Goulds Pumps AF (Axial Flow) (6"-36) MXR Bearings" - Manual (Page 14)

12 AF (6-36) IOM
The seal prevents corrosion and allows for easy
impeller replacement. The impeller is dynamically
balanced (double plane) per ISO 1940 to a quality
grade G-16.
Shaft – The shaft is cantilevered into the pump elbow
to eliminate the need for internal bearings. It is
designed to have small deflections, high critical
speeds, and corrosion resistance. The shafts are
stepped for easy assembly with the impeller.
Bearings - The inboard radial bearing absorbs radial
loads and aligns the pump shaft. It is either a ball or
spherical roller bearing, depending on pump size. The
outboard thrust bearing absorbs thrust loads and
comes as either back-to-back angular contacts or a
single taper roller bearing, depending on pump size.
Lubrication is by flood oil or grease, depending on
customer requirements.
Oil Cooling (Optional) – An oil cooling option is
available on 12” and larger sizes. A coiled tube
mounted inside the bearing housing circulates water to
cool the oil bath. It is attached to the bottom of the bearing housing by a removable bottom plate and
gasket. It is generally used when process
temperatures cause excessive heat build up in the
bearing housing and or bearings.
Configurations and Drives – Most AF pumps are V-
belt driven to allow for varying speeds. V-belts can be
configured for side by side, overhead, under-slung, or
vertical operation. The pumps can also be configured
with gear reducers and or jack shafts for direct connect
operation.
Maximum Sphere Size – The maximum solid size
that the AF can pass depends on the pump size. The
following are the maximum sphere sizes for each
pump:
Pump
Sphere Pump Sphere
Size Size Size Size
6” 1.5” 18” 4.5”
8” 2.0” 20” 5.0”
10” 2.5” 24” 6.0”
12” 3.0” 700mm 6.0”
14” 3.5” 30” 7.5”
16” 4.0” 36” 9.0”
NAMEPLATE INFORMATION
Every Goulds pump has a nameplate that provides
information about the pump, including hydraulic
characteristics. The nameplate for the AF is located on
the bearing housing. Note the format of the pump
size: Discharge X Suction - Impeller Diameter in
inches (Example 20”X20”-20”, see Fig. 1). When
ordering spare parts you will need to identify pump
model, size, serial number, and the item number of
required parts. Information can be found in this
manual.
Fig. 1