanding industrial applications. This valve bank is engineered for reliability and efficiency, offering precise control over hydraulic actuators. Its core advantages lie in its modular design, allowing for customization and scalability, alongside robust construction that ensures a long service life. Key technical parameters include a nominal flow rate of 50 L/min (13 US gpm) and a maximum operating pressure of 315 bar (4600 psi) for parallel or tandem circuits, and 250 bar (3050 psi) for series circuits. The fluid temperature range is -20°C to 80°C with NBR seals and up to 100°C with FPM seals.

Product Specifications

| Parameter              | Specification                                |

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

| Model                  | SN-3/2S-4/28L/18L/G334                       |

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

| Max. Operating Pressure | 315 bar (4600 psi) (Parallel/Tandem)     |

|                        | 250 bar (3050 psi) (Series)              |

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

| Fluid Temperature      | -20°C to 80°C (NBR seals)                |

|                        | -20°C to 100°C (FPM seals)               |

| Viscosity              | 15-75 mm²/s (operating range)            |

|                        | Min. 12 mm²/s, Max. 400 mm²/s            |

| Ambient Temperature    | -40°C to 60°C [-40°F to 140°F]           |

Core Features & Market Positioning

The YOULI SN-3/2S-4/28L/18L/G334 valve bank is distinguished by its sectional design, enabling users to configure the valve bank with a specific number of working sections to meet precise application needs. This modularity is a significant competitive advantage, allowing for flexibility in system design and reducing the need for custom fabrication. The inherent low pressure drop and high efficiency contribute to reduced energy consumption and improved overall system performance, positioning it as a cost-effective and technically superior choice. YOULI's long-standing expertise, dating back to 1975, in manufacturing hydraulic control valves underscores its commitment to quality and precision engineering. This dedication is reflected in features like hardened spools for enhanced durability and accuracy, ensuring consistent operation over extended periods.

Key Application Scenarios

This versatile hydraulic valve bank finds critical applications across various industrial sectors. Its robust design and precise control capabilities make it ideal for heavy-duty machinery such as drilling rigs, garbage trucks, and construction equipment where reliable hydraulic actuation is paramount. In mobile hydraulic systems, the SN-3/2S-4/28L/18L/G334 facilitates complex functionalities, including actuation of lifting mechanisms, steering systems, and material handling equipment. Its adaptability also extends to manufacturing automation, where it can be integrated into assembly lines, robotics, and specialized industrial machinery requiring precise fluid power control. The ability to handle various operating pressures and flow rates ensures its suitability for a wide array of hydraulic circuits, from simple single-acting cylinders to complex multi-actuator systems.

Practical System Integration Guidance

Integrating the YOULI SN-3/2S-4/28L/18L/G334 valve bank into existing hydraulic systems is streamlined by its sub-plate mounting design, which simplifies installation and maintenance. The valve bank offers multiple actuation options, including manual, pneumatic, hydraulic, and electro-hydraulic controls, providing flexibility in system architecture and operator interface. For electro-hydraulic actuation, proper wiring of solenoids and control modules is crucial. Users must ensure correct voltage and current supply to the solenoids, typically 12/24 VDC for standard electro-hydraulic kits. Careful consideration of porting configurations (e.g., G334 indicating specific port types) and circuit valve selections during the ordering process ensures seamless integration with system lines and actuators. Referencing the YOULI ordering code system is essential for specifying the exact configuration required, including the number of working sections (e.g., '2S' for two sections) and the type of inlet and outlet covers.

Operation and Risk Mitigation

Safe and efficient operation of the YOULI SN-3/2S-4/28L/18L/G334 hydraulic valve bank relies on adherence to recommended operating parameters and proactive maintenance. Key to risk mitigation is ensuring the hydraulic fluid is within the specified temperature and viscosity ranges to prevent premature wear and ensure consistent valve performance. Regular inspection for leaks and monitoring of system pressure are essential. While specific fault codes are not typically documented for this type of valve, common troubleshooting steps involve verifying electrical connections for electro-hydraulic controls, checking for spool contamination or blockage, and ensuring adequate fluid supply and return flow. Over-pressurization is a primary risk; the integrated main pressure relief valve and optional port relief valves are critical safety features that must be properly set and maintained to protect the system from damage. The hardened spool design contributes to long-term reliability, but contamination remains a principal cause of operational issues.

Scalability & Long-Term Value

The sectional nature of the YOULI SN-3/2S-4/28L/18L/G334 valve bank offers significant scalability, allowing users to expand or reconfigure hydraulic functions as system requirements evolve. Additional sections can be added to accommodate more actuators or complex control sequences. This modular approach maximizes the long-term value by preventing the need for complete system overhauls when functional requirements change. Compatibility with a wide range of hydraulic components and systems, coupled with YOULI's reputation for durable manufacturing, ensures that this valve bank remains a reliable asset for years. While not explicitly detailed in the provided snippets, integration with modern IIoT or digital control systems would typically be achieved through electro-hydraulic actuation interfaces, allowing for remote monitoring and control capabilities.

FAQs

What is the maximum operating pressure for the YOULI SN-3/2S-4/28L/18L/G334 hydraulic valve bank?

The maximum operating pressure for this valve bank is 315 bar (4600 psi) when configured for parallel or tandem circuits. For series circuits, the maximum operating pressure is 250 bar (3050 psi). These ratings ensure robust performance in high-pressure hydraulic applications.

For series circuits, the maximum operating pressure is rated at 250 bar (3050 psi). This distinction allows for tailored system design based on specific circuit configurations and performance demands.

These pressure ratings are critical for ensuring system integrity and safety, preventing component failure under load. Always consult the full product documentation for specific application limits.

What are the key features of the YOULI SN-3/2S-4/28L/18L/G334 valve bank?

Key features include its sectional design for modularity and customization. It offers low pressure drop, high efficiency, and a long service life due to its robust construction.

The valve bank supports multiple operation methods, including manual, pneumatic, hydraulic, and electro-hydraulic control. This versatility allows for integration into diverse control system architectures.

Hardened spools enhance accuracy and durability for long-term reliable performance. The sub-plate mounting design simplifies installation and maintenance procedures.

What industries commonly use the YOULI SN-3/2S-4/28L/18L/G334 valve bank?

This valve bank is widely used in heavy-duty mobile equipment, such as drilling rigs and garbage trucks. It's also found in construction machinery and other hydraulic systems.

Manufacturing automation and industrial machinery benefit from its precise control capabilities. Applications include assembly lines and specialized equipment requiring fluid power management.

Its versatility supports diverse hydraulic applications, from material handling to robotics, making it a staple in demanding industrial environments.

How can the YOULI SN-3/2S-4/28L/18L/G334 valve bank be controlled?

The valve bank supports several control methods. These include manual, pneumatic, hydraulic, and electro-hydraulic actuation options for flexible system integration.

Electro-hydraulic control utilizes solenoids for electrical signal activation. This is common for automated systems and integration with PLCs or other control units.

The choice of control method depends on the application's requirements for automation, operator interface, and system complexity.

What is the nominal flow rate of this valve bank?

The YOULI SN-3/2S-4/28L/18L/G334 hydraulic valve bank has a nominal flow rate of 50 liters per minute. This translates to approximately 13 US gallons per minute.

This flow rate is suitable for a wide range of industrial and mobile hydraulic applications. It balances performance with efficiency for many common actuator requirements.

Properly sizing the valve bank based on flow rate is essential for optimal system performance and to avoid cavitation or excessive pressure drop.

What are the temperature and viscosity operating ranges?

With NBR seals, the fluid temperature range is -20°C to 80°C. Using FPM seals extends this to -20°C to 100°C. The operating viscosity range is 15-75 mm²/s.

The minimum viscosity is 12 mm²/s, and the maximum is 400 mm²/s. These parameters ensure reliable operation across various fluid conditions and environmental temperatures.

Maintaining fluid within these specifications is crucial for valve longevity and consistent performance. Ambient temperature range is -40°C to 60°C.

Can the YOULI SN-3/2S-4/28L/18L/G334 valve bank be customized?

Yes, its sectional design allows for significant customization. Users can configure the number and type of working sections to precisely match application needs.

Additional options for spool functions, port relief, and outlet configurations are available. This modularity ensures a tailored solution for complex hydraulic circuits.

This flexibility makes the valve bank highly adaptable, reducing the need for specialized or custom-built valve assemblies.

What is the significance of the 'SN-3/2S-4/28L/18L/G334' model number?

This code denotes specific configurations. 'SN-3' indicates the valve series. '2S' specifies two working sections. '4' might refer to port size or a specific feature.

'28L' and '18L' likely denote specific types or configurations of the working sections. 'G334' likely refers to the port threading or connection type.

Understanding this coding system is vital for ordering the correct valve bank and ensuring compatibility with system components.

How is the valve bank mounted?

The YOULI SN-3/2S-4/28L/18L/G334 hydraulic valve bank features a sub-plate mounting design. This method simplifies installation onto a manifold or machine structure.

Sub-plate mounting ensures a secure and leak-free connection. It also facilitates easier removal and maintenance of individual valve sections or the entire bank.

This design is standard for many industrial hydraulic control valves, promoting interchangeability and efficient system assembly.

What maintenance is required for this valve bank?

Regular inspection for leaks and monitoring of system pressure are essential. Maintaining clean hydraulic fluid within specified temperature and viscosity ranges is critical.

Checking electrical connections for electro-hydraulic controls and ensuring proper spool movement are important. Adherence to manufacturer guidelines for service intervals is recommended.

While the hardened spool offers durability, contamination is a common cause of issues; therefore, filtration and fluid cleanliness are paramount.