Welcome to www.aakindustry.com

The hardness of all parts in the hydraulic check valve reaches above HRC65, Stephen ordered from AAK Convincingly

Views : 146
Update time : 2022-02-13 12:38:05

In the Spring Festival, I received a confirmed price for a large quantity of hydraulic check valves from Stephen. The contact between Stephen and I is only 2-3 times in the whole last year. It was noted at the end of the email that he needs me to contact him as soon as possible to discuss this hydraulic check valve. Stephen comes from American CASE company. We met the year before last. After communication, it was learned that at the beginning of last year, a bulldozer of their company needed to use hydraulic check valve, the one that AAK had made samples at the beginning. Because the price of AAK hydraulic check valve was 20% higher than that of his original supplier, Stephen did not choose to purchase hydraulic check valve from AAK. Some time ago, the customer complained that the hydraulic pump was damaged due to the sudden increase of hydraulic system pressure.

 

Stephen communicated with the original hydraulic check valve manufacturer and the manufacturer replaced the hydraulic check valve with a new one, but 3 months later, the same problem came again. The customer was very dissatisfied that this delayed the construction and needed the problem solved at one time. Stephen went back to AAK and asked about the price of the hydraulic check valve. He needed us to maintain the quotation offered last year. I asked Stephen why he went back to AAK to purchase the hydraulic check valve. He told that since the first complaint from the customer, their engineers retested the original hydraulic check valve samples. The hardness of AAK sample was the highest, and the material hardness of each part of the hydraulic check valve was no less than HRC65.

 

I know why their hydraulic check valve went on strike in 3 months. When we made the sample, we knew that the working pressure was more than 450bar, which was a challenge for the hydraulic check valve. The material hardness of each part of the hydraulic check valve is required to reach more than HRC65. There may be no more than 5 hydraulic valve manufacturers that can reach this level in Ningbo.

 

Stephen wondered why the material hardness of each part of AAK hydraulic check valve can be over HRC65?

 

1. Material selection is the core. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany for this hydraulic check valve.

 

2. Heat treatment is the key. Through secondary quenching + cryogenic treatment + low-temperature tempering process, it is cooled to 650 ~ 700 and put into the furnace. After cooling to 450 ~ 500 , it is discharged from the furnace. The micro hardness is 237 ~ 247 HV.

 

3. In the later stage, point-to-point testing is the key. SonoDur3, a Rockwell hardness tester imported from Germany, adopts the UCI hardness test method, and the test program is fast and mobile to carry out nondestructive testing on the hardness of each component of the hydraulic check valve efficiently and accurately.

 

Stephen may understand that AAK has extreme pursuit for the hardness of hydraulic check valve to meet the working pressure above 450bar. Two days later, after the order of the hydraulic check valve was confirmed, he said that the complaint about the hydraulic check valve that had plagued him for half a year was finally solved at one time. We told him that he only needs to wait patiently for the delivery in 40 days, and the rest will be left to AAK.

 

AAK hydraulic check valve is exquisite in every detail. Welcome to give it a try!

 

AAK HYDRAULIC VALVE (152) 2022-02-13

 

Related News
Read More >>
Dual Function AAK Hydraulic Cartridge Relief Valve, helped Heller Save Cost by 6% Dual Function AAK Hydraulic Cartridge Relief Valve, helped Heller Save Cost by 6%
Nov .28.2022
AAK used 3 methods to directly replace a cartridge check valve and a relief valve in the hydraulic system with one hydraulic cartridge relief valve, which not only facilitated installation,
AAK Hydraulic Valve Never Use Promotional Letter and Stick to 5A for Market Promotion AAK Hydraulic Valve Never Use Promotional Letter and Stick to 5A for Market Promotion
Nov .27.2022
Last weekend, my friend, a colleague of hydraulic valves asked for advice on the promotional letter template. He also wanted to expand the international market of hydraulic valves.
For the Hydraulic Cartridge Proportional Valve with Small Pressure Loss and Accurate Control, AAK has no competitor For the Hydraulic Cartridge Proportional Valve with Small Pressure Loss and Accurate Control, AAK has no competitor
Nov .26.2022
Brandon is from a hydraulic equipment manufacturing company in Colombia. In the early stage, they developed a forging hydraulic press.
Hydraulic Cartridge Pressure Valves with 3 High Accuracy requirements, AAK solved it in 3 Steps Hydraulic Cartridge Pressure Valves with 3 High Accuracy requirements, AAK solved it in 3 Steps
Nov .25.2022
For a hydraulic cartridge pressure control valve with 3 high accuracy requirements, Jack spent 2 months on 3 cartridge valve manufacturers but the samples from all 3 factories failed.