2CY-12 marine gear pump mechanical seal pump spares:

China 2CY-12 marine gear pump mechanical seal pump spares:

Because this type of oil pump has many USES, the sealing material (friction pair) is also different, in order to ensure the reliability of the seal
Manufacturer's recommendation is as follows:
 clean oil (excluding working condition of particulate matter) - ring friction pair chooses (sic), static ring friction pair chooses (graphite)
When there are particles and the vibration is large -- the dynamic ring friction pair is selected (alloy/silicon carbide), and the static ring friction pair is selected (alloy/silicon carbide).
Can also be customized according to customer requirements.If does not require the default as ( clean oil)