Goulds Pumps AF (Axial Flow) (6"-36) MXR Bearings" - Manual (Page 13)

AF (6-36) IOM 11
GENERAL INFORMATION
PUMP DESCRIPTION ................................................................................... 11
NAME PLATE INFORMATION ..................................................................... 12
RECEIVING THE PUMP ................................................................................ 13
INSTALLATION AND OPERATION CHECKLIST ........................................ 14
PUMP DESCRIPTION
The AF pump generates flow by the thrust or lift action
of rotating axial vanes of the impeller. Axial flow
pumps generate high flow rates and low head which
are ideal for re-circulation, evaporator, and generator
cooling systems. The AF has an elbow that directs the
flow through the suction and out the discharge end of
the pump. It can be used in the top or end suction
configuration depending on the customer’s needs.
Refer to original factory documentation for the
arrangement of your pump. The model AF is based on
(6) power ends and (12) hydraulic pump sizes. The
first (3) power ends have ball bearings, the others
have taper and spherical roller bearings. Groupings
are as follows:
Power Inboard
Outboard Pump
End Bearing Bearing Size
1MXR Ball (2) Ang. Contact 6”, 8”, 10”
2MXR
Ball (2) Ang. Contact 12”, 14”
3MXR
Ball (2) Ang. Contact 16”, 18”
4MXR
Sphrcl Roller Taper Roller 20”, 24”
5MXR
Sphrcl Roller Taper Roller 700mm, 30”
6MXR
Sphrcl Roller Taper Roller 36”
Elbow – The elbow is cast with 150# flat face suction
and discharge flanges, it comes with an opening in the
rear for a back-pullout. The back-pullout consists of
the bearing housing, shaft, and impeller. The elbow
has cast feet for mounting to a sub-base or it can be
mounted directly in the piping. It also comes with an
optional elbow liner.
Elbow or Casing Liner (Optional) – An optional liner
provides erosion and corrosion protection for longer
elbow or casing life. It may also come with a serrated
inside diameter for pumping stringy material.
Back-Pullout - The back-pullout is based on the (6)
power ends listed previously. It consists of a bearing
housing, bearings, stuffing box cover, locknuts,
lockwashers, labyrinth oil seals, shaft, shaft sleeve
(w/packing), oil slinger (20” ~36”), impeller, keys, shaft
washer, and a front and back foot.
Stuffing Box Cover – The cast stuffing box cover is
used to close the rear of the elbow and provide a
mounting surface for a mechanical seal or stuffing box
and gland. Inside it has a machined flat face with a (3)
or (4) bolt pattern to accept a stuffing box or standard
cartridge mechanical seal. When used with a
mechanical seal it has a cast in 5 deg. taper bore
opening to assist in ejecting particles from the seal
area. The cover comes with adjusting ears that allow
for centering on the shaft and also to center the
impeller in the elbow.
Mechanical Seal Adapter (Optional) – An optional
adapter is used when the mechanical seal requires a
restrictor bushing. The restrictor bushing is supplied
with the mechanical seal.
Optional
Packed Stuffing Box / Sleeve – The stuffing box is
cast and is separate from the elbow and stuffing box
cover. It comes with a replaceable wear sleeve that is
keyed to the shaft. Included are 5 rings of packing and
a lantern ring to seal the shaft area. Two flush ports
provide packing lubrication. A gland is used for
packing adjustment. The stuffing box can also be
modified to accept a mechanical seal if required.
Casing – A sacrificial wear casing is provided on the
700mm and 36” sizes. Adjusting lugs are used to
center the casing relative to the impeller. The casing
has 150# flanges for mounting to the elbow and comes
with an optional liner.
Impeller - The impeller is cast with (4) fixed vanes. It
is machined with internal steps for easy assembly onto
the shaft. It comes configured for 0 or +5 degree,
clockwise or counterclockwise rotation, and top or end
suction. The impeller is held in place with a shaft
washer and bolts. The 700mm and 36” impellers
come with cover plates and o-rings, to seal them from
the pumpage.
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