1. Basic Introduction
• Type: The CABG LHN is a balanced valve and belongs to the category of cartridge valves.
• Function: It is primarily used to control overrunning loads, allowing unrestricted one-way flow of hydraulic fluid from the directional valve (Port 2) to the load port (Port 1), while regulating flow from Port 1 to Port 2 through a direct-acting, pilot-assisted relief valve function.
• Alternative Names: Also known as a motion control valve or over-center valve.
2. Technical Characteristics
• Pilot Ratio: The CABG LHN balanced valve has a pilot ratio of 3:1, meaning the pilot assistance at Port 3 reduces the effective setting of the relief function by the pilot ratio factor.
• Flow Rate: The flow rate varies depending on the specific model and application. For example, the CBDA-LHN model has a flow rate of 30 L/min.
• Pressure Setting: The valve's setting should be at least 1.3 times the load pressure value. Under standard settings, the valve's reset pressure is 85% higher than its cracking pressure.
• Adjustment Method: Turning the adjustment clockwise reduces the setting value, lowering the pressure. Under full relief conditions, the setting is below 200 psi (14 bar).
• Sealing Performance: The valve is fully sealed between all ports, ensuring system stability and safety.
3. Application Scenarios
• Construction Machinery: The CABG LHN balanced valve is widely used in hydraulic systems of excavators, loaders, cranes, and other construction machinery to control load movement and stability.
• Other Industries: It can also be applied in other industrial fields requiring precise control of hydraulic flow.
4. Model Selection & Configuration Options
• Model Selection: Choose the appropriate model based on specific application requirements and scenarios. For example, select models with different flow rates according to flow demands.
• Configuration Options: The CABG LHN balanced valve may offer different check valve cracking pressure options to meet diverse application needs. For instance, a 4 psi (0.3 bar) check valve cracking pressure can be selected to prevent actuator cavitation.
5. Installation & Maintenance
• Installation Method: The CABG LHN balanced valve can be installed into mounting holes within the actuator, becoming an integral part of the actuator for enhanced circuit safety.
• Maintenance:
• Regularly inspect and replace wear-prone components such as seals to ensure the valve's sealing performance and proper operation.
• Periodically clean the valve interior based on usage conditions to prevent blockage caused by contaminants, which could affect performance.