Figure 20: Constant level oiler
Grease Lubrication: Mixers are shipped with grease installed.
Prolonged Shutdown: If the mixer is put into operation after prolonged shut-down, flush out the bearings
and bearing frame with a light oil or kerosene to remove contaminants. During flushing, rotate shaft slow-
ly. Finally, flush the bearing housing with the proper lubricating oil to insure oil quality after cleaning.
Regrease bearings prior to starting as described in
5.3 Maintenance of bearings on page 29
WARNING:
Operation of the unit without proper lubrication will cause bearing failure and mixer seizure.
4.3.3 Shaft sealing
Mechanical Seal: Mixers are shipped with mechanical seals installed. The most common seal with this
model is the cartridge type. Cartridge seals are preset at the factory and require no field settings, unless
seal is removed.
Connection of Sealing Liquid: For satisfactory operation, there must be a liquid film between seal faces
to lubricate them. Refer to seal manufacturer's drawing for location of taps. The primary method used to
flush/cool the seal is an external flush where a clean, cool, compatible liquid is injected from an outside
source directly into seal gland between the double seal faces. Flushing liquid must be at a pressure 1.0
kg/cm2 (15 PSI) above seal chamber pressure. Injection rate should be 4-8 liters per minute (1-2 gallons
per minute).
4.4 Starting mixer
1.
Make sure inlet valve and any recirculation or cooling lines are open.
2.
Make sure outlet valve is open as dictated by system conditions.
3.
Start Driver.
4.4 Starting mixer
26
3501 Installation, Operation, and Maintenance Instructions
