Replacing the roughing pump’s oil demister element 5-101
To fit the new oil demister element
1. Fit the spring to the new oil demister element.
2. Holding the oil demister element slightly elevated to prevent the loss of
the spring, fit the exhaust flange to the oil demister element.
3. Use the 10-mm wrench to fit and tighten the nut that secures the oil
demister element to the exhaust flange.
Warning: The pump oil can be contaminated with analyte
accumulated during normal operation. Always wear
chemical-resistant, powder-free gloves when replacing the oil
demister element.
Caution: The nut that secures the oil demister element to the
exhaust flange must not be overtightened; ensure that only
approximately 1 mm of thread is exposed beyond the nut when it
is tightened.
1 mm exposed thread
after tightening
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