Tapflo Sanitry Double Diaphragm pump failing?
Tapflo Sanitry Double Diaphragm pump failing?
(OP)
Hi,
Hopefully someone can assist me with a problem we have a basic pump system installed in a bakery, pumping (when required) milk at 2 degrees celsius (Tapflo T80 pump is installed in the fridge with the milk containers) operating at around 5-6 bar.
The suction / discharge lines are 35mm and we have this system in numerous places without any hitch.
This one bakery however is giving us a lot of problems with the pump failing to start on demand. We have the pump linked to a dosing valve (Gemu). Most of the time the pump functions ok and then others not at all. I have serviced the pump with a new set of internals i.e air valve, diaphragsm, balls etc but still no joy.
The pump is less than a year old and is probably used to pump around 100 litres of milk per day in 1.5 litre doses, so is used relatively little.
It is kept clean and the air supply is fitted with a dryer but occasionally the pump just fails to operate. After ten mins or so the pump normally functions again.
The pump is kept pressurised at all times to allow for accurate dosing through a meter.
Any ideas what the problem may be??
Like I say we have these systems elsewhere more or less identical running problem free.
thanks in advance
Hopefully someone can assist me with a problem we have a basic pump system installed in a bakery, pumping (when required) milk at 2 degrees celsius (Tapflo T80 pump is installed in the fridge with the milk containers) operating at around 5-6 bar.
The suction / discharge lines are 35mm and we have this system in numerous places without any hitch.
This one bakery however is giving us a lot of problems with the pump failing to start on demand. We have the pump linked to a dosing valve (Gemu). Most of the time the pump functions ok and then others not at all. I have serviced the pump with a new set of internals i.e air valve, diaphragsm, balls etc but still no joy.
The pump is less than a year old and is probably used to pump around 100 litres of milk per day in 1.5 litre doses, so is used relatively little.
It is kept clean and the air supply is fitted with a dryer but occasionally the pump just fails to operate. After ten mins or so the pump normally functions again.
The pump is kept pressurised at all times to allow for accurate dosing through a meter.
Any ideas what the problem may be??
Like I say we have these systems elsewhere more or less identical running problem free.
thanks in advance





RE: Tapflo Sanitry Double Diaphragm pump failing?
RE: Tapflo Sanitry Double Diaphragm pump failing?
2, possibly 'air' trapped inside the pump chamber, is the pump fitted with a vent-off..?
3, re-prime the pump and vent any trapped air.
RE: Tapflo Sanitry Double Diaphragm pump failing?
RE: Tapflo Sanitry Double Diaphragm pump failing?
in response to your points,
firstly the setup is exactly the same as we have in approx 10 sites (no problems in these sites),
The compressor has a dryer attached to it, its not a particularly big compressor but it doesnt really need to be for the job at hand, I cant see any water coming from the airline at all, (thats not to say it is dry though but how would I tell?)
The pump has no motor, is a pneumatically operated double diaphragm pump made by Tapflo
The fridge has been raised to five degrees to overcome any possible freezing issues but the problem still arises
the pump is a self priming pump, and it is kept under pressure at all times so there should be no trapped air theoretically anyway.
The pump is less than a year old, just and we have just changed everything inside of it for new but still no success.
Am getting baffled now!
thanks
RE: Tapflo Sanitry Double Diaphragm pump failing?
RE: Tapflo Sanitry Double Diaphragm pump failing?
I agree it probably is freezing although I'd love to know if there was a way I could determine if the drier was doing its job.
I really dont know the type of drier, but I am pretty sure it is the refrigeration type
RE: Tapflo Sanitry Double Diaphragm pump failing?
RE: Tapflo Sanitry Double Diaphragm pump failing?
RE: Tapflo Sanitry Double Diaphragm pump failing?
eg it doesnt like to be throttled fully (a closed discharge)
does the discharge line has a over pressure valve installed?
first thing I can think of would be jammed suction /discharge ports (ball type of valves,with ball getting stuck into its port)