HAYWARD GORDON LTD
Page
5
Rev:
1
HRF Series Mixers
Date 11/99
Section: RF
unavoidable the seal housing and lubricator pot should be completely filled with a lubricant
compatible with the sealing fluid to be used in service.
SHAFTS and IMPELLERS
The shaft shipped with your unit was straightened at the factory to within a few thousandths of an
inch. Care should be taken in the storage of the shaft to see that it is fully supported along its
entire length and to see that heavy items are not placed on unsupported sections of the shaft. For
outdoor storage of carbon steel shafts and impellers, a suitable grease or rust preventative should
be applied to the parts.
INSTALLATION AND OPERATION
GENERAL
Proper installation and operation is the key to long trouble free mixer service. The following is a list
of points to cover during installation and operation:
1. Ensure the mixer rotation is correct before permanently wiring the motor.
2. Read all tags, nameplates and this manual prior to operating the unit.
3. Check motor operating amperage against motor nameplate amperage.
4. Do not operate in a fluid with a specific gravity or viscosity higher than that for which the unit is
designed.
5. Do not attempt to start a unit with the impeller buried in solids or in a "set up" fluid.
6. Maintain operating temperatures and pressures of vessel within design limitations for stuffing
box and mechanical seal units.
7. A minimum of 4" radial clearance must be maintained between the impeller and any
obstruction.
8. Any anticipated changes in motor horsepower, mixer speed, shaft length, impeller diameter or
blade width, etc. should be discussed with Hayward Gordon prior to making changes.
MIXER ASSEMBLY
All units are completely assembled except for the following items:
1. The extension shaft must be inserted through the lower bearing replacing the snap ring on the
shaft and coupling the shaft with the sleeve coupling. All setscrews are then to be tightened,
refer to page 14 for diagram.
2. Impellers turning at speeds higher than 100 RPM are statically balanced and are to be
assembled according to the match marks. Values shown in Table III (pg. 8) indicate torquing
requirements.
3. Mixers supplied with in-tank couplings are to be assembled using the hardware supplied and
torqued to values shown in Table III (pg. 8).
