Sotras DA P158, direct aftermarket replacement. This aftermarket Separator, SPM part number SPM-SEP-1045, is a direct replacement for oil mist separators used in Busch R5, RA, and RC series vacuum pumps. With a total height of 220 mm and an outer diameter of 72 mm, it is designed to efficiently separate oil from exhaust air, ensuring clean operation and reducing oil carryover. Built to the original dimensions and ratings, it offers a cost-effective alternative without compromising performance.
Technical properties & cross references
Specifications
| Body Height |
211 mm (8 5/16") |
| Height-1 |
9 mm (11/32") |
| Total Height |
220 mm (8 21/32") |
| Product Net Weight |
0.27 kg (0.6 lbs) |
| Largest Inner Diameter |
35 mm (1 3/8") |
| Outer Diameter |
72 mm (2 27/32") |
| Stat. HS-Code |
84149000 |
| Country of Manufacture |
China |
Price beat guarantee
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller |
Price |
Checked |
| Oxfil |
USD 35.87 |
16 Oct 2026 |
| Spare Part Mart |
USD 28.70 |
Today |
Our price of USD 28.70 is approximately 20% less than this seller.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Use cases & applications
Continuous-Duty Industrial Vacuum Systems
In facilities where Busch R5 / RA / RC pumps run continuously, this separator maintains oil-air separation efficiency, reducing the frequency of oil top-ups and minimizing downtime for maintenance.
High-Dust or Particulate Environments
When vacuum pumps operate in dusty settings, the separator prevents oil mist from escaping into the atmosphere, keeping the work area cleaner and protecting downstream equipment from oil contamination.
Inventory Consolidation for Multi-Pump Sites
For sites with multiple Busch models including R5 0025 C/E, 0040 C/E, and 0055 C/E, this single separator part simplifies stock management, as it fits all these variants.
Preventive Maintenance Scheduling
Replacing the separator during scheduled service intervals helps maintain pump vacuum levels and extends pump life, avoiding unexpected failures in production-critical applications.
Frequently asked questions
How do I confirm this separator fits my Busch pump?
Check your pump model against our verified list: R5 / RA / RC 0025 C, 0025 E, 0040 C, 0040 E, 0055 C, and 0055 E. If your model is not listed, please contact our support team with your pump's serial number.
What is the filtration rating of this separator?
This separator is an oil mist eliminator designed to capture oil aerosols from the exhaust air. Specific micron rating is not provided, but it effectively reduces oil carryover in Busch pumps.
What are the key dimensions and how do they affect fit?
The separator has a total height of 220 mm, outer diameter of 72 mm, and largest inner diameter of 35 mm. Ensure your pump's separator housing accommodates these dimensions.
Is this aftermarket separator as reliable as the branded one?
We build this separator to match the original dimensions and ratings using quality materials. It is a direct replacement for Busch, Oxfil, and Sotras parts, offering reliable performance at a lower price.
How do I install this separator?
Installation is straightforward: remove the old separator, clean the housing, and insert the new one. Ensure it is seated properly. No special tools are required.