Dante is from a hydraulic manufacturing company in Greece. In the first half of last year, they wanted to upgrade the lifting stability of the company's original elevator. The function of the hydraulic cartridge counterbalance valve is the key. Dante made samples from a local hydraulic cartridge valve manufacturer that has been cooperating for 5 years. The stability has not reached the assumption of upgrading. After 2 times of improvements, the effect is still not obvious. Dante contacted more than 10 hydraulic cartridge valve manufacturers, but failed after a week. The boss urged the progress many times, and Dante was worried.
Dante found AAK on Google, noticed that AAK had some customer cases about hydraulic cartridge counterbalance valves, and sent an email asking: Can AAK hydraulic cartridge counterbalance valve achieve fast start and stable positioning? After communication, we learned that they wanted to upgrade the equipment, and the key selling points of the equipment is to be started quickly and positioned steadily. According to the hydraulic system schematic diagram and the original hydraulic cartridge counterbalance valve drawing provided by Dante, after discussion, AAK engineers confirmed that the original hydraulic cartridge counterbalance valve can be optimized to achieve fast start and stable positioning. After 45 days, AAK sent 10 samples of hydraulic cartridge counterbalance valves.
2 months later, Dante sent an email saying that their engineers were satisfied with the function of AAK hydraulic cartridge counterbalance valve, which realized their lift selling points. Their sales team was confident to do a good job in market promotion and achieve the hot sale of equipment. AAK hydraulic cartridge counterbalance valve can solve the contradiction between response speed and stability, and has no back pressure effect. On the basis of the original, it has made 3 unique optimizations:
1. A fixed damping is installed between the inlet of the hydraulic cartridge counterbalance valve and the pilot oil port. The oil inlet of the valve body is 2 connecting ports of the oil circuit, and is equipped with a pressure gauge interface.
2. The valve spool of the hydraulic cartridge counterbalance valve slides in the upper and middle part of the valve body. The middle section of the valve spool has an inner concave ring, which is the inlet of the hydraulic cartridge counterbalance valve. The right end of the inner concave ring of the valve spool is processed into a conical surface. The conical surface is equipped with a two-stage stepped taper ring. The cumulative area of the conical surface is the same as the area of the cylinder end face at the right end of the valve spool. The stepped taper is adopted to realize the smooth flow change and smooth movement of the hydraulic cartridge counterbalance valve.
3. The cylindrical outer circle at the right end of the valve spool of the hydraulic cartridge counterbalance valve slides with the middle hole of the valve body. The adjusting screw is installed at the top pressure of the rear end of the balance adjusting spring. The adjusting screw is matched with the rear end of the valve body and controls the telescopic operation of the balance adjusting spring.
The optimized hydraulic cartridge counterbalance valve adopts the hydraulic control automatic closing valve to realize the unity of quickness and stability of the hydraulic cartridge counterbalance valve. At the same time, the pressure compensation is used to make the safety overflow function of the hydraulic cartridge counterbalance valve not affected by the back pressure. It can be applied to the hydraulic system with closed center and open center.
AAK hydraulic cartridge counterbalance valve, fast start, stable positioning, you can also try it!
AAK HYDRAULIC CARTRIDGE VALVES (474) 2023-01-17
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