All about your flow


The compact, smooth and simple design is common for this series. Materials available are aluminium, cast iron, stainless steel and PTFE coated aluminium. You will discover the ingenious simplicity when you maintain the pump. We use approximately 70% fewer parts than our competitors use to build similar sized pumps.

Aluminium and cast iron pumps

For transfer of pH-neutral fluids, both thin, thick, solid laden or abrasive. The aluminium and cast iron pumps are found in most fields; work shop and paint industries, purifying plants etc., to mention only a few.

AISI 316 stainless steel pumps

Made in lost wax cast method, ensuring great accuracy and finish. The stainless steel pumps combine great mechanical strength with good chemical features. AISI 316 is resistant to aggressive liquids like nitric acid and sodium hydroxide. The centre unit, which is not in contact with liquid, is made from corrosive resistant polypropylene (PP) as standard (other materials upon request).

ATEX certified pumps

All metal pumps are available in explosion proof ATEX marked version. They are supplied with earth connection and conductive materials; conductive centre section (on AISI 316 pump), diaphragms in PTFE (conductive back) or EPDM (conductive).



Metal series diaphragm Pumps

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1. Flexible installations

The connections may be rotated 180°. Simply turn the connections to fit your piping system. Threaded BSP orNPT connections is standard. Twin connections are also available.

2. Powerful valveseats

The valve seat is under constant stress from the movement of the valve ball. To obtain the best wear resistant, the integrated seat is made from AISI 316 stainless steel.

3. Low air consumption

The air distribution system is designed with shortest possible air distribution ways. This eliminates ”dead spaces”, resulting in high effiencey and low air consumption.


Metal series diaphragm Pumps

Metal drum pumps

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The Tapflo drum pump is ideal for mobile use and is available in aluminium or stainless steel AISI 316.

It is fit with an ergonomic designed handle in stainless steel AISI 316L. The drum tube is delivered in any length up to 2 m.

The Tapflo diaphragm drum pump has many advantages compared with conventional drum pumps as stated above.

Metal drum pump range
Size Capacity (l/min   –   gallon)
*TXD25  25 lit/min    –     1/2”
TXD70 70 lit/min    -    3/4”
TXD120 120 lit/min    –     1”

*TXD25 is available in aluminium only


Metal twin pumps

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Tapflo Metal series pumps may be fitted with double in/outlet to achieve ”two pumps in one” for blending, mixing or recirculation of liquids. The liquid in one pump chamber is separated from the other one.

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Twin pump installation for printing application - transfer and cir-culation of printing ink

PTFE coated pumps

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Aluminium pump include all wetted parts coated with non stick PTFE, is equipped with stainless steel in/outlet ports.

The model was developed for the printing industry where a low price alternative of the PE/PTFE pumps was required but aluminium not chemically resistant. It can be used for all sorts of applications where slightly acidous or alkaline liquids need to be transferred. 

However, in applications with highly aggressive chemicals, we still recommend our full plastic PE & PTFE series pumps.



Metal series diaphragm Pumps









The performance curves are based on water at 20°C. Other circumstances might change the performance. See below how the capacity will change at different viscosities and suction lifts. These curves are valid for all metal pumps.

Example (see the red line): A flow of 10 liter/minute is desired. The discharge head is calculated to 20 mWC. We choose a T25. It requires an air pressure of 4 bar and will consume approximately 0.10 Nm3 air per minute.



Metal series diaphragm Pumps

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Metal series diaphragm Pumps

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Metal series diaphragm Pumps

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Metal series diaphragm Pumps


Tapflo AOD pumps

Metal diaphragm pumps IOM


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.