Blagdon Pump B06 Non-Metallic - Manual (Page 6)

HG-CF-880 Rev. Y - 17.09.12 Page 6
TROUBLE SHOOTING GUIDE
NOTE :- Check all solutions before dismantling the pump.
PROBLEM CAUSE SOLUTION
Pump will not start Air valve assembly malfunction/Seizure
Obstructed fluid line.
Obstructed diaphragm chamber.
Diaphragm failure causing fluid & excessive air to be
expelled through the exhaust.
Diaphragm seal failure.
Air valve system malfunction.
Air connected to exhaust. Check carrier for freedom of movement. -
Clean, oil & replace.
Clean line or increase line size.
Remove obstruction.
Replace diaphragm.
Replace shaft seals.
Check all seals in valve chest assembly.
Re-connect to air inlet.
Erratic flow Diaphragm failure on one side.
Valve ball not seating.
Suction leakage.
Diaphragm failure causing fluid & excessive air to be
expelled through the exhaust.
Diaphragm seal failure.
Air valve system malfunction. Replace diaphragm.
Check and remove obstruction.
Check and correct.
Replace diaphragm.
Replace shaft seals.
Check all seals in valve chest assembly.
Pump strokes but will not
discharge Excessive suction lift.
Suction line leakage.
Valve ball not seating correctly or damaged.
Suction line or strainer clogged.
Diaphragm failure. Shorten suction line.
Check and correct.
Check and remove obstruction / replace.
Clear.
Replace diaphragm.
Fluid discharged from air
exhaust Diaphragm Failure.
Loose frontplate. Replace diaphragm.
Re-Torque to manual specifications.
Intermittent stroke rate Over lubrication
Diaphragm shaft seal failure.
Air valve system malfunction.
Valve ball not seating / partially obstructed. Shut-down pump. Remove air connection
into pump & introduce a small quantity of de-
greasing agent into air valve and replace
line. Run pump until clear.
Replace seals.
Check all seals in valve chest assembly.
Clear obstruction.
Read these safety warnings and
instructions in this manual
completely, before installation and
start-up of the pump. It is the
responsibility of the purchaser to retain this
manual for reference. Failure to comply with the
recommendations stated in this manual will
damage the pump, and void factory warranty.
WARNING!
Before doing any maintenance on
the pump, be certain all pressure
is completely vented from the
pump, suction, discharge, piping, and all other
openings and connections. Be certain the air
supply is locked out or made non-operational, so
that it cannot be started while work is being done
on the pump. Be certain that approved eye
protection and protective clothing are worn all
times in the vicinity of the pump. Failure to
follow these recommendations may result in
serious injury or death.
WARNING! Before pump operation, inspect
all gasketed fasteners for loose-
ness caused by gasket creep. Re-
torque loose fasteners to prevent leakage. Follow
recommended torques stated in this manual.
CAUTION!
When used for toxic or
aggressive fluids, the pump
should always be flushed clean
prior to disassembly.
WARNING!
Take action to prevent static
sparking. Fire or explosion can
result, especially when handling
flammable liquids. The pump, piping, valves,
containers or other miscellaneous equipment
must be grounded.
WARNING!
Before maintenance or repair,
shut off the com-pressed air line,
bleed the pressure, and disconnect
the air line from the pump. The discharge line
may be pressurized and must be bled of its
pressure.
WARNING!
This pump is pressurized
internally with air pressure during
operation. Always make certain
that all bolting is in good condition and that all of
the correct bolting is reinstalled during assembly.
IMPORTANT!
In the event of diaphragm rupture,
pumped material may enter the air
end of the pump, and be dis-
charged into the atmosphere. If pumping a
product which is hazardous or toxic, the air
exhaust must be piped to an appropriate area for
safe disposition.
WARNING!
Airborne particles and loud noise
hazards. Wear ear and eye protec-
tion.
WARNING!
RECYCLING
Many
components of
BLAGDON air operated double
diaphragm pumps are made of
recyclable materials. We encourage pump users
to recycle worn out parts and pumps whenever
possible, after any hazardous pumped fluids are
thoroughly flushed.