100% Original Stainless Steel Flange Needle 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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100% Original Stainless Steel Flange Needle 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 Stainless Steel Flange Needle Valve -
 piston ring – DONGYI detail pictures

100% Original Stainless Steel Flange Needle Valve -
 piston ring – DONGYI detail pictures


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We not only will try our greatest to offer superb companies to just about every buyer, but also are ready to receive any suggestion offered by our shoppers for 100% Original Stainless Steel Flange Needle Valve - piston ring – DONGYI, The product will supply to all over the world, such as: USA , Netherlands , Bangladesh , With a team of experienced and knowledgeable personnel, our market covers South America, the USA, the Mid East, and North Africa. Many customers have become our friends after good cooperation with us. If you have the requirement for any of our products, please contact us now. We are looking forward to hearing from you soon.
  • The company has a good reputation in this industry, and finally it tured out that choose them is a good choice.
    5 Stars By Rebecca from Austria - 2017.08.21 14:13
    The accounts manager made a detailed introduction about the product, so that we have a comprehensive understanding of the product, and ultimately we decided to cooperate.
    5 Stars By Moira from Seychelles - 2017.12.31 14:53
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