Diaphragm pumps


Tapflo diaphragm pumps are some of the most versatile pumps on the market today. They can be used in variety of installations in numerous applications. Thanks to the simple operating principle, with a compact and reliable design, Tapflo diaphragm pumps meet the demands of heavy industrial duties.


Features & benefits

  • Run dry without damage.
  • Easy to use, no need of guarding device.
  • Infinitely variable flow control.
  • Flexible and easy to adjust.
  • Few components.
  • Low down time and mainenance costs.

Working principle

working principle.enThe Suction Cycle

  • Suction (1)
    One diaphragm creates a suction action when being pulled back from the housing.
  • Discharge (2)
    The other diaphragm simultaneously transmits the air pressure to the liquid in the housing, pushing it towards the discharge port.

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.

Key components

Three major components are especially vital for the function of the pump.


Long life diaphragms


diaphragm-cross-section.en 1

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.

Cutaway PTFE diaphragm
1) Reinforcement webbing 2) Light metal core
3) EPDM layer 4) PTFE layer


Ball check valves

The Tapflo pump is fitted with four check valves, making sure that the liquid is transferred in the right direction through the pump.
The valve is of ball valve type, the most simple and reliable valve design. It has a good sealing capability and is easy to keep clean and to replace if necessary.
The valve ball is available in EPDM, NBR (nitrile), PTFE, AISI 316, polyurethane and ceramic to suit any kind of liquid.



Download instruction manuals, technical and commercial brochures below. To open them you need Adobe Reader,download free here.


Tech info brochures

Tapflo product overview 8 pages english


Diaphragm pumps

Diaphragm pumps 40 pages catalogue english

Diaphragm pumps 40 pages catalogue polish

Diaphragm pumps 40 pages catalogue portugese

Systems and accessories brochure 12 pages english


Pulsation Dampeners

DT Pulsation dampener brochure 4 pages english



Hose pumps

PT hose pumps 8 pages brochure english

PTL hose pumps 8 pages brochure english


Business segments

Printing industry 8 pages brochure english

Surface treatment 8 pages brochure english

Hygienic Applications.pdf


Instruction manuals

AODD pumps user manual 1 - International languages

AODD pumps user manual 2 - Asian and European languages

AODD pumps user manual 3 - European languages


PE & PTFE diaphragm pumps

PE and PTFE diaphragm pumps IOM english

PE and PTFE diaphragm pumps IOM spanish

PE and PTFE diaphragm pumps IOM french

PE and PTFE diaphragm pumps IOM german

PE and PTFE diaphragm pumps IOM italian

PE and PTFE diaphragm pumps IOM swedish

PE and PTFE diaphragm pumps IOM polish

PE and PTFE diaphragm pumps IOM russian

TF PE and PTFE diaphragm pumps IOM english


Metal diaphragm pumps

Metal diaphragm pumps IOM english

Metal diaphragm pumps IOM spanish

Metal diaphragm pumps IOM french

Aluminium diaphragm pumps IOM german

Aluminium diaphragm pumps IOM italian

Metal diaphragm pumps IOM swedish

Metal diaphragm pumps IOM polish

Metal diaphragm pumps IOM russian


Sanitary diaphragm pumps

Sanitary diaphragm pumps IOM english

Sanitary diaphragm pumps IOM spanish

Sanitary diaphragm pumps IOM french

Sanitary diaphragm pumps IOM german

Sanitary diaphragm pumps IOM swedish

Sanitary diaphragm pumps IOM polish

Sanitary diaphragm pumps IOM russian


Aseptic EHEDG diaphragm pumps

EHEDG aseptic diaphragm pumps IOM english


Pharmaceutical diaphragm pumps


Pharmaceutical diaphragm pumps IOM english


Pulsation dampeners

DT Pulsation dampener IOM english

DT Pulsationdampener IOM german

Pulsation dampener IOM english

Pulsation dampener IOM french

Pulsation dampener IOM swedish

Pulsation dampener IOM russian


CT centrifugal pumps

CT centrifugal pumps IOM english

CT centrifugal pumps IOM french

CT centrifugal pumps IOM german.pdf



CTM magdrive pumps

CTM magdrive pumps IOM english


 CTV vertical pumps

CTV vertical pumps IOM english


PT hose pumps

PT hose pumps IOM english




water treatment
paint, print and varnish

About Tapflo. Tapflo Group is an independent, family owned, European manufacturer and global supplier of Air operated diaphragm pumps, centrifugal pumps and other industrial process equipment. Tapflo is represented by own sales offices in 28 countries and by independent distributors in more than 30 countries.