HomeMy WebLinkAbout1994 03 24 - Training CorrespondenceNOTES FROM FLYGT PUMP SEMINAR
RE: SUBMERSIBLE LIFT STATION PUMPS
MARCH 23, 1994
All motors have click -on temperature switches which will disengage
the pump if it overheats. It will shut off the pump for 15 to 20
minutes. You have to determine why the pump is overheating, such
as build-up of grease, impeller blockage, bad bearings (upper and
lower). You can hear the bearings if they have gone bad.
On a squirrel cage induction motor, electric is induced in the
motor causing the magnetic field. It is composed of steel
laminates. Standard voltages are 230 volts or 460 volts. Some are
208 volts. Most motors up to 20 HP are to be factory rewinds to
guarantee the same gage wire, same number of turns, Class F
insulation, click -on switch. You get a direct factory replacement.
Stator index pin is only for proper installation. 14.8 HP and
larger pumps will have a water cooling jacket. Less than 14.8 HP,
pumps will have air cooling. Using oil creates a drag and makes an
oil filled motor up to 15% less efficient than an air cooled motor.
Typically a single ball bearing assembly is used for upper bearings
for pumps less than 20 HP. Lower bearings are compressed. They
have a heat shrink seal. They have double row ball bearings which
accept thrust and radial loads. All ball bearings are packed with
lithium grease. The motor compartment should be dry, no oil. Oil
will cause the motor to fail.
There will be three inspection plugs. The motor inspection plug is
the upper one. There is an oil bath in the upper seal to lubricate
the upper shaft. A small amount of oil in the motor compartment is
acceptable. Upper seal failures will leak oil excessively. If you
have globs of grease coming out, you'll know it.
BE CAREFUL WHEN REMOVING THE PLUGS. THEY MAY BE UNDER
PRESSURE. USE A RAG OVER THE PLUG WHEN REMOVING THE
PLUGS.
Flygt uses dual tandem seals, upper and lower seals. The upper
seal is in the oil bath. A trace of water is acceptable in the oil
chamber. It is recommended to drain the oil out once a year. Do
not overfill, because the oil will get into the motor housing and
the pump will fail.
City of Sebastian
POST OFFICE BOX 780127 ❑ SEBASTIAN, FLORIDA 32978
TELEPHONE (407) 589-5330 ❑ FAX (407) 589-5570
*Pt .- E
1 0 R Sl -. D U Kf
DATE: March 7, 1994
TO: Ron, Tom, Skip, and Bob
FROM: Richard Votapka, Utilities Director )W
SUBJECT: Pump and Control Panel Training Seminar
On March 23. 1994, from 9:00 a. m. to 1:00 p.m.. Ellis K. Phelps, in
conjunction with SAS (Service After Sales), will host a training
seminar on Flygt pumps and control panels in the Sebastian city
Council chambers at City Hall. Since our system has six Flygt pump
lift stations, the seminar should be very beneficial to us. Let me
know who will be able to attend the seminar. I would like all of
you to be present if possible. although I realize someone will have -
to mind the plants. Whatever you work out among yourselves will be
fine by me as long as everyone has the opportunity to spend some
time at the session.