O-ring, 240.67 x 6.99 mm – Buna, Part# 2125091

This O-ring is a direct replacement for Edwards part number 2125091 . It is made from Buna material. You may also hear it called Buna-N or Nitrile rubber . This is the standard, trusted choice for most vacuum pump seals.

This O-ring is strong enough to handle the squeeze inside your pump. It keeps its shape and does not take a permanent set. That means your pump stays sealed for longer. The size is exactly 240.67 mm inside diameter and 6.99 mm thick.

What you need to know about temperature
This Buna O-ring works best from -30°C to 100°C (-22°F to 212°F) . It likes oils and fuels. But keep it away from strong sunlight, ozone, and harsh weather for long periods. Those things can make it crack over time .

Easy to replace
Just take out the old ring, clean the groove well, and fit this new one. It is a standard size. You do not need any special tools.

Save money by buying the exact replacement part. Do not buy a whole repair kit if you only need one seal. Get your Edwards pump working like new again today.