This is the Part# 23970121, a 55 mm x 3 mm O-ring made from high-quality Viton rubber . It is a direct replacement seal used on Ebara, Leybold, and Pfeiffer vacuum pumps including Ebara D40BCS, Ebara D65BCS, Leybold Trivac series, and Pfeiffer UNO30M models . You will also find this O-ring included in several major seal kits and repair kits
This Viton O-Ring (Part #23970504) is a critical sealing component for your Pfeiffer vacuum pump . It measures 55 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 fits the Pfeiffer DUO 250A and UNO 250A pump models, as well as Busch models WA501, WAU501, WS501, and WSU501 . 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 250A (PSK027) .
Leybold Trivac pump sealed and running efficiently with this Viton O-ring . The O-ring, 56 x 2 mm – Viton, is a direct replacement part designed for a perfect fit on Trivac pump models D16BCS and D25BCS .
10 in stock
This FKM O-ring measures exactly 57.6 mm inner diameter with 2.4 mm thickness. It replaces Part #H02122055 (cross-reference OV-0715). This O-ring is used in Edwards DP series dry pumps and RV series rotary vane pumps . The FKM material handles high heat and harsh chemicals better than standard rubber.
10 in stock
Leybold Sogevac SV1200 pump sealed and running smoothly with this Buna O-ring. The O-ring, 58 x 3 – Buna, is a direct replacement part designed for a perfect fit on the Sogevac SV1200 pump model.
Leybold Sogevac pump sealed and running efficiently with this Viton O-ring . The O-ring, 58 x 4mm – Viton, is a direct replacement part designed for a perfect fit on Sogevac pump models including the SV500, SV630, SV750, and SV630F .
10 in stock
This FKM O-ring has a 6 1/2 inch inner diameter and a 7 inch outer diameter (which gives it a 1/4 inch thickness). It replaces Part #085-042-116 [citation:085-042-116]. The FKM (Viton) material handles high heat and harsh chemicals better than standard rubber.
10 in stock
Leybold Sogevac pump sealed and running efficiently with this Viton O-ring . The O-ring, 6.02 x 2.6 mm – Viton, is a direct replacement part designed for a perfect fit on Sogevac pump models including the SV10B and SV16B , and is also used in cartridge cover assemblies for the SV16 and SV25 .
This Buna O-ring measures exactly 6.6 mm inner diameter with 2.4 mm thickness. It replaces Part #2120028 This O-ring is used on a wide range of Edwards E1/E2M pump models, including E2M2, E2M5, E2M8, E1M18, E2M18, E2M12, E2M0.7, E2M1, E2M1.5, E2M28, and E2M30 .
This Buna O-ring measures exactly 6.6 mm inner diameter with 2.4 mm thickness. It replaces Part #320038 (cross-reference OB-0890E) . This O-ring is used in Edwards E1/E2M pump families and is included in major overhaul and seal kits for E1M18, E2M18, and other models . The Buna-N (Nitrile) material offers great oil resistance at a fair price.
This Viton O-ring measures exactly 6.6 mm inner diameter with 2.4 mm thickness. It replaces Part #02120028V. This O-ring is used on a wide range of Edwards E1/E2M pump models including E2M0.7, E2M1, E2M1.5, E2M2, E2M5, E2M8, E2M12, E2M18, E2M28, E2M30, and E1M18 . The Viton (FKM) material handles high heat up to 200°C and harsh chemicals better than standard rubber.
10 in stock
Leybold Sogevac pump sealed and running efficiently with this Viton O-ring. The O-ring, 60 x 2 mm – Viton, is a direct replacement part designed for a perfect fit on Sogevac pump models including the SV500B, SV630B, SV630BF, SV750B, and SV750BF .
This Buna O-ring measures exactly 61.6 mm inner diameter with 2.4 mm thickness. It replaces Part #02120057. This O-ring is used on a wide range of Edwards E1/E2M pump models including E1M18, E2M18, E1M40, E2M40, E1M80, and E2M80 . The Buna-N (Nitrile) material offers great oil resistance at a fair price.
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