Excellent quality Air Valve Plastic - 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 have been proud from the higher consumer gratification and wide acceptance due to our persistent pursuit of high quality both on product or service and service for Flow Control Valve , Air Release Valve , Billet Crankshaft , Looking to the future, a long way to go, constantly striving to become the all staff with full enthusiasm, one hundred times the confidence and put our company built a beautiful environment, advanced products, quality first-class modern enterprise and work hard!
Excellent quality Air Valve Plastic - 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:

Excellent quality Air Valve Plastic -
 piston ring – DONGYI detail pictures

Excellent quality Air Valve Plastic -
 piston ring – DONGYI detail pictures


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With our leading technology at the same time as our spirit of innovation,mutual cooperation, benefits and development, we are going to build a prosperous future alongside one another with your esteemed enterprise for Excellent quality Air Valve Plastic - piston ring – DONGYI, The product will supply to all over the world, such as: Morocco , Portugal , Armenia , To create more creative products, maintain high-quality products and update not only our products but ourselves so as to keep us ahead of the world, and the last but most vital one: to make every client satisfied with everything we offer and to grow stronger together. To be the real winner, starts here!
  • It is not easy to find such a professional and responsible provider in today's time. Hope that we can maintain long-term cooperation.
    5 Stars By Sabrina from Afghanistan - 2018.10.31 10:02
    The company has a good reputation in this industry, and finally it tured out that choose them is a good choice.
    5 Stars By Michaelia from Kazakhstan - 2018.02.04 14:13
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