Goulds Pumps 3796 i-FRAME - IOM - Manual (Page 60)

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.
Packed stuffing box option
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
The factory does not install the packing, lantern ring, or split gland.
These parts are included with the pump in the box of fittings. Before you start the pump, you must install
the packing, lantern ring, and split gland according to the Packed stuffing box maintenance section in the
Maintenance chapter.
Connection of sealing liquid for a packed stuffing box
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
Commissioning, Startup, Operation, and Shutdown (Continued)
58 Model 3796 i-FRAME Installation, Operation, and Maintenance Manual