185 visiting now: 159 USA USA flag 13 Belgium Belgium flag 6 Canada Canada flag 4 Singapore Singapore flag 2 Brazil Brazil flag 1 Finland Finland flag 1 Germany Germany flag 1 Ireland Ireland flag 1 Tunisia Tunisia flag

Highlighted Companies

  • YESN-China shipping Labels manufacturer-compatible label factory (China): XIAMEN YESN-China shipping Labels manufacturer-compatible... http://www.yesnlabels.com
  • Eagle Eyes China Inspection Company (China): Eagle Eyes (CHINA) Quality Inspection Co.,Ltd. is a professional Third... https://www.china-qualityinspection.com
  • Hydraulic Pilot Operated Relief Valves Angle Error Of 0 06° - China

    price: 90.00 Dollar US$

    For the hydraulic relief valves with an angle error of 0.06 °, AAK innovated the processing of inner cone 3 years ago Fischer comes from a Spanish hydraulic equipment manufacturing company and is an experienced purchaser.

    Unexpectedly, the hydraulic pilot operated relief valves purchased last year made him depressed for more than 1 month.

    In August last year, the sales of one of their hydraulic power units was not satisfactory, and there were several complaints about unstable supply and pressure.

    The problem is that the angle error of the inner cone of the hydraulic pilot operated relief valve is large.

    The original manufacturer of the hydraulic pilot operated relief valves advised that this is an individual problem.

    But after replacement with new one, there are more and more complaints.

    The boss was very angry and requested Fischer to purchase a new batch of hydraulic pilot operated relief valves for replacement within 45 days.

    Fischer contacted with many hydraulic cartridge valve manufacturers and required that the angle error range of the cone inside the sleeve of the hydraulic pilot operated relief valves must be 100% controlled within ± 0.08 °.

    However, 1 week has passed and no one of these hydraulic valve manufacturers is willing to accept the order.

    Fischer was depressed and worried.

    Introduced by his friend Trinidad, an old customer of AAK, Fischer sent me an e-mail.

    According to his drawings of hydraulic pilot operated relief valve, as long as the angle error of the conical surface in the valve sleeve is solved, the unstable pressure supply of the hydraulic power unit can be solved.

    1 month later, AAK sent 100 hydraulic pilot operated relief valves.

    Last week, Fischer informed by email that since AAK hydraulic pilot operated relief valves were used, there was no complaint about unstable pressure supply.

    Their engineers specially tested the internal cone angle of the hydraulic relief valves, which was 25% higher than their accuracy requirements and 100% controlled within 0.06°.

    Fischer was curious that the internal cone angle error of 0.06° could not be solved by many hydraulic valve manufacturers, but AAK exceeded the standard for 25%.

    As early as 3 years ago, AAK engineers innovated the precision machining of valve body.

    First, they established a manufacturing error model to control the error range of the angle of the inner cone below 0.06° and the maximum axial grinding tolerance of the corresponding sealing circle below 2μm.

    At the same time, a special detection device is innovated to improve the detection accuracy through error correction and ensure the stability of grinding manufacturing accuracy.

    The inner conical surface of the hydraulic pilot operated relief valve sleeve adopts the finishing process of carbonitriding and post grinding to accurately control the grinding amount.

    The key is to control the grinding amount.

    If the grinding amount of the inner cone surface is too large, it will result in the reduction of hardness, and the service life of the hydraulic pilot operated relief valve will be reduced, which leads to unstable pressure supply.

    AAK hydraulic pilot operated relief valves, strictly control the details, high accuracy, you can also try a small order! AAK HYDRAULIC CARTRIDGE VALVES (316) 2022-08-12


    Company Contact:


    • Phone: 86-574-83008115

    • Address: Bona Building, No. 456 Taikang Middle Road, Yinzhou, Ningbo, China, NINGBO , ZHEJIANG , China

    • Email: Email


    Published date: September 9, 2022

    • Business Description: Hydraulic valve manufacturer, focused on the Development and Manufacturing of Hydraulic Cartridge 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.

      Our Products:

      - Hydraulic Relief Valves Dust Free Packaged For Food Equipment

      - Hydraulic Needle Valves 450bar Over 1 Year Service Life

      - Hydraulic Pilot Operated Relief Valves Benchmarked With German Hawe

      - With Temperature And Gain From Aak Hydraulic Valves

      - Hydraulic Valve Blocks Free Of Oil Leakage

    Related listings



    • Hydraulic Pilot Operated Relief Valves Withstand 500℃ High Temperature
      Hydraulic Pilot Operated Relief Valves Withstand 500℃ High Temperature
      Valves - AAK INDUSTRY CO.,LTD. - China - September 7, 2022 - 100.00 Dollar US$

      Original factory can’t solve failure of the pressure spring of hydraulic relief valves under high temperature. AAK can withstand 500℃ Maverick is from a Canadian hydraulic equipment manufacturing company. In the first half of last year, the high-temp...

    • Hydraulic Pressure Reducing Valves Unique Design Skills
      Hydraulic Pressure Reducing Valves Unique Design Skills
      Valves - AAK INDUSTRY CO.,LTD. - China - September 7, 2022 - 100.00 Dollar US$

      The potential safety hazard of the hydraulic column can not be found, AAK newly designed hydraulic pressure reducing valves solved it with O-ring At the beginning of this year, Liam from the Netherlands found AAK Hydraulic Valves on Google. He told m...

    • Cast Steel Ball Valves1
      Cast Steel Ball Valves1
      Valves - Zhejiang Shunlin Valve Co., Ltd. - China - September 5, 2022 - contact company for price

      Ball valves Cast steel, Floating ball, Two-piece body, Split body, Sidy entry Features: Name:Ball valves Size:1/2"-8" press ure:Class 150LB-1500LB •Design and manufacture: API 608, BS 5351, API 6D, MSS-SP-72 •Face to face dimension: ASME B16.10, API ...



    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"