Vacuum Furnace Door Seal Grease

A wet organic or silicone compound based oils and greases b dry lubricants including ptfe teflon and metal dichalcogenide compounds e g.

Vacuum furnace door seal grease. Do not grease the lip seal. How to seal a leaking o ring with grease. Despite what one may think excess vacuum grease does not aid in sealing and should be removed as it is a getter for shop debris which will interfere with the o ring s ability to seal. Clean the chamber door or bottom head flange and lightly grease the o ring with a thin coating of high quality vacuum grease.

The types of lubricants for vacuum service fall into three general categories. Reapply a thin coating of vacuum grease as necessary. Lubricants for vacuum service are a diverse family of highly formulated products. Molybdenum disulfide tungsten diselenide and c metal on metal combinations.

The first q a community for vacuum furnace end users and operators. 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. Inspect and wipe clean this seal each time the door is opened after a furnace cycle. The role of lubricants in vacuum furnace seals.

On o ring seals look for cracks lack of elasticity flat spots dirt and metallic fines. Wipe the door o ring and flange with a clean lint free rag before closing the door. As such it tends to be the cause of pump down issues about 80 of the time. 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. If the pumping system is operating correctly then one of these failure modes is likely the cause. Here the vapor pressure of the grease should be noted increases greatly with the temperature and should be well below the desired operating pressure. 1 if the door that houses the lip seal rotates the lip seal should be lubricated with dry graphite powder.

A damaged door seal vacuum furnace leaks and or hot zone contamination. Figure 11 16 debris ladden door seal. Check the o ring vacuum seal on the furnace door for grit and dirt that might cause vacuum leaks.