$4.48
This is the Pfeiffer Part# 4070262, a 15 x 5 mm O-ring made of high-performance Viton (FKM) rubber. It is specifically designed to replace the worn seal in Pfeiffer UNO 1.5A and DUO 1.5A vacuum pumps . Keep your vacuum pump leak-free and running efficiently with this direct-fit, durable seal.

O-ring, 15 x 5 mm - Viton, Part# 4070262

O-ring, 15 x 5 mm - Viton, Part# 4070262
This is the Pfeiffer O-ring, Part# 4070262. It is made to fit specific pump models perfectly. It restores the seal and stops air from leaking in.
Exact Fit for Your Pfeiffer Pump
You don’t want to guess with rubber parts. If the size is wrong, the pump won’t work right. This O-ring is built to the exact factory size: 15 mm inside diameter (ID) with a thickness (cross section) of 5 mm .
Because it is a genuine part for the Pfeiffer family, it fits the following pump models without any trouble:
Pfeiffer UNO 1.5A
Pfeiffer DUO 1.5A
This O-ring is made from Viton (also known as FKM). We chose Viton for a reason. It is much tougher than standard rubber.
Here is why Viton works best for vacuum pumps:
Handles High Heat: Your pump can get hot during long runs. Viton stays strong even when the temperature goes up.
Fights Chemicals: It resists oils, fuels, and acids. It won’t swell up or break down when it touches pump oils.
Low Gas Flow: Viton is great at stopping gases from passing through. This helps you reach a deep vacuum level .
Temperature Range: It works reliably in cold and hot conditions (roughly -15°F to 400°F)
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10 in stock
This Valve Flap (Part #192348) is a replacement part made specifically for Pfeiffer UNO 1.5A and DUO 1.5A vacuum pumps . Its main job is to regulate the flow of gases inside your pump, which is essential for achieving and maintaining the right vacuum pressure . If you are rebuilding your pump, you will need one of these valve flaps for a complete repair .
10 in stock
10 in stock
10 in stock
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This Shaft Seal (Part #4083174) is a replacement part made for two popular Pfeiffer pump models: the UNO 1.5A and the DUO 1.5A . Its main job is to seal the rotating shaft where it enters the pump body. This stops oil from leaking out and keeps air from getting in. If you are rebuilding your small Pfeiffer pump or fixing a leak, this is the part you need. It is also known by the cross-reference number SV0004 and is included in the official repair kit for these pumps .
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 spring (Part #3838132SV) is a replacement part used across a wide range of Pfeiffer UNO and DUO series vacuum pumps. It is a critical component found in valve and flap mechanisms, including models like UNO1.5A, DUO1.5A, UNO35, DUO35, DUO65, DUO11, and DUO6 . If you are rebuilding your pump or restoring its performance, this spring is an essential part of the job. It is also known by the cross-reference number B0042 .
10 in stock
10 in stock
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