AAK hydraulic check valve, 20% expensive, with service life twice than peer

This morning, Robert sent an email asking about the production time of 1,200
hydraulic check valves, which surprised me a little, because in the past 2
years, he normally just placed small quantity trial orders of hydraulic check
valves. Robert is a purchaser of John Finlay company in Australia. We met 2
years ago. A batch of hydraulic tamping machine equipment of their company
began to receive complaints again and again from the previous year. After
inspection, it was found that the hydraulic check valve in the equipment did
not maintain pressure. Robert contacted the original hydraulic check valve
manufacturer to find a solution. The manufacturer advised that the working
pressure and working frequency of the hydraulic tamping machine may be too
high, resulting in frequent collision between the ball valve and valve seat of
the hydraulic check valve, affecting the sealing effect. The only solution is
to replace the leaked hydraulic check valve. Although replacing the hydraulic
check valve is a heavy workload, Robert has no choice but to accept. The
trouble is that 6 months later, the same problem happened again. The customer
was very unhappy. The boss asked Robert to find a new supplier of hydraulic
check valve immediately.

Robert suggested purchasing hydraulic check valves from AAK to replace those
unqualified ones, because the durability test of AAK hydraulic check valves was
the most lasting among all of the samples from different manufacturers at the
beginning. At present, there is an equipment installed with AAK hydraulic check
valve, which has been used for 1 year but without any abnormality. The boss
thought that the price of AAK was more than 20% higher and unacceptable, and
asked Robert to look for a new manufacturer of hydraulic check valves.

In the process of continuous screening, Robert selected 5 hydraulic check valve
manufacturers to try their samples. Basically, after half a year, these
hydraulic check valve samples had similar problems one after another. Robert
was at a loss. He once again suggested to the boss to purchase AAK hydraulic
check valves. After comparing so many hydraulic check valve manufacturers, none
of their samples can be used for more than 1 year under this working condition,
but the equipment installed with AAK hydraulic check valve has been used for
nearly 2 years, and there has been no failure to maintain pressure. If the
hydraulic check valve needs to be replaced every 6 months, the after-sales cost
is too high, which has far exceeded the 20% higher cost of the hydraulic check
valves. More importantly, it brings the reputation of unstable equipment
quality to users. After listening to Robert's analysis, the boss approved AAK
as the preferred supplier of their company for hydraulic check valves.

It took Robert 2 years to persuade his boss to place a large order with AAK. He
knew that the durability of AAK hydraulic check valve was more than twice that
of other suppliers, and the after-sales cost was also low. How can AAK
hydraulic check valve be durable under high pressure and high frequency use?
According to the working condition requirements and working frequency of their
company's equipment, AAK uses silicon nitride (Si3N4) ceramic ball as the ball
valve, which has twice the hardness than steel, lower thermal expansion
coefficient than steel ball, good roundness and small friction coefficient. It
can resist the corrosion of most chemicals and can still not be worn under the
condition of high pressure and high frequency use. The vast majority of
hydraulic check valves are steel balls. Because the price of silicon nitride
(Si3N4) ceramic balls is more than several times higher than that of ordinary
steel balls, it will not be considered for cost saving. However, AAK uses
special materials for special needs in combination with working conditions and
use frequency, especially what most hydraulic check valve manufacturers are
unwilling to do, but AAK likes this challenge most.

AAK hydraulic check valves, focused on meeting customer needs. You can also
give it a try!

https://www.aakindustry.com/info-detai , l/hydraulic-check-valves-aak167

Click to Enlarge