$8.33
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)
O-Ring,Viton,65 X 5 MM Part# 23970129
O-Ring,Viton,65 X 5 MM Part# 23970129
This is a Viton O-ring. Its part number is 23970129. An O-ring is a simple loop of elastic material. Its shape is a perfect circle. When you look at a cross-section, it looks like the letter “O”. That is where the name comes from.
You place this O-ring into a groove between two metal parts. When you tighten the parts together, the O-ring gets squished. It fills the tiny gap completely. This creates an airtight, leak-proof seal. This O-ring measures 65 mm on the inside and has a thickness of 5 mm .
This is a very versatile O-ring. It works with multiple brands and many pump models. Here are the compatible pumps :
Pfeiffer Pumps:
DUO 2.5, DUO 2.5C
DUO 5, DUO 5C
DUO 6, DUO 6M
DUO 10, DUO 10C
DUO 11, DUO 11M, DUO 11MC
DUO 20, DUO 20C
DUO 30M
DUO 120A
DUO 125
DUO 250A
DUO 255M (Index C)
UNO 6
UNO 30M
UNO 250A
Busch Pumps: WS1001, WSU1001, WS2001, WSU2001, WS151, WS251, WSU151, WSU251, WS501, WSU501, WA151, WA251, WA501, WAU151, WAU251, WAU150, WAU250, WAU500, WSU150, WSU250, and many more .
Leybold Pumps: SV1200, SV500, SV630, SV750, SV630F, 0165D, 0205D, 0255D, 0305D, 0400B, 0502B, 0630B, 0255 .
If you own any of these pumps, this is the right O-ring for you
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10 in stock
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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
10 in stock
10 in stock
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