This Viton O-Ring (Part #320534) is a critical sealing component for your large Pfeiffer DUO vacuum pump . It measures 180 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 designed specifically for the Pfeiffer DUO 255M (Index C) pump model . If you are rebuilding your large DUO pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit (Part # PSK028) and the Major Overhaul Kit (Part # PMK028) for this pump .
10 in stock
10 in stock
This Viton O-ring measures exactly 19 mm inner diameter with 3 mm thickness. It replaces Part #23714034 This O-ring is specifically used on Edwards EH Booster and QMB Blower pump families, including QMB250, EH250, QMB500, and EH500 models . The Viton (FKM) material handles high heat up to 200°C and harsh chemicals better than standard rubber.
This Buna O-ring measures exactly 19.6 mm inner diameter with 2.4 mm thickness. It replaces Part #2120041 . This O-ring is specifically used on Edwards E2M2, E2M5, and E2M8 pump models . The Buna-N (Nitrile) material offers great oil resistance at a fair price .
Out of stock
10 in stock
Out of stock
This O-ring has a 2 5/8 inch inner diameter and a 0.139 inch cross-section (thickness) . It replaces Part #085-020-514 This is a standard inch-size O-ring used in Edwards vacuum equipment. The exact material is not specified, so please verify your requirements before ordering.
10 in stock
This Viton O-Ring (Part #4070015) is a small but critical sealing component for your Pfeiffer vacuum pump . It measures 2.2 mm (inner diameter) x 1 mm (cross section) . Made from Viton, a high-performance synthetic rubber, this tiny O-ring creates a tight, reliable seal in a precise location within your pump.
This O-ring is designed for the Pfeiffer UNO 1.5A and DUO 1.5A 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 Minor Repair Kit (Part # 080010) for these pumps .
This FKM O-ring measures exactly 2.437 inches inner diameter with 0.139 inches cross-section (thickness). It replaces Part #H02126165. This is an inch size O-ring (approximately 61.9 mm ID x 3.53 mm CS). The FKM material handles high heat and harsh chemicals better than standard rubber.
Out of stock
This Viton O-ring measures exactly 20 mm inner diameter with 2.5 mm thickness. It replaces Part #320081. This is a standard metric size used in Edwards KF/NW flange assemblies and vacuum pumps . The Viton (FKM) material handles high heat up to 200°C and harsh chemicals better than standard rubber
10 in stock
This FKM O-ring measures exactly 207 mm inner diameter with 3 mm thickness. It replaces Part #H02122234. This O-ring is used in Edwards nXDS dry scroll pumps , EH/QMB booster blowers , and E1M/E2M series pumps . The FKM material handles high heat and harsh chemicals better than standard rubber.
This Buna O-ring measures exactly 21.5 mm inner diameter with 3 mm thickness. It replaces Part #P23724073 (cross-reference OB-1785). The Buna-N material offers great oil resistance at a fair price and is a common seal used in Edwards vacuum pumps.
This FKM O-ring measures exactly 21.6 mm inner diameter with 2.4 mm thickness. It replaces Part #H02122042. This O-ring is used in Edwards DP series dry pumps and is included in official O-ring kits . The FKM material handles high heat and harsh chemicals better than standard rubber.
This Buna O-ring measures exactly 21.6 mm inner diameter with 2.4 mm thickness. It replaces Part #2120042 (cross-reference OB-0940) . This O-ring is used on Edwards E2M12, E2M0.7, E2M1, and E2M1.5 pump models .
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