User guide

Final piping checklist

Check Explanation/comment Checked

Check that the shaft rotates smoothly. Rotate the shaft by hand. Make sure there is no

rubbing that can lead to excess heat generation or

sparks.

Re-check the alignment to make sure that

pipe strain has not caused any

misalignment.

If pipe strain exists, then correct the piping.

Stuffing box installation

This pump is a seamless design. Therefore, when temperatures exceed 180°F (82°C), you must move the

thrust bearing away from the heat source in the pump by adding the upper stuffing box. Air can then

circulate around the bearing in order to keep it cool.

The upper stuffing box is also used to minimize vapor emissions when the pump handles controlled

substances.

1. Motor support

2. Upper stuffing box

3. Gasket

4. Discharge pipe

5. Support plate

6. Gasket

7. 3 in. (76.2 mm) NPT female connection

8. Pit cover

9. Gasket

Installation (Continued)

22 Model 3171 Installation, Operation, and Maintenance Manual