Air Operated Diaphragm Pumps

One of the most popular types of pumps found in use in chemical and beverage processing and production. Trebles stock a huge range of this type of positive-displacement pump. These diaphragm pumps can also be used for biotechnology and pharmaceutical purposes.

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Compact Designs

A Versatile & Popular Choice

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Continuous Flow

Regardless of Mass

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Variety of Materials

Allowing for Multiple Applications

The Suction Cycle of an Air Operated Diaphragm Pump:

Step 1: Suction
One diaphragm creates a suction action when being pulled back from the housing

Step 2: Discharge
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. Air operated diaphragm pumps can therefore be operated against a closed discharge valve with no adverse affect to the life of the diaphragms.

Trebles stock a large number of air operated diaphragm pumps, with our core range coming from the leading supplier of Tapflo. Across the range there are models designed to cope with a variety of applications including paint, adhesives, oils, ceramics or hazardous chemicals – suited to different applications and environments.

Due to the long life and serviceability of these pumps, Trebles also keeps extensive spares and accessories in stock.

Air Operated Diaphragm Pump
Tapflo Gif


Tapflo air operated diaphragm pumps are some of the most versatile pumps on the market today – with Trebles stocking a huge number of their product lines. Tapflo air operated diaphragm pumps can be used in variety of installations in numerous applications.

Thanks to the simple operating principle, with a compact and reliable design, Tapflo air operated diaphragm pumps meet the demands of heavy industrial duties.

Enquire About This Range

Key Benefits of Tapflo Air Operated Diaphragm Pumps


Run Dry Without Damage

Easy to use, no need of guarding device


Limited Components

Low down time & maintenance costs


Infinitely Variable Flow Control

Flexible & easy to adjust


Solid, Strong & Long Life Design

Low maintenance costs


Multiple Options for Installation

Self-Priming up to 5m From Dry Suction Pipe


Lubrication Free Air Distribution System

Saves the environment from pollution


No Electricity Needed

Explosion proof versions Ex-zone 1 available (ATEX group II, cat 2)


Air Operated

Runs against a closed pipe or closed valve without damage

Very fast and efficient service with extremely helpful sales team.

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