$12.04
This Viton O-Ring (Part #PL23970419) is a critical sealing component for your vacuum pump. It measures 125 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 and Leybold pump brands . It fits the Pfeiffer DUO 120A, DUO 125, DUO 250A, DUO 255M (Index C), UNO 250A and Leybold Ruvac WAU2000, WSU2000, WA2001, WAU2001, WS2001, WSU2001 pump models . 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 Kit for the DUO 120A (PSK024) and the Overhaul Kit for the DUO 125 (PMK025) .
O-ring, 125 x 5 mm - Viton, Part# 23970419
O-ring, 125 x 5 mm - Viton, Part# 23970419
This is a Viton O-ring. Its part number is 23970419. 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 125 mm on the inside and has a thickness of 5 mm .
This O-ring is made for several pump models across different brands :
Pfeiffer Pumps:
DUO 120A
DUO 125
DUO 250A
DUO 255M (Index C)
UNO 250A
If you own any of these pumps, this is the right O-ring for you. It is also included as a standard component in several repair kits
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