Goulds Pumps 3171 - IOM - Manual (Page 23)

Check Explanation/comment Checked
For outside tank mount and dry pit
applications, install an isolation valve in the
suction line at least two pipe diameters
from the suction.
This allows the line to be closed for pump
inspection and maintenance. The isolation valve
must be kept fully open during operation.
Make sure that the entrance to the suction
pipe is kept adequately submerged below
the free liquid surface.
This prevents vortices and air entrainment.
For an outside tank mount application,
make sure that a column assembly is
installed.
The column assembly allows the fluid that comes
through the lower bushings to flow up through the
column and back through the connection at the
top of the column back to the tank.
Connect the pipe at the top of the pump column
back to the source tank in order to prevent fluid
from entering the thrust bearing.
Steam lines
Precautions
WARNING: Use proper safety precautions when dealing with high pressure air or fluid.
Checklist
Check Explanation/comment Checked
Before you install the pump,
become familiar with the location
of the steam lines.
There are three connections above the support plate:
• Two steam connections
• One condensate return connection.
The steam connections are connected to the tops of the
column and discharge jackets.
Determine which method to use
in order to connect the steam lines.
There are two methods you can use in order to connect
the steam lines:
• You can use both steam lines as input for steam
(preferred method).
• You can use one steam line as input for steam, while
the other steam line is used as a feed through to
additional pumps.
Only use this method if absolutely necessary,
because it is difficult to control the steam at
subsequent pumps.
Before you install the pump,
check the fittings for leaks. Use
plant air or high pressure water.
The jackets are hydrotested by the factory at 100 psi
before shipment. However, the tube fittings can become
loose during transit.
If you use air to check for leaks, use a soap solution at
each joint in order to check for air bubbles.
Provide source of steam at 35 psi
and 300°F (149°C).
Less than ideal conditions require higher pressure steam
in order to keep the correct temperature.
After the pump is brought to
temperature for the first time,
shut down the unit temporarily
and readjust the impeller clearance.
Refer to Impeller clearance setting in the Operations
chapter.
Installation (Continued)
Model 3171 Installation, Operation, and Maintenance Manual 21