A piston guide ring, also known simply as a guide ring or piston ring guide, is a component used in reciprocating compressors to guide the piston within the cylinder and help maintain alignment during operation.

Piston rings are a crucial part of the operation of reciprocating compressors, as they create a seal between the piston and cylinder wall to prevent gas leakage and ensure optimal compression efficiency. Piston rings are placed within the piston grooves along the outer diameter of the compression piston.

Piston Guide Ring
Piston Guide Ring
Piston Guide Ring
Piston Guide Ring
Piston Guide Ring
Piston Guide Ring
Piston Guide Ring

Compressor Piston Guide Ring

DescriptionFunctions
Design features: a variety of structural designs, suitable for pistons arranged horizontally, vertically and at any angle; for oil-lubricated or non-oil-lubricated cylinders, different designs are given to achieve the best service life; different materials are for different Working conditions to achieve the best sealing efficiency; the support ring is designed in accordance with the API618 standard to ensure its load-bearing and guiding effect on the piston and prevent direct contact between the piston and the cylinder liner
Guidance: The primary function of a piston guide ring is to guide the piston as it moves up and down within the cylinder. It helps to ensure that the piston remains properly aligned, minimizing friction against the cylinder wall and reducing wear.

Reduced Friction: By providing a smooth surface against which the piston can slide, the guide ring reduces friction between the piston and the cylinder wall. This helps to improve the efficiency of the compressor by reducing energy losses due to friction.

Sealing: In some designs, piston guide rings also contribute to sealing the gap between the piston and the cylinder wall. This helps to minimize gas leakage during the compression process, improving overall compression efficiency.

Wear Resistance: Guide rings are typically made from materials that are resistant to wear and corrosion, such as bronze or other self-lubricating alloys. This ensures that the guide rings maintain their integrity and effectiveness over the lifespan of the compressor.

Overall, piston guide rings play a crucial role in ensuring the smooth and efficient operation of reciprocating compressors by guiding the piston, reducing friction, and contributing to gas sealing. Proper selection and maintenance of guide rings are important for optimizing compressor performance and reliability.


Part of the structure of the DONGYI piston ring

PTFE (filled polytetrafluoroethylene)

Hy501 bears strong load, good wear resistance, suitable for low pressure (<40bar) working conditions with oil

HY546 has high hardness and low friction coefficient, suitable for medium pressure (40-100bar) oil conditions

HY520 has good thermal conductivity and is often used in high-temperature and high-speed oil-free air compressors and oxygen compressors

HY521 oil-free, suitable for dry/wet gas media, wear-resistant

HY524 is suitable for extremely dry gas, often used in oil-free nitrogen compressors

HY526 is suitable for oil-free working conditions, light dry gas, high wear resistance, high temperature resistance

HY607 is suitable for oil-free oxygen compressor

PPS (polyphenylene sulfide)

HY607 is suitable for oil-free oxygen compressor PEEK (polyether ether ketone)

HY607 is suitable for oil-free oxygen compressors, single ring notch with pressure relief groove, full ring

Phenolic Resin

HY547 is suitable for oil-free, chrome-plated, high pressure (up to 0bar or more) and other harsh working conditions

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