Overview
TDBET6EPS proportional relief valve controls the cracking pressure by a proportional solenoid that directly Overviewdrives the cone spool, ratio of the bearing area at both ends of the main spool (4):(5)=2:1, the main spool cylindrical surface is provided with a narrow groove matched with the throttling edge inside the main spool sleeve, and a variable damping port is formed. when the main spool is closed, the variable damping port is close. As the input current changes, the cracking pressure changes as well and is approximately proportional to the input current. This kind of proportional relief valve can be used in small flow hydraulic system, or as a pilot stage of pilot operated relief valve to limit the system pressure. It uses integrated digital proportional amplifier, which is controlled by pressure closed loop control. The input command signal can be 0-10V voltage signal or 4-20mA current signal.
Basic Structure Cutaway View
1. Valve body 2. Proportional solenoid 3. Cone seat 4. Cone spool 5. Spring 6. Proportional amplifier 7. Pressure sensor
Working Principle
The valve is composed of valve body 1, proportional solenoid 2, cone seat 3, cone spool 4, spring 5, proportional amplifier 6 and pressure sensor 7. The driven current is supplied by proportional amplifier 6 to proportional solenoid 2, and the proportional solenoid 2 generates corresponding thrust, and the compression spring 5 pushes cone spool 4 to act on the orifice of cone seat 3. If the hydraulic force acting on the cone spool 4 is greater than electromagnetic force, the cone spool 4 is pushed away from cone seat 3, and the pressure medium flows in from port P, and returns to the tank through the port T, thereby limiting the system pressure no more than hope value. The system pressure can be adjusted by setting command signal to obtain corresponding drive current. In the case of zero input, the valve opening pressure is the lowest, and the system will obtain the minimum regulated pressure. The pressure sensor will monitor the pressure at the valve inlet to form a closed-loop control, to ensure a specific port pressure under certain command signal, thereby obtaining a smaller hysteresis and stabilizing the regulated pressure.
Company Profile
Beyond standard components, Taifeng Intelligent excels in delivering customized electro-hydraulic integrated control systems tailored to your specific machinery requirements. Whether you need a complete hydraulic manifold block for a specialized press or a bespoke combination of cartridge valves and pumps for mobile equipment, our engineering team works closely with you from design to production. We leverage our deep expertise in hydraulic transmission to create solutions that optimize efficiency, reduce footprint, and enhance the overall reliability of your equipment .
