AAK INDUSTRY CO., LTD

With a pressure resistance of 450 bar and a life of 2 million cycles, the AAK hydraulic check valve replaces the German HAWE
At 5:10 a.m. this morning, I was listening to music while browsing my emails. Billy, who has not heard from 9 months, sent an email, and without reading the content of the email, he can guess that the hydraulic check valve developed by AAK for more than three months last year has a result. Click on Billy's mail, a one-time order of 5,000 hydraulic check valves, about 500 hydraulic check valves per month. Billy's hydraulic equipment company in the United States has purchased a number of small quantities of hydraulic check valves that are resistant to high pressure from AAK. At the beginning of last year, Billy received complaints from customers that their company's high-power bulldozers were prone to weak hydraulic system start-up in less than half a year. After-sales engineers found that the hydraulic check valve leaked and did not hold the pressure.

Billy contacted the original hydraulic check valve manufacturer, the other party feedback high-power bulldozer system pressure of more than 450 bar, and the opening and closing frequency is also high, the hydraulic check valve in the high pressure state of more than 450 bar, the valve core wears fast, can only guarantee the life of 1 million times, so it is normal to replace the hydraulic check valve once every six months. If you want to find a hydraulic check valve with a life of 2 million times, you can only purchase it from HAWE in Germany. Billy has no choice, can only use the original manufacturer's hydraulic check valve to make up, but the semi-annual after-sales cost is indeed unbearable, perhaps other manufacturers can have more than 1 million times of hydraulic check valve. Billy began contacting several factories, including AAK.

After AAK received billy's email, our engineers had already concluded based on the hydraulic check valve drawings and bulldozer operating parameters that in order to exceed 2 million life span hydraulic check valves, new high-pressure resistant materials could only be tested. We replied to Billy at the time that according to AAK's existing steel options, your original manufacturer was right and could only guarantee a hydraulic check valve with a life of 1 million times. But we are confident that we have developed 2 million times, because we have our own research and development experience in anti-high pressure.

Billy replied directly, giving AAK 3 months to sample hydraulic check valves with a pressure resistance of more than 450 bar, and frankly informed that there are 2 other hydraulic check valve manufacturers that are also testing samples. If all the specimens failed, they could only buy high-pressure-resistant hydraulic check valves from HAWE in Germany. Three months later, AAK successfully sent 20 hydraulic check valve samples to Billy. Nine months later, there is no mail from Billy until today. Billy emailed the sample results, and the bulldozer with the AAK hydraulic check valve remained error-free after 9 months. The other 2 hydraulic check valves were eliminated in the 6th and 8th months.

AAK's hydraulic check valves are more than 450 bar pressure resistant and have a service life of more than 2 million cycles.

4. AAK has 11 years of experience in high-pressure resistance at HAWE's Shanghai plant in Germany.
5. We have tested more than 20 kinds of steel and selected the most suitable 35CrMo steel to produce the spool of this hydraulic check valve.
6. Good materials also need good processing, AAK for 35CrMo alloy steel used heat treatment, 845 °C annealing, 860 °C quenching (oil quenching), 200 °C low temperature tempering process, this special heat treatment, its hardness and wear resistance increased by at least 50%.

AAK hydraulic check valve, pressure resistance of more than 450 bar, you can also try a small order!