HAYWARD GORDON LTD
Page
16
Rev:
1
HRF Series Mixers
Date 11/99
Section: RF
STUFFING BOX INSTRUCTIONS
GENERAL
The purpose of a stuffing box packing is NOT TO STOP leakage, but to limit it to a practical
amount. If the gland is tightened to prevent leakage, packing life will be shortened and shaft
damage may occur.
For best stuffing box performance, lubricant should be introduced CONTINUOUSLY at pressures
between 5 to 15 psi above tank pressure.
If intermittent lubrication is provided by means of a grease gun, care must be taken to prevent
over-lubrication. An amount of grease that fills the lubricant cavity and is distributed evenly
throughout the packing area is sufficient for proper lubrication.
PACKING SPECIFICATIONS
The type packing furnished for this unit is specified on the main assembly drawing.
If the packing furnished is not satisfactory for the service conditions it should be replaced.
LUBRICATION
The stuffing box is shipped without lubricant because of federal regulations and the danger of
using a lubricant that may contaminate the product.
Low pressure stuffing boxes, 0-25 psi, have been impregnated with lubricant and are not supplied
with lantern rings.
NOTE:
Before using, please check that packing and lubricant is of high quality, physically and
chemically suitable for the service conditions.
START UP INSTRUCTIONS—STUFFING BOXES
1. Prior to initial operation, all stuffing boxes should be carefully assembled in accordance with
instruction on Packing Procedure, Section P1-SB, Page 2.01. In addition, the run-in procedure as
outlined below should be followed to insure proper seal operation and increased packing life.
a. Tighten the gland nuts to ''finger tightness".
b. Start the mixer and run it until the stuffing box has reached a constant operating temperature.
Stop the mixer and tighten diagonally opposite gland nuts. (Note) When tightening the gland nuts,
be careful to avoid cocking the gland. Even tightening of the gland will seat the packing while it is
warm and plastic.
c. Again, loosen gland nuts to finger tightness and restart the mixer. Leakage may be excessive,
but do not take up on the gland nut for the first 20 to 30 minutes.
