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20619A/641103312/P25OSK
Evergrow
The Oil Seal Kit 20619A / 641103312 / P25OSK is a replacement sealing kit for the bearing section of Mission Magnum, Mission 2500 Supreme, Sandmaster, and MCM centrifugal pumps. The kit brings together three individual sealing components designed to help retain lubricant and limit the entry of contaminants around the inboard and outboard bearing covers.
For centrifugal pumps operating in oilfield drilling, mud transfer, and industrial fluid-handling applications, reliable bearing sealing is an important part of maintaining the power-end assembly. A properly selected oil seal kit can help protect the bearing area and reduce the risk of premature maintenance.
The Oil Seal Kit contains three components, there are two types of materials(steel and NBR) available for these seals.
20619A/641103312/P25OSK Oil Seal Kit | ||||
Mission No. | Mission Part No. | MCM No. | Application | Weight kg |
20619-01 | 648408300 | P25IBBOS | Oil seal, Inboard Bearing Cover | 0.06 |
20620-01 | 648408409 | P251BBES | Exclusion Seal,Inboard Bearing Cover | 0.01 |
20619-02 | 648408359 | P25OBBOS | Oil seal, O.B.BearingCover | 0.04 |
These three components are identified as the oil seal kit for the 250-series centrifugal pump power end.
The 20619-01 Oil Seal is installed at the inboard bearing cover. Its primary purpose is to help retain the lubricant within the bearing area while maintaining the required sealing condition around the rotating shaft.
A worn or damaged inboard oil seal may contribute to lubricant leakage and can allow contaminants to enter the bearing area. During pump maintenance, the seal should therefore be inspected whenever the bearing cover is removed.
The 20620-01 Exclusion Seal provides an additional barrier at the inboard bearing cover. Its function is particularly important in environments where dust, drilling fluids, moisture, or other contaminants may be present.
Working together, the inboard oil seal and exclusion seal provide complementary protection for the bearing area.
The 20619-02 Oil Seal is fitted at the outboard bearing cover. Like the inboard oil seal, it contributes to lubricant retention and helps maintain the sealing condition around the rotating assembly.
Replacing the inboard and outboard seals as a matched kit can be a practical approach during scheduled power-end maintenance.
Oil seals are wear components. Their sealing lips and contact surfaces can gradually deteriorate because of operating time, heat, contamination, shaft wear, or improper installation.
Replacing only one damaged seal may leave other aged sealing components in service. For this reason, the 20619A/641103312 / P25OSK kit provides a convenient replacement solution by supplying the three associated seals together.
During an overhaul, maintenance personnel should also inspect the shaft 20612-02-33|646490557|P25SHFT, bearing inboard covers 20626|P25IBBC, bearing housing 20624-01-01|P25OBBH, inboard bearings 20615-1|P25IBBRG, and other mating surfaces. A new seal cannot compensate for excessive shaft wear or damage to the sealing surface.
The 20619A / P25OSK Oil Seal Kit is applicable to centrifugal pump applications including:
Mission Magnum centrifugal pumps
Mission 2500 Supreme
Mission Sandmaster
MCM 250 Series centrifugal pumps
Equivalent 250-series pump configurations where the corresponding part numbers are specified
Parts references identify P25OSK / 20619A as the 250 Oil Seal Kit and list the three individual components separately.
Linhai Evergrow supplies centrifugal pump replacement parts for demanding oilfield and industrial applications. The Oil Seal Kit 20619A / P25OSK is available as a convenient solution for maintenance teams looking to replace the inboard and outboard bearing sealing components together.
When requesting a quotation, customers can provide 20619A, 641103312, P25OSK, or the individual component numbers 20619-01, 20620-01, and 20619-02 for accurate part identification.
For inquiries:
Linhai Evergrow Petroleum Equipment Co., Ltd.
Email:sales@linhaievergrow.com
Tel./WhatsApp: +86 18991929885
All manufacturer names, trademarks, and part numbers are used for identification and reference purposes only. Evergrow is not an OEM authorized reseller of these parts.
