YOULI SN-4/4S-3/28L/28L/18L/18L/G446 Heavy Duty Multi-path Hydraulic Valve Bank

The YOULI SN-4/4S-3/28L/28L/18L/18L/G446 Heavy Duty Multi-path Hydraulic Valve Bank represents a robust solution for demanding industrial applications requiring precise hydraulic control. This valve bank is engineered for reliability and performance, featuring a multi-path design that allows for centralized management of various hydraulic functions within a system. Key advantages include its heavy-duty construction, ensuring durability in harsh environments, and its multi-path configuration for efficient fluid distribution. The technical specifications highlight a nominal flow rate of 80 L/min (21 US gpm) and an operating pressure of up to 315 bar (4600 psi), with a maximum back pressure on the T port of 25 bar (360 psi). These parameters underscore its capability to handle significant hydraulic loads. The fluid temperature range is -20°C to 80°C with NBR seals and -20°C to 100°C with FPM seals, while the ambient temperature range is -40°C to 60°C, providing operational flexibility across various conditions.

Product Specifications

| Specification            | Value                                                                  |

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

| Model                    | YOULI SN-4/4S-3/28L/28L/18L/18L/G446                                     |

| Type                     | Heavy Duty Multi-path Hydraulic Valve Bank                             |

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

| Operating Pressure (Max) | 315 bar (4600 psi)                                                     |

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

| Fluid Temperature Range  | -20°C to 80°C (NBR seals); -20°C to 100°C (FPM seals)                   |

| Ambient Temperature Range| -40°C to 60°C                                                          |

| Viscosity Operating Range| 15-75 mm²/s (15-75 cSt)                                                |

| Viscosity Min            | 12 mm²/s (12 cSt)                                                      |

| Viscosity Max            | 400 mm²/s (400 cSt)                                                    |

| Port Type                | G446 (BSP Ports)                                                       |

| Section Configuration  | 3 Inlet cover with main pressure relief valve, multiple working sections |

Core Features & Market Positioning

The YOULI SN-4/4S-3/28L/28L/18L/18L/G446 is positioned as a high-performance, heavy-duty component designed for applications demanding precision and durability. Its sectional directional control valve design allows for customization and modularity, enabling users to configure the valve bank according to specific operational needs. This adaptability is a key differentiator in the market, allowing it to serve a broad spectrum of industries. The SN-4 series, known for its compact construction and low pressure drop, contributes to overall system efficiency and longevity. YOULI Hydraulic emphasizes professional quality and customer satisfaction, positioning their products as reliable solutions for complex hydraulic systems. The availability of various operating methods, including manual, pneumatic, hydraulic, and electro-hydraulic options, further enhances its market appeal by offering flexibility in control.

Key Application Scenarios

This heavy-duty hydraulic valve bank is ideally suited for a variety of demanding industrial and mobile equipment applications. Its robust design and multi-path functionality make it a prime choice for:

  Construction Machinery: Excavators, loaders, dozers, and graders rely on precise hydraulic control for boom, bucket, and steering functions.  Agricultural Equipment: Tractors, harvesters, and other farm machinery utilize these valves for implement control, lifting, and steering.  Material Handling: Cranes, forklifts, and lifting equipment benefit from the centralized control and power delivery capabilities.  Waste Management: Garbage trucks and refuse collection vehicles require reliable valve banks for their complex hydraulic operations.  Drilling Rigs and Mining Equipment: These industries demand high-pressure capabilities and rugged construction, features well-met by the SN-4 series.  Leg Loops and Other Specialized Vehicles: The versatility of the SN-4 series allows integration into specialized mobile systems.

Practical System Integration Guidance

Integrating the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 valve bank involves careful consideration of port connections and system hydraulics. The "G446" designation indicates BSP (British Standard Pipe) ports, ensuring compatibility with standard fittings. The ordering code structure, such as "SN-4 / 2S - 3 / 18L / 28L / G-4-6 / M3," provides insight into the configuration, where "2S" denotes the number of working sections, "3" indicates the inlet cover with a main pressure relief valve, "18L" and "28L" represent the first and subsequent sections respectively, "G-4-6" denotes BSP ports, and "M3" signifies the outlet cover. Proper system design should account for the nominal flow rate of 80 L/min and the maximum operating pressure of 315 bar. Ensuring correct fluid type (mineral oil) and maintaining viscosity within the specified operating range (15-75 cSt) is crucial for optimal performance and longevity. For electro-hydraulic control options, attention must be paid to voltage requirements (e.g., 12/24 VDC) for solenoids.

Operation and Risk Mitigation

Safe operation of the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 valve bank relies on understanding its functionalities and potential failure modes. The presence of a main pressure relief valve in the inlet cover provides fundamental overpressure protection for the system. Additional optional port relief valves can be specified for enhanced protection within individual sections. The valve bank's design includes independent load check valves in each section, which are critical for load-holding capabilities and preventing uncontrolled descent of actuators, especially in gravity-loaded scenarios. It is imperative to adhere to the recommended operating parameters, including fluid temperature (-20°C to 80°C/100°C) and viscosity ranges, to prevent internal leakage or component wear. Regular inspection for fluid leaks and timely maintenance of seals and connections are vital risk mitigation strategies. In case of system malfunction, troubleshooting should focus on verifying electrical connections for solenoid-actuated valves, checking for obstructions in the hydraulic lines, and confirming the proper function of the relief valve settings.

Scalability & Long-Term Value

The modular, sectional design of the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 hydraulic valve bank offers significant scalability and long-term value. Users can expand the system's capabilities by adding or reconfiguring working sections as application requirements evolve. This modularity minimizes the need for complete system overhauls when functional needs change, making it a cost-effective solution over the equipment's lifecycle. Compatibility with various actuation methods—manual, pneumatic, hydraulic, and electro-hydraulic—allows for integration with existing control systems or future upgrades to more advanced automation, including potential integration with IIoT platforms through electro-hydraulic interfaces. The robust construction and availability of spare parts further contribute to its long-term value, ensuring sustained performance and minimizing downtime.

FAQs

Q1: What is the primary function of a multi-path hydraulic valve bank like the YOULI SN-4/4S-3/28L/28L/18L/18L/G446?

A multi-path hydraulic valve bank serves as the central control hub for distributing hydraulic fluid to multiple actuators or circuits within a machine. It enables simultaneous or sequential operation of various functions, such as lifting, lowering, extending, and retracting, by precisely directing fluid flow and pressure.

This allows for complex coordinated movements and efficient power management, crucial for optimizing the performance and utility of heavy machinery and industrial equipment. The SN-4 series, with its robust design, excels in these demanding applications.

Its core role is to consolidate multiple valve functions into a single, compact unit, simplifying system plumbing and control architecture. This leads to improved efficiency, reduced leak points, and easier maintenance compared to discrete valve installations.

Q2: What are the key specifications to consider when selecting the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 for an application?

Critical specifications include the nominal flow rate of 80 L/min (21 US gpm) and the maximum operating pressure of 315 bar (4600 psi). Understanding these values ensures the valve bank can handle the required hydraulic power for your actuators.

Also consider the maximum back pressure on the outlet port (T), which is 25 bar (360 psi), and the fluid and ambient temperature ranges (-20°C to 80°C/100°C and -40°C to 60°C, respectively) to match your operating environment.

Port type (BSP in this case, G446) and the configuration of working sections, inlet/outlet covers, and optional features like pressure relief valves are vital for proper system integration and functionality.

Q3: What types of industries commonly utilize the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 heavy-duty valve bank?

This heavy-duty valve bank is prevalent in sectors requiring robust hydraulic control for mobile and industrial machinery. This includes construction equipment like excavators and loaders.

It is also a key component in agricultural machinery, such as tractors and harvesters, as well as in material handling equipment like cranes and specialized lifting systems.

Furthermore, industries such as waste management (garbage trucks), drilling rigs, and mining operations benefit from its durability and multi-path control capabilities.

Q4: How does the sectional design of the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 contribute to its versatility?

The sectional design allows for a modular approach, enabling users to specify the exact number and type of working sections required for their application. This customizability ensures optimal system performance and cost-effectiveness.

Users can easily add or reconfigure sections to adapt to changing operational demands, providing scalability and future-proofing the hydraulic system. This modularity significantly reduces the need for extensive modifications or replacements.

This feature simplifies inventory management for OEMs and service centers, as standard sections can be combined to create a wide array of configurations, catering to diverse machine designs and functions.

Q5: What are the available actuation methods for the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 valve bank?

The SN-4 series supports a variety of actuation methods to suit different control preferences and system integrations. These include manual operation via levers for direct control.

Pneumatic, hydraulic pilot, and electro-hydraulic (solenoid) controls are also available, offering options for remote or automated operation. Solenoids often operate on standard 12V or 24V DC power.

This flexibility allows seamless integration into systems ranging from simple mechanical controls to complex, automated hydraulic circuits managed by PLCs or advanced control units.

Q6: What safety features are integrated into the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 valve bank?

A primary safety feature is the main pressure relief valve integrated into the inlet cover, which protects the system from over-pressurization by diverting excess fluid. Optional port relief valves can be added to individual sections for localized protection.

Each working section is equipped with an independent load check valve. This is crucial for load-holding capabilities, preventing unintended actuator movement, especially under gravity or hose-failure scenarios.

Adherence to operating specifications, correct fluid selection, and regular maintenance are critical for overall system safety. Proper installation and understanding of system dynamics further mitigate risks.

Q7: Can the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 valve bank be integrated with modern IIoT or digital control systems?

Yes, through its electro-hydraulic (solenoid) actuation options, the valve bank can be integrated with digital control systems. Solenoids can be electronically controlled by PLCs or other automation controllers.

This allows for remote operation, precise timing, and incorporation into automated sequences managed by programmable logic controllers. This bridges the gap between traditional hydraulics and modern digital manufacturing.

While the valve bank itself is mechanical, its compatibility with electrical signals enables it to be a component within a larger, digitally controlled system, facilitating data logging and remote monitoring of hydraulic functions.

Q8: What is the significance of the "G446" designation in the model number for the YOULI SN-4/4S-3/28L/28L/18L/18L/G446?

The "G446" in the model number typically refers to the type and size of the port connections on the valve bank. In this case, "G" commonly signifies BSP (British Standard Pipe) threads, which are widely used in many industrial applications.

The numerical part (e.g., 4-6) might specify the specific BSP thread sizes or patterns for the different ports on the valve bank, ensuring compatibility with standard hydraulic fittings and hoses.

Accurately identifying the port type and size is essential for correct plumbing and leak-free connections during system installation and maintenance, ensuring system integrity.

Q9: What are the typical maintenance requirements for the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 hydraulic valve bank?

Regular maintenance should focus on ensuring the integrity of the hydraulic fluid, as contaminated or degraded fluid can damage the valve spools and seals. This includes periodic fluid analysis and filter changes.

Visual inspection for external leaks around the valve bank and its connections is crucial. Promptly addressing any leaks prevents fluid loss and potential system contamination.

Checking the functionality of the pressure relief valve and other safety features periodically ensures they operate within their specified pressure ranges, safeguarding the system and its operators.

Q10: How does the operating pressure rating of 315 bar (4600 psi) benefit the YOULI SN-4/4S-3/28L/28L/18L/18L/G446 in heavy-duty applications?

The high operating pressure rating of 315 bar (4600 psi) signifies the valve bank's capability to handle substantial hydraulic forces. This is essential for actuating heavy loads in demanding industrial and mobile equipment.

This robust pressure capacity ensures reliable performance and longevity in applications that would quickly overwhelm lower-rated valves, reducing the risk of component failure under stress.

It allows for the design of more compact and efficient hydraulic cylinders and motors, as higher pressures mean less fluid volume is needed to generate a given force, contributing to overall system efficiency.