AAK 3 tricks optimized the original Hydraulic Cartridge Counterbalance Valve, and its service life is twice that of its peers

China [CN]

Coleman is from a hydraulic equipment company in Ecuador. He has been engaged in procurement for 3 years and has been quite smooth. In the second half of this year, the hydraulic winches they have sold out for 8 months was complained by customer that they were slipping under load and were prone to shake. After checking, it was found that the hydraulic cartridge counterbalance valve in the system was abnormal. The original manufacturer of the hydraulic cartridge counterbalance valve said that under such working conditions, the hydraulic counterbalance valves would need to be replaced every 8 months. The boss was not satisfied with this short service life and asked Coleman to find a hydraulic counterbalance valve manufacturer who can guarantee a longer service life. Coleman was surprised that all other hydraulic counterbalance valve manufacturers he contacted said that the original manufacturer was correct.

Coleman saw AAK on Google and sent an email for inquiry with the attitude of trying. After communication, we learned his purchasing status. According to his hydraulic schematic diagram, working condition requirements, and hydraulic counterbalance valve drawings, AAK engineers also agreed with the opinions of the original manufacturer, but AAK has an optimization plan, and can guaranteed a service life of at least 16 months. When Coleman learned that AAK wanted to optimize the structure of the original hydraulic counterbalance valve, he hesitated and worried that it would affect the function, and his engineers may not accept it, so there was no news from him for a week. 7 days later, Coleman told us that he had no choice but to pay for the development cost by himself to request AAK samples. After 45 days, AAK sent 12 hydraulic counterbalance valve samples. 

Last week, Coleman sent an email to us that the equipment installed with AAK hydraulic cartridge counterbalance valves ran stably without any functional impact. 8 months have passed and the customer has no complaints. I told him that even in another 8 months, the customer wouldn't complain. AAK optimized the hydraulic counterbalance valve with minor changes in 3 aspects, which is not only more stable and better, but also more durable.

1. In the inner chamber of the hydraulic counterbalance valve spool, the boss for axial limit is machined. The piston slides in the second chamber. The rear end of the piston is equipped with a one-way throttling device (the first damper and the second steel ball). 

2. The main valve spring adopts multiple spring structures with different stiffness, and the chute on the cone side of the valve spool can control more accurately and sensitively to prevent the load from stalling.

3. The second steel ball is placed in the third chamber of the piston and matched with the valve port of the first damper. The rear end of the screw plug is provided with a damper, which has two damping links. The utility model reduces the system pressure, reduces vibration, is beneficial to stability, and is durable.

AAK hydraulic cartridge counterbalance valve, stable and durable, you can also try a small order!

https://www.aakindustry.com/info-detail/counterbalance-valves-aak436