Maintenance of retarder of vertical centrifuge

Vertical Centrifuge uses centrifugal force to dry drilled solids in oil or synthetic base fluids. A stainless steel screen bowl traps “wet” solids and accelerates them up 900 RPM. Liquid is forced through the screen bowl openings, while “dry” solids are extracted by the angled flights attached to the cone, which rotate slightly slower than the bowl. Tungsten carbide protects the flights from abrasive solids and ensures long operational life. This aids in maintaining a constant gap between the scroll and screen bowl, which is crucial for proper operation. KOSUN Vertical Centrifuge has been done with strict balance testing for all major rotary components to minimize vibration & noisy.

Maintenance of retarder of vertical centrifuge:
1. For the first time, replace the oil after one-cycle operation. And replace it every 3-6 months later on. If the temperature goes too high or too humid, remember to shorten the period and to add oil.
2. Retarder is not lubricated when leaving the factory, so users should add enough lubricating oil until it reaches the designated height by oil standard.
3. When impact load is too much or startup too frequent, users should accesorize positioning pin or hydraulic coupling between base and footing, or demand a positioning slot or positioning plane upon the base.
4. Users should make it clear when placing the order if retarder output shaft should be installed upwards and negotiate over designing lubricating system.
5. Horizontal and lateral retarder should be installed about 15° inclined.
6. Vertical and luffing retarders adopt pump reciprocating lubrication. When input power is
7. It is regulated that retarder should use N220 industrial gear oil(horizontal one uses N150 gear oil), lubricating oil should comply with.
8. After installation, the input shaft of retarder should be rotated flexibly by hand and output shaft rotated by 360°, the resistance felt everywhere should be the same, and lubricating oil should be added to the designated height by oil standard. Then, connect the power to allow it run without load for 1-2 hours and increase load bit by bit if everything is alright.


Established in 1992, Xi’an KOSUN Machinery Manufacturing Co., Ltd. is a modernized producing enterprise integrating R & D, production and sales. It always pursues the tenet of “Human Oriented, Technology First, Customers Foremost”, stands still in China market with responsible and sustainably innovative spirits, provides one-stop, all-round specialized separation equipment and designing, manufacturing and system integration of drilling fluids solids control equipment as well as the best products and services to the customers.