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Overview:
INSTRUCTION BULLETIN
Flomax 30 - Self Priming Single Seal Pumpak
®
These instructions pertain to single seal Flomax 30
pump end installation and assembly. Your Flomax
pump may have included a driver such as closecoupled electric motor, or engine that will hereafter
be referred to as the driver.
PUMPAK ASSEMBLY: (pump end suitable for
mounting to various drivers).
1. Loosen the drive sleeve clamp.
2. Slide the pump onto the driver by hand. This
should not require extreme force.
3. Install and tighten fasteners (4 screws) into the
pump adaptor securing the driver.
4. Tighten the drive sleeve clamp nuts to 20 - 26 ftlbs.
5. Remove the metal shim strap that spaces the
impeller by pulling it out of the discharge.
6. Rotate the shaft to ensure that the pump rotates
freely before putting the pump into service.
INSTALLATION:
Optimum performance can be attained by placing the
pump as close to the liquid source as possible.
Secure the pump by mounting it to a foundation or
base plate.
All pipe connections must be sealed with adequate
thread sealant. A small air leak in the suction line
will affect priming performance. If a throttling valve
is used to adjust the flow rate, it should be mounted
to the discharge piping only - never in the suction.
A large low restriction de-watering type strainer must
be used whenever there are solids present in the
liquid source.
OPERATION:
Fill the pump with liquid prior to starting through a
fitting on the discharge piping. The pump housing
should be completely full. If the pump has a
discharge valve it must be fully open to expel air
during priming at initial start-up. Long horizontal
suction lines require extra time to prime, 2 additional
minutes for every 10 feet of horizontal run.
Start the pump driver. The pump will prime the
suction hose and establish flow in about 5 minutes,
more or less, depending upon the lift distance and
length of horizontal run. After prime, the pump will
perform to its full flow capability.
After the initial prime, the pump will retain liquid in
the housing and may not need to be refilled after
shutdown and restart even if the suction pipe has air
in it.
Hose or pipe can be used on the suction and
discharge. The suction line must not be reduced in
size. If hose is used, reinforced non-collapsible type
is recommended. The discharge line must be rated to
the maximum pressure developed by the pump.
Avoid kinks in the hose and unnecessary restrictions
that may affect pump performance.
WWW. MPPUMPS. COM
Form 3070-A
11/03
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REBUILD:
Use the exploded parts view with these instructions
and note recommended replacement parts for the
rebuild process.
1. Disconnect and removed the pump end from the
driver.
2. Remove and replace the flapper assembly and
discharge gasket. Tighten the inlet and discharge
flange fasteners to 24 ft-lbs.
3. Remove 6 nuts from the adaptor and disassemble
the rotating assembly form the housing.
4. Inspect the wearplate for abrasive wear and
replace if necessary using new screws, gaskets
and acorn nuts.
5. Remove the seal seats from the adaptors and
discard.
6. Impellers are threaded onto a drive sleeve and
fastened with a jam nut.
7. Inspect the impeller for abrasive wear at the
edges of the machined surfaces. If they are not
well defined the impeller should be replaced.
6. Place housing gasket over the studs and install
the driver adaptor onto the pump assembly to
compress the seal spring. Tighten 6 nuts with
lockwashers to 28 ft-lbs. with a crosswise
pattern.
7. Slide the drive sleeve clamp assembly on the
sleeve.
8. Pull the clamp assembly and sleeve back out of
the pump and slide a shim inside the pump
discharge between the wearplate and impeller
vanes. Shim material thickness should be .02.03 inches.
.
The pump can now be installed to the driver as a
pumpak.
REASSEMBLE:
1. Using a water-soluble lubricant, lubricate the
seal seat o-rings and seal housing bores. Install
new seal seats into the adaptors with the polished
sides of the seat up. Install by hand using your
thumbs to squarely locate the seats against the
shoulder of the adaptors. Wipe the seal faces dry
with a rag.
2. Place the impeller inside the pump housing.
3. Install the housing gasket over the housing studs
and position it on the housing gasket face.
4. Using a water-soluble lubricant, lubricate the
impeller sleeve and the seal rotary bellows inner
diameters.
5. Install the seal rotary (carbon face) tail first over
the sleeve to make contact with the spring.
WWW. MPPUMPS. COM
Form 3070-A
11/03
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