Factory Directly supply Control Valve - rider ring – DONGYI Detail:
Selection from a comprehensive range of tribological materials
No pressure applied to the rider ring by relief grooves
Conversion of cylinder from lubricated to non-lubricated operation
In reciprocating compressors, rider rings guide the piston in the cylinder bore.
We manufacture them from materials that are specifically developed for the respective application.
Product detail pictures:

Related Product Guide:
Duct Cleaner Air Valve Options
What Is an Air Release Valve?
We are proud of the superior customer gratification and wide acceptance due to our persistent pursuit of top of the range both of those on merchandise and service for Factory Directly supply Control Valve - rider ring – DONGYI, The product will supply to all over the world, such as: Rwanda , India , Munich , We are in continuous service to our growing local and international clients. We aim to be worldwide leader in this industry and with this mind; it is our great pleasure to serve and bringing the highest satisfaction rates among the growing market.

The factory technical staff not only have high level of technology, their English level is also very good, this is a great help to technology communication.
