This Viton O-Ring (Part #320520) is a critical sealing component for your Pfeiffer DUO 120A vacuum pump . It measures 12.5 mm x 2.5 mm. 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. If you are rebuilding your DUO 120A pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit (Part # PSK024) for this pump .
This Buna O-ring measures exactly 12.6 mm inner diameter with 2.4 mm thickness. It replaces Part #02120034 . This O-ring is specifically used on Edwards E2M0.7, E2M1, and E2M1.5 pump models . The Buna-N (Nitrile) material offers great oil resistance at a fair price.
10 in stock
10 in stock
This FKM O-ring measures exactly 124.5 mm inner diameter with 3 mm thickness. You get a pack of 2 (PACK 2). It replaces Part #H02121094. This is a standard metric size under BS4518 (RM1245-30) . The FKM material handles high heat and harsh chemicals better than standard rubber.
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) .
Out of stock
Out of stock
10 in stock
This Viton O-ring measures exactly 13.6 mm inner diameter with 2.4 mm thickness. It replaces Part #2122035 This O-ring is specifically used on Edwards E2M28 and E2M30 pump models . The Viton (FKM) material handles high heat up to 200°C and harsh chemicals better than standard rubber.
Out of stock
This Buna O-ring measures exactly 13.94 mm inner diameter with 2.62 mm thickness. It replaces Part #2125013 (cross-reference OB-1240E) . This O-ring is specifically used on Edwards E2M2, E2M5, E2M8, and E2M12 pump models .
Out of stock
10 in stock
This Viton O-ring measures exactly 139.5 mm inner diameter with 3 mm thickness. It replaces Part #02122097. This O-ring is used in Edwards DP series dry pumps and is included in official service kits. The Viton material handles high heat and harsh chemicals better than standard rubber.
Out of stock
this Buna O-ring measures exactly 14.3 mm inner diameter with 2.4 mm thickness.This O-ring is specifically used on Edwards E2M275 and E1M275 pump models
This FKM O-ring measures exactly 14.6 mm inner diameter with 2.4 mm thickness. It replaces Part #H02122036 (cross-reference OB-0820). This is the rotor sleeve O-ring used in RV3, RV5, RV8, and RV12 pump models . The FKM material handles high heat and harsh chemicals better than standard rubber.
This Buna O-ring measures exactly 14.6 mm inner diameter with 2.4 mm thickness. It replaces Part #02120036. This O-ring is specifically designed for Edwards RV series pump models. The Buna-N (Nitrile) material offers great oil resistance at a fair price and is the standard choice for general-purpose vacuum applications .
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