MODEL 20DV, 20CPV VARIABLE
VOLUME PUMP, 20DX, 20CPX, BYPASS HEAD PUMP,
20D, 20CP SOLID HEAD PUMP RATED 20 GPM
@ 1140RPM (MAXIMUM RATING 30 GPM @ 1800 RPM)
PUTTING PUMP INTO SERVICE
CAUTION: When receiving pump, carefully
check for damage, broken port seals, and misalignment
incurred during shipping.
CORRECT PIPING HOOK-UP: The series 20
pump comes with two 1 1/2" N.P.T. ports (1
1/4" optional) designed for use with schedule
40 steel pipe. Connect piping based on direction
of shaft rotation.
SERIES 20 CW (CLOCKWISE) rotation pump
has the suction port on the right side and discharge
port on top (VIEWED WITH SHAFT END TOWARDS YOU),
and indicated by arrows cast into body.
SERIES 20CCW (COUNTER CLOCKWISE) rotation
pump has the suction port on the left side and
discharge on top.
- Any pump may be run in reverse temporarily
for such purposes as stripping lines etc.
WARNING: CAVITATION COULD ENSUE
MOUNTING AND ALIGNMENT
The following could cause misalignment:
- Warped base plate (correct by shimming pump
and drive components)
- Pipe strain (correct by using hangers or appropriate
If pump is connected to drive member by couplings,
shim components until coupling halves are aligned.
To prevent misalignment of pump and drive components,
fasten base securely in place using the foundation
bolt holes provided.
- SHAFT SHOULD ALWAYS BE TURNABLE BY HAND
- As a last check before starting pump: remove
gland nuts and slide packing gland out of housing.
If gland does not slide into housing without
interference, pump and drive shafts are misaligned.
DIRECT MOTOR DRIVE "(M/S and M)"
UNITS and Closed Coupled "(CFM)" UNITS:
Abutting shafts must be at least 1/8 of an inch
apart and coupling inserts and/or chains should
be loose enough to prevent end thrust on pump
shaft. We recommend couplings with metal inserts,
not rubber or plastic.
BELT DRIVEN "(BD)" UNITS and OPEN
GEAR "(MO)" UNITS: An outboard bearing
must be used to prevent side thrust on pump shaft.
Pump shaft must be free to slide longitudinally
through outboard bearing, so that rotor group
will not be forced against pump case components.
For BD units, align sheaves using straight edge
or stretched cord. For MO units, proper alignment
and engagement of gear and pinion can be checked
by passing foil or cellophane through them. CAUTION:
Use gear and pinion set of same pressure angle
else fibre motor pinion life will be short.
NOTE: WE ARE NOT RESPONSIBLE
FOR ANY ITEM NOT OF OUR MANUFACTURE.
The packing gland serves a dual function; first
as packing follower and second as a bearing which,
with the shaft housing bushing, forms a support
for the rotor and shaft. As shipped from the factory
the gland is LOOSE ENOUGH TO BE ROCKED BY HAND.
At first startup DO NOT tighten gland until pump
has run long enough for packing to expand from
absorption of pumpage. Thereafter, to adjust,
tighten nuts evenly one-quarter turn at a time
and adjust enough to reduce leakage - NO MORE
- a drop or two of the pumpage should normally
drip from the gland every few minutes (except,
of course, with mechanical seals or external scavenging
systems.) SHAFT SHOULD ALWAYS BE TURNABLE BY HAND.
LUBRICATE SHAFT, THROUGH FITTING PROVIDED,
WHILE PUMP IS UNDER OPERATING PRESSURE A MINIMUM
OF EVERY 8 HOURS DURING NORMAL OPERATION.
This applies for pumps with Zero Leak Packings
or Mechanical Seals to prevent forcing the lubricant
back through the packing or seal. For pumps with
Food Grade Packing, use only FDA approved lubricant.