Goulds Pumps NM 3196 i-FRAME - IOM - Manual (Page 54)

3. Replace the fill plug.
Lubricate the bearings with pure oil mist
Oil mist is an optional feature for this pump.
• To lubricate bearings with pure oil mist, follow the instructions provided by the manufacturer of the
oil-mist generator.
The inlet connections are on the top of the bearing frame.
Greased-for-life bearing lubrication
The bearing manufacturer fills greased-for-life bearings with grease and seals them at the factory. You do
not need to lubricate or seal these bearings. Refer to the Maintenance chapter for re-greasing and
maintenance procedures for these bearings.
Shaft-sealing options
In most cases, the manufacturer seals the shaft before shipping the pump. If your pump does not have a
sealed shaft, see the Shaft-seal maintenance section in the Maintenance chapter.
This model uses these types of shaft seals:
• Cartridge mechanical seal
• Conventional inside-component mechanical seal
• Conventional outside-component mechanical seal
• Packed-stuffing-box option
Mechanical seal options
Pumps are usually shipped with mechanical seals installed. If they are not, then refer to the mechanical seal
manufacturer's installation instructions.
These are the mechanical seal options for this pump:
• Cartridge mechanical seal
• Conventional inside component mechanical seal
• Conventional outside component mechanical seal
Connection of sealing liquid for mechanical seals
Seal lubrication is required
Seal faces must have liquid film between them for proper lubrication. Locate the taps using the illustrations
shipped with the seal.
Seal flushing methods
You can use these methods in order to flush or cool the seal:
Method Description
Product flush Run the piping so that the pump pushes the pumped fluid from the casing and
injects it into the seal gland. If necessary, an external heat exchanger cools the
pumped fluid before it enters the seal gland.
External flush Run the piping so that the pump injects a clean, cool, compatible liquid directly
into the seal gland. The pressure of the flushing liquid must be 5 to 15 psi (0.35 to
1.01 kg/cm 2 ) greater than the seal chamber pressure. The injection rate must be 0.5
to 2 gpm (2 to 8 lpm).
Other You can use other methods that employ multiple gland or seal chamber
connections. Refer to the mechanical seal reference drawing and piping diagrams.
Commissioning, Startup, Operation, and Shutdown
52 Model NM 3196 i-FRAME Installation, Operation, and Maintenance Manual