100% Original Air Lock Valve - piston ring – DONGYI

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Tribologically advantageous materials Gas-tight construction for low-molecular-weight gases piston rings seal the gas in the compression chamber of reciprocating compressors. They are customized, in terms of design and material, to the respective application conditions in refineries, the natural gas industry, as well as the petrochemical and chemical industries. The precisely manufactured rings also allow reliable operation with a long service life in industrial air production and many areas...


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We also offer product sourcing and flight consolidation services. We have our own factory and sourcing office. We can provide you with almost every type of product related to our product range for Machine Engine Piston Ring , Relief Valve , Constant Force Spring , Living by quality, development by credit is our eternal pursuit, We firmly believe that after your visit we will become long-term partners.
100% Original Air Lock Valve - piston ring – DONGYI Detail:

Tribologically advantageous materials
Gas-tight construction for low-molecular-weight gases

piston rings seal the gas in the compression chamber of reciprocating compressors. They are customized, in terms of design and material, to the respective application conditions in refineries, the natural gas industry, as well as the petrochemical and chemical industries. The precisely manufactured rings also allow reliable operation with a long service life in industrial air production and many areas of process engineering.

Piston rings, rider rings and bands are manufactured in various designs:

One-piece or segmental straight
Angle cut
Step cut
Twin Ring™
Double Twin Ring™
Two Segment
Pressure balanced
designs rings and has developed specific combinations for particularly problematic and demanding applications. This has also included numerous successful conversions from lubricated to non-lubricated operation.Pressure balanced rings are available, when deemed appropriate for high pressure applications and piston/rider ring combinations are also available for more specific applications.

Large diameter piston rings up to 47” (1200mm) are custom manufactured for special requirements. A range of metallic piston and rider rings are also manufactured, using selected grades of bronze or cast iron, where operational requirements dictate.


Product detail pictures:

100% Original Air Lock Valve -
 piston ring – DONGYI detail pictures

100% Original Air Lock Valve -
 piston ring – DONGYI detail pictures


Related Product Guide:
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What’s A 4/2 Compressed Air Valve?

We rely upon strategic thinking, constant modernisation in all segments, technological advances and of course upon our employees that directly participate in our success for 100% Original Air Lock Valve - piston ring – DONGYI, The product will supply to all over the world, such as: Argentina , Birmingham , Luxembourg , To let customers be more confident in us and get the most comfortable service, we run our company with honesty, sincerity and best quality . We firmly believe that it is our pleasure to help customers to run their business more successfully, and that our experienced advice and service can lead to more suitable choice for the customers.
  • Cooperate with you every time is very successful, very happy. Hope that we can have more cooperation!
    5 Stars By Ricardo from Lithuania - 2018.03.03 13:09
    Sales manager is very enthusiastic and professional, gave us a great concessions and product quality is very good,thank you very much!
    5 Stars By Marina from Rotterdam - 2018.09.16 11:31
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