$288.40
This is the Pfeiffer Part# PSK027 Seal Kit for the DUO 250A vacuum pump. This comprehensive kit includes O-rings, shaft seals, gaskets, and valve seats. Designed specifically for the DUO 250A, this kit provides everything you need to restore the sealing integrity of your pump during routine maintenance.
Seal Kit, Pfeiffer DUO 250A
Seal Kit, Pfeiffer DUO 250A
The DUO 250A is a large, powerful two-stage rotary vane pump. It is built for tough industrial jobs. This pump holds about 23 liters of oil. That tells you how big it is. It is used in many demanding applications where a strong, reliable vacuum is needed.
This kit includes every rubber seal your pump needs. Here is the complete list of what you get:
| Part Number | Description | Quantity |
|---|---|---|
| 4070166 | O-ring, 10 x 2.5 mm – Viton | 1 |
| 4070259 | O-ring, 15 x 2.5 mm – Viton | 2 |
| 320177 | O-ring, 18 x 2.0 mm – Viton | 1 |
| 4070333 | O-ring, 19 x 2.5 mm – Viton | 1 |
| 4070420 | O-ring, 24 x 2.5 mm – Viton | 4 |
| 320524 | O-ring, 32 x 2.5 mm – Viton | 1 |
| 02124025 | O-ring, 28 x 5 mm – Viton | 1 |
| 4070621 | O-ring, 38 x 3.0 mm – Viton | 2 |
| 320535 | O-ring, 500 x 3 mm – Viton | 1 |
| 320534 | O-ring, 180 x 5 mm – Viton | 1 |
| 48656700 | O-ring, 140 x 5 mm – Viton | 1 |
| PL23970419 | O-ring, 125 x 5 mm – Viton | 3 |
| 320533 | O-ring, 47 x 2.5 mm – Viton | 1 |
| 02106062 | O-ring, 107.32 x 5.33 mm – Viton | 4 |
| PL23970129 | O-ring, 65 x 5 mm – Viton | 2 |
| PL23970149 | O-ring, 8 x 2 mm – Viton | 1 |
| 320538 | O-ring, 85 x 5 mm – Viton | 1 |
| 4070088 | O-ring, 6 x 2.2 mm – Viton | 2 |
| 300167 | Sight Glass Gasket | 2 |
| 300214 | Ring Gasket | 2 |
| 310152 | Single Lip Shaft Seal | 2 |
| 390028 | Valve Seat | 2 |
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10 in stock
10 in stock
10 in stock
10 in stock
This Viton O-Ring (Part #23970129) is a versatile sealing component for many vacuum pumps. It measures 65 mm (inner diameter) x 5 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong. This O-ring is compatible with Pfeiffer, Busch, and Leybold pump brands. It is used in many models including the Pfeiffer DUO 120A, DUO 125, DUO 250A, DUO 255M, and UNO 250A. If you are rebuilding your pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kits for the DUO 120A (PSK024) and DUO 125 (PSK025)
10 in stock
This Case Gasket (Part #300215) is made from high-quality cork. It sits between the main body parts of your Pfeiffer vacuum pump. Its job is simple but very important: it creates a tight seal. This seal stops air from leaking out and keeps dirt from getting in. A good gasket means your pump holds strong vacuum pressure. This specific gasket fits the Pfeiffer UNO 250A and DUO 250A models. If you notice oil sweating or leaking from the middle of your pump, this gasket may need to be replaced.
10 in stock
10 in stock
10 in stock
10 in stock
This Viton O-ring (Part# PL23970129) measures 65 mm inside diameter with a 5 mm cross-section. Made from Viton (FKM) , it offers excellent resistance to high heat, chemicals, oils, and fuels. It is commonly used in repair kits for Busch, Leybold, and Pfeiffer vacuum pumps and is ideal for creating tight, reliable seals in harsh environments .
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