Impeller:
Impeller matched to casing for high efficiency
and low NPSH. Fully open, has partial shrouds
for maximum vane support without high thrust
inherent in closed impellers. Stuffing box pressure
reduced and entrance of solids prevented by
back pump-out vanes. Large smoothly contoured
flow passages combine best slurry and solid
handling ability. Impeller is locked on shaft
with impeller lock-nut and are sealed by PTFE
gasket. State of the art casting methods provide
smoothest possible surfaces for highest efficiency.
All impellers are statically and dynamically
balanced
Stuffing
box cover:
Encloses back of causing and contains stuffing
box chamber. Cover is fastened to frame or adopter
so that a spare back pull-out asembally can
be stocked completely assembled.Cover can be
supplied with jacket for cooling stuffing box
chamber in high temperature services. Jacket
can also be used for heating viscous or high
freezing point liquids.
Packed box has five rings of packing and a lantern
ring. Quench gland with water tapes and an auxiliary
ring of packing is standard. Gland is spilt
for easy removal. Tapped openings to latern
ring permit "in" and "out"
sealing,external flushing or lubrication as
required. Stuffing box is completely machined
for mechanical seal installation,either originally
or as a field conversion. Inside, outside, unbalanced,
balanced, single, double or tandem seals with
any required gland, throat bushing, throttle
bushing and flushing lines furnished to meet
individual sealing problems. Gland completely
confines stationary mating ring gasket.
Bearing
Frame:
Sturdy cast iron construction provides rigid
bearing alignment and shaft support. Contains
large oil reservoir, with water jacket. Oil
level maintained by constant level oiler with
water jacket. Oil seals on each end and oil
breather fully protect oil from contamination
while allowing for expansion or contraction
of air caused by ambient 0 temperature change.
To handle liquids above 175 C, cast integral
cooling chamber is designed for 600 kpa working
pressure or 900 kpa test pressure.
Shaft:
A single piece shaft is designed for 0.05 mm
maximum deflection at stuffing box face.All
critical surfaces ground to less than 0.8 micron.
Shaft
Sleeve:
Renewable shaft sleeve is positive driven,hooktype,
with one end free to expand with temperature
variations, PTFE gasket prevents leakage under
sleeve. Sleeve permits application of inside
balanced mechanical seals where required.
Bearings:
Inboard bearing is pressed on shaft and is free
to float axially in frame-carries radial load
anly. Outboard bearing is shouldered and locked
on shaft with locknut and washer and in bearing
housing to carry radial and any unbalanced thrust
load. All bearing fits are precision bored.
Inboard bearing is single row, deep groove.
Outboard bearing is double row, deep groove
angular contact. Both bearing are sized for
two year minimum life.
Base
Plate:
Heavy duty MS Channel base plate with large
holes. Only three sizes of base plates accomodate
all pumps sizes and all applicable IS or IEC
frame size motors.
Coupling:
A standard spacer type coupling is furnished
to take full advantage of the back pull-out
feature. Factory selected coupling from leading
manufacturers are supplied unless atherwise
specified.
Specification:
Based on ANSI B73.1 |
