Description
An O-ring is a simple, circular gasket. It sits in a special groove between two parts of your pump. When you tighten those parts together, the O-ring gets compressed. This creates a tight barrier that stops air or oil from leaking.
This specific O-ring has two important features: its size and its material.
Its size is 92 mm by 3 mm. This means it has a 92 mm inner diameter and is 3 mm thick. This exact size is crucial for it to fit perfectly in its designated spot in your pump.
It is made from Viton. Viton is a special type of synthetic rubber. It is much better than standard rubber for vacuum pumps. Viton can handle higher temperatures. It also resists oils and chemicals very well. This means the seal lasts longer and performs more reliably.
Use this O-ring as the direct, replacement for Leybold part number 320117. It is designed for Trivac D2.5E and D1.2E pump models. Replacing a worn O-ring with this exact part restores your pump’s integrity. It prevents leaks, protects performance, and is a simple step in good pump maintenance
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