The Suction Cycle
During each cycle the air pressure on the back of the discharging diaphragm is equal to the head pressure on the liquid side. Tapflo diaphragm pumps can therefore be operated against a closed discharge valve with no adverse affect to the life of the diaphragms.
Long Life Diaphragms
The two diaphragms are doing the work to prime and push the liquid through the pump system. Tapflo diaphragms are of sandwich compound construction, superior for continuous heavy duty service.
The solution with an integrated metal core, provides a completely smooth surface in contact with the liquid, without any nuts or washers. This results in no leak through and a diaphragm which is easy to keep clean.
The diaphragm is available in PTFE (food grade), EPDM, white EPDM (food grade), NBR and FKM (FKM on certain models only).
Pollution free air valve
The air valve is the driving heart of the pump, distributing the compressed air to the chambers behind the diaphragms.
It is made for maintenance free duty with no lube air, thanks to the ingenious sealing system. It will not only save your money for lubrication, it will also save your environment from pollution.
The Tapflo air valve has no deadlock position – the pump will always start automatically when air is supplied to the pump. The valve body is made from brass or optional stainless steel AISI 316.