Atlas Copco Oil-Sealed Rotary Vane Vacuum Pump GVS 200A

When the exhaust filter elements are clogged, the valves open and the filters are bypassed. Oil mist at the exhaust, and/or high oil consumption are signs that the exhaust filters are clogged

The exhaust filters must be replaced more frequently if subject to increased oil cracking products at high operating temperatures and/or aggressive media

Remove the exhaust flange with gasket. Unscrew the lock nut and remove spring between its both washers: take out the exhaust filter element(s)

Take out the pressure relief valves and check that they move freely, and seal properly

Re-assemble in the reverse sequence. Make sure that the exhaust filter elements are properly centered and positioned. Install spring between its both washers, and tighten stop nut, fully home with the 10 mm (0.39 inch) box wrench;

Remove the intake filter element from the housing

Clean the intake filter element in one of the following ways

▪ Hand washing: Soak and agitate element in a warm water and mild detergent solution. Allow adequate time for the element to air dry (24 hours minimum). Do not install a damp element. This will cause higher initial pressure loss and rapid dirt loading

▪ Compressed air cleaning: Using approximately 7 bar(e) (100 psi(g) or 5.25 Torr(e)), direct air flow at inside of element towards pleats. Blow off the outside of the element directing the air flow down to avoid embedding dirt in the media. Blow off the inside again to remove any dirt that might be on the clean side of the element

▪ Vacuum cleaning: Point the vacuum cleaner to the dirty side (outside of element) only, using a vacuum of approximately 100 mbar(a) (75 Torr(a)). A crevice tool is recommended

▪ Hand cleaning: Hold element down with one hand and move other hand across the fins in a strumming motion. This action will dislodge most of the dirt

The element is ready to be reused;

Warning: This procedure requires trained personnel with PPE!

Check recommendations on the motor supplier’s website

Motor condensate drain plug removed?

Sign off on the motor bearing replacement

If the pump is cold, run the pump with closed suction intake for 10 minutes to warm up the oil

Stop the pump and disconnect it from the mains

Open the oil drain valve and drain the oil completely into a container large enough to hold all the oil and tilt the pump slightly (if possible)

Close the oil drain valve and fill with new oil through the filler plug up to the middle of the oil sight glass. The oil level must not exceed the allowed maximum level

Wipe off eventual oil spills from the pump and/or the floor

Connect to mains again and verify correct rotation direction of the pump

Apply a thin film of oil on the gasket of the new oil filter

Clean carefully the contact surface of the gasket on the tank

Fill with new oil following above mentioned instructions

Sign off on the oil filter change