Vacuum Furnace Door Seal Grease

Do not grease the lip seal.

Vacuum furnace door seal grease.

Click here to access the step by step instructions for the o ring or lip seal installation on a rotating vacuum furnace door. The vacuum grease smooth out small irregularities on the sealing surfaces and the surface of the o ring and thereby improves particularly at low degrees of deformation the sealing effect. Here the vapor pressure of the grease should be noted increases greatly with the temperature and should be well below the desired operating pressure. 2 if the door has a true autoclave design whereas the locking ring rotates around the stationary door then either vacuum grease and or graphite dust may be utilized.

Check the o ring vacuum seal on the furnace door for grit and dirt that might cause vacuum leaks. Inspect and wipe clean this seal each time the door is opened after a furnace cycle. Lubricants for vacuum service are a diverse family of highly formulated products. How to seal a leaking o ring with grease.

Wipe the door o ring and flange with a clean lint free rag before closing the door. Reapply a thin coating of vacuum grease as necessary. The role of lubricants in vacuum furnace seals. A damaged door seal vacuum furnace leaks and or hot zone contamination.

The types of lubricants for vacuum service fall into three general categories. As such it tends to be the cause of pump down issues about 80 of the time. 1 if the door that houses the lip seal rotates the lip seal should be lubricated with dry graphite powder. Figure 11 16 debris ladden door seal.

Graphite powder should be used on the lip seal. Vacuum grease which you should use on the face of the seal and why methods for keeping the seal off the ground and clean during the installation process. Clean the chamber door or bottom head flange and lightly grease the o ring with a thin coating of high quality vacuum grease. On o ring seals look for cracks lack of elasticity flat spots dirt and metallic fines.

The first q a community for vacuum furnace end users and operators. A wet organic or silicone compound based oils and greases b dry lubricants including ptfe teflon and metal dichalcogenide compounds e g. Molybdenum disulfide tungsten diselenide and c metal on metal combinations.