Francis is from a hydraulic equipment company in Spain, and has been purchasing smoothly for 5 years. Some time ago, he was stumped by a hydraulic cartridge proportional relief valve. The hydraulic cartridge proportional relief valve used in their customized hydraulic power unit was made by a local cartridge valve manufacturer. The equipment commissioning was not smooth, and the hydraulic cartridge proportional relief valve responded slowly and leaked when the system was in a large flow state. The original manufacturer tested the accuracy of the hydraulic cartridge proportional relief valve, and all of them reached the standard. The engineer asked the original manufacturer to optimize the structure of the hydraulic cartridge proportional relief valve, but no result after 1 week. Francis contacted several other hydraulic cartridge proportional relief valve manufacturers, but there was still no solution. Francis was worried.
Francis noticed AAK hydraulic valve in B2B and left us a message:
1. The hydraulic cartridge proportional relief valve responds slowly, and there is a source of leakage?
2. Can AAK optimize the structure of the hydraulic cartridge proportional relief valve?
3. What is the cost and lead time of customized hydraulic cartridge proportional relief valve?
After communication, we learned the situation that Francis purchased the hydraulic cartridge proportional relief valves. According to the drawings of the original hydraulic cartridge proportional relief valve, the samples of the original manufacturer, and the requirements of equipment working conditions, AAK engineers judged that the problem was probably caused by structural hazards, and AAK was 90% sure to optimize the original structure. Francis asked for AAK samples. After 45 days, AAK sent 12 samples of hydraulic cartridge proportional relief valves.
1 month later, Francis informed us by email that with AAK hydraulic cartridge proportional relief valve, the trial run of the equipment was smooth, and the customer was satisfied and planned to place a large order. Francis asked us to wait for the good news. AAK hydraulic cartridge proportional relief valve can realize large flow rate, fast response speed and no leakage. For these 3 advantages, we have made 3 optimizations on the structure:
1. The valve body of the hydraulic cartridge proportional relief valve is provided with a stepped inner hole. The side wall is provided with a stepped port. The valve cage is connected to the lower part of the valve body. On the side wall of the lower part of the valve cage, there is a flow passage cavity between the valve body and the valve body. The upper part and the inner hole of the valve body form an oil return cavity and a flow passage hole.
2. One end of the valve spool of the hydraulic cartridge proportional relief valve is slidably arranged in the inner hole of the valve cage, which can control the on-off of the through flow hole. In the oil return chamber, the lower part of the spring is against the upper part of the valve spool, and the upper part forms a control chamber with the valve body. The force on the valve spool can be changed according to the pressure of the control chamber.
3. The valve body of the hydraulic cartridge proportional relief valve is also equipped with an electric proportional control system. Its oil inlet is connected to the flow passage chamber, and its oil outlet is connected to the oil return chamber. The pressure of the control chamber is changed by changing the voltage control signal of the electric proportional control system.
The optimized hydraulic cartridge proportional relief valve uses a small flow electric proportional control system to change the pressure of the control chamber, set the pressure of the spring assembly, realize the large diameter setting of the valve port, increase the flow capacity, and have a fast response speed. The valve is line sealed and has no leakage.
AAK hydraulic cartridge proportional relief valve, has 3 advantages, with large flow, fast response and no leakage, you can also try one small order!
AAK HYDRAULIC CARTRIDGE VALVES (446) 2022-12-20
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