192 visiting now: 155 USA USA flag 20 Belgium Belgium flag 7 UK UK flag 5 Canada Canada flag 2 Singapore Singapore flag 1 China China flag 1 Ireland Ireland flag 1 Pakistan Pakistan flag 1 Australia Australia flag 1 Saudi Arabia Saudi Arabia flag

Highlighted Companies

Under 55 ℃ Aak Hydraulic Relief Valve Still Ensure A Long Service Life - China

price: 100.00 Dollar US$

Vasiliev is a purchaser from an oil field production company in Russia.

Although he has not been in office for a long time, his purchasing is very smooth.

Early last year, he purchased a batch of hydraulic relief valves for the hydraulic system of drilling rigs for oil exploration in Alaska.

The testing on the hydraulic relief valve sample from the original supplier was smooth, but the drilling machine was unable to start after working for about 3 months.

It was judged on site that the hydraulic relief valve in the equipment was leaking.

After further disassembling the hydraulic relief valve, it was found that the O-ring in the hydraulic relief valve was worn and broken.

Vasiliev contacted the original hydraulic valve manufacturer.

The manufacturer replied that the standard nitrile rubber (NBR) O-ring used for this hydraulic relief valve has a service life of at least more than 1 year.

He asked Vasiliev to check the temperature of the working environment.

When he learned that it was extremely cold at - 50 ℃, the manufacturer said that the sealing ring of the hydraulic relief valve can only be replaced once every 3 months, and there is no other alternative sealing ring.

Vasiliev was helpless and had to replace the sealing ring of the hydraulic relief valve to maintain the start-up.

Two months after the new O-ring was installed, the hydraulic relief valve leaked again.

The engineer complained that the hydraulic relief valve purchased by Vasiliev was too unreliable.

Vasiliev has to find new suppliers.

He contacted with more than 30 hydraulic valve manufacturers, including we AAK hydraulic valve.

Nearly all manufacturers replied that under the extremely cold condition of - 50 ℃, it is normal for sealing ring to have a service life of only 2-3 months.

Only a few hydraulic valve manufacturers are willing to test new materials, but the lead time is to be determined.

After receiving the email, AAK just asked about the quantity and delivery date, and told Vasiliev that our product quality can be guaranteed for 1 year under the extremely cold condition of - 50 ℃.

Vasiliev may have realized the AAK hydraulic valve is some different, and asked about 4 why and 3 how in a short email.

We replied that there is no need to make sample for this hydraulic relief valve, because we produced a hydraulic relief valve for a North American customer that was used under similar working conditions the year before last.

It has been used for more than 1 year and there was no complaint about the leakage of the hydraulic relief valve.

Vasiliev was still rather in doubt about this, but he had no other choice except to try AAK hydraulic relief valve, because other hydraulic valve manufacturers either gave up or can not determine the lead time.

After 30 days, AAK delivered the hydraulic relief valve as scheduled.

After the test was normal, the original hydraulic relief valve was replaced.

6 months later, we asked Vasiliev whether the customer complained about the abnormal hydraulic relief valve.

Vasiliev said that AAK hydraulic relief valve was in normal use.

His boss was surprised that AAK had done something that more than 30 other hydraulic valve manufacturers could not do.

Now the new project is to be developed, and the boss requested that the hydraulic relief valve should be purchased from AAK.

AAK hydraulic relief valve uses ZnO / MAA reinforced hydrogenated nitrile rubber (HNBR) O-ring.

The high temperature resistance of this O-ring is 130 ~ 180 ℃, and the cold resistance is - 55 ~ - 38 ℃.

Compared with the ordinary nitrile butadiene rubber ring, silicon rubber, fluororubber, Polytetrachloroethylene O-ring, it has better performance on cold resistance and radiation resistance, is more suitable for extreme cold environment, and can greatly improve the service life of O-ring.

AAK hydraulic relief valve with specially treated hydrogenated nitrile rubber (HNBR) O-ring can still be used for more than 1 year even under the extremely cold condition of - 55 ℃, and this Russian client don't want to find a second hydraulic relief valve supplier any more.

AAK hydraulic relief valve has a service life of at least 1 year under extremely cold conditions of - 55 ℃.

Welcome to have a small try! AAK HYDRAULIC VALVE (147) 2022-02-08


Company Contact:


  • Phone: +8657483008115

  • Address: Bona Business Building, No. 456 Taikang Middle Road,, Yinzhou, Ningbo, China, Ningbo , Zhejiang , China

  • Email: Email


Published date: March 16, 2022

  • Business Description: Focused on the Development and Manufacturing of Hydraulic Valves since 2006, in Ningbo China

    Since its establishment 12 years ago, 6 first-line international brand importers have placed orders with AAK for 5 consecutive years, with a re-peat order rate of 62%.

    Exported to more than 20 countries, AAK Hydraulic Valves used on "AIRCRAFT" have been supplied to Russian customers.

    68%+ of the high precision hydraulic valves exported from Ningbo Port come from AAK hydraulic valves.

Related listings



  • Outsource Web Development Service India
    Outsource Web Development Service India
    Computer services - silicon valley - India - February 24, 2022 - check with company for price

    Is it really required to create a new website? SiliconValley specialises in website building and mobile app development. Creating websites has become a worldwide craze in recent years. For the past 18 years, we've been creating websites. We construct...

  • Outsource Angularjs Programming India
    Outsource Angularjs Programming India
    Computer services - silicon valley - India - February 22, 2022 - check with company for price

    Silicon Valley is a prominent AngularJS Development firm that provides AngularJS Services that take our clients from concept to finished product based on their specifications. AngularJS is a front-end web framework and javascript-based language for c...

  • Outsource Nodejs Development Web India
    Outsource Nodejs Development Web India
    Computer services - silicon valley - India - February 17, 2022 - check with company for price

    Silicon Valley provides NodeJS development services that are open-source and cross-platform, as well as runtime javascript. Thanks to our agile-based methodology, our team of skilled NodeJS engineers with Javascript competency uses the Java script li...



Safe Trade Tips

  • Ask for business references and check them
  • Use a payment method that offers better protection for all such as Letters of credit and verified professional escrow services. Avoid payments in advance such as money transfers
  • Verify their business via their local Chamber of Commerce
  • Search the internet using their website address, their business name, their phone and fax numbers, and their email addresses to see if you can find any feedback about them.
  • Get to know more about scams and fraud to avoid: Internet Crime Complaint Center - Consumer Financial Protection Bureau
  • This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"