TapFlo Metal Series, Original Instruction

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3. MAINTENANCE
IOM manual Tapflo Metal Series
18
3.4. Location of faults
PROBLEM POSSIBLE FAULT POSSIBLE SOLUTION
The pump does not run
The air pressure is to low Increase air pressure via a filter-regulator
The air connection is blocked Check / clean air supply connection
Muffler is blocked Check / clean / replace muffler
Air valve is defective Clean / replace complete air valve
Dirt in the pump chamber Remove debris from the chambers
Diaphragm breakdown Replace diaphragm
The suction is bad
Suction connection is not tight Tighten the suction line
Suction connection is blocked Clean suction line
Muffler is blocked Check / clean / replace muffler
Valve balls are blocked or damaged Check dimensions and shape of valve balls
Valve seats are worn
Pump starts with high pressure
Air in suction / discharge line
Dry suction against discharge pressure Check dimensions and shape of valve seats
Start the pump slowly (see chapter 2.2)
Vent suction / discharge line
Wet the pump / start without discharge pressure
The pump runs irregular
Valve balls are blocked Check dimensions and shape of valve balls
Sealing in centre block is worn
Air valve is defective Replace sealing
Clean / replace air valve
Diaphragm breakdown
Valve seats are worn
Icing on the muffler Replace diaphragm
Check dimensions and shape of valve seats
Improve air quality (see chapters 1.7.1 and 2.2.2)
Bad flow/pressure
Pressure fall in air supply
Pressure losses on suction side
Air supply / air valve leaking Increase air pressure via a filter-regulator
Check/change installation on suction side
Check / repair / replace air supply / air valve
Suction or air connection blocked Check / clean air supply / suction connection
Muffler is blocked Check / clean / replace muffler
Valve ball worn or broken
Valve seats are worn Check dimensions and shape of valve balls
Check dimensions and shape of valve seats
Air in liquid Seal suction line; check / refill container
Diaphragm breakdown
Icing on the muffler Check / replace diaphragms
Improve air quality (see chapters 1.7.1 and 2.2.2)
Liquid leaks from the pump
Screws on the housing not properly
tightened
O-rings on manifolds damaged
Damaged diaphragm
Tension / stress form the installation Check tightening torques of the screws
Replace O-rings
Check / replace diaphragms
Adjust installation, eliminate stress, when using a
dampener provide separate support for it (see
dampener IOM manual).
Liquid comes out of the
muffler Diaphragm breakdown Replace diaphragm
Diaphragm breakdown
Wrong selection of material
Too high pressure in the installation
Long periods of dry running
Too high pressure on suction side Contact us for information on material selection
Use air treatment system for protection
When dry, run pump slowly (see chapter 2.2)
Make sure there is pressure balance between the
air and liquid side of the diaphragm