Air Operated Diaphragm Pumps (MPF series)
Air operated diaphragm pumps of the MPF series transfer liquids by means of two air-driven diaphragms - gently, dry-run safe and dry self-priming. Available in 9 sizes (MPF 7 to MPF 80) from 7 to 1050 l/min, in PP, PVDF, aluminium and stainless steel.
Air Operated Diaphragm Pumps of the MPF Series: A Versatile Solution for Demanding Transfer Tasks
Air operated diaphragm pumps of the MPF series have established themselves as a reliable and versatile solution for transferring a wide variety of liquids. They are ideally suited to handling abrasive media with a high solids content or elevated viscosity. These dry-run resistant pumps can also be used in processes where the pump has to be emptied completely. Further fields of application include processes in which sensitive liquids must be transferred gently.
Operating Principle
The central elements of an air operated diaphragm pump are two diaphragms moved by compressed air. These diaphragms are connected by a rod, which in turn is moved by an air valve in the centre of the pump. The pumping process takes place in two phases, running in opposite directions on either side of the pump:
- Suction phase: One diaphragm is pushed outwards by compressed air, creating a vacuum on the fluid side. This draws the liquid through the inlet valve into the pressure chamber.
- Discharge phase: At the same time, the second diaphragm moves inwards and forces the liquid out of the pump outlet through the discharge valve.
This process is repeated continuously, with the diaphragms working alternately to produce a steady, slightly pulsating flow.
Materials
Casing materials: polypropylene (PP), polyvinylidene fluoride (PVDF), stainless steel, aluminium.
Diaphragm materials: NBR, Santoprene, Keyflex, EPDM, FKM, PTFE.
The free combination of casing and diaphragm material makes these pumps suitable for almost any application. We will gladly configure the pump to meet your requirements.
Fields of Application
- Chemical industry: handling of aggressive and corrosive media
- Food industry: gentle transfer of sensitive liquids
- Pharmaceuticals and cosmetics: handling of sensitive hygienic products
- Wastewater treatment: handling and treatment of sludges and suspensions
- Shipping: loading and unloading of ballast tanks
- Paint and coatings production: processing of viscous and abrasive media
- Electroplating: transfer of acids and alkalis
| Product | MPF 7 | MPF 10 | MPF 15K | MPF 15 | MPF 25K | MPF 25 | MPF 32 | MPF 40 | MPF 50 | MPF 80 |
|---|---|---|---|---|---|---|---|---|---|---|
| Female thread connection (ISO flange optional) | G1/4" (DN7) | G3/8" (DN10) | G1/2" (DN15) | G1/2" (DN15) | G1" (DN25) | G1" (DN25) | G1¼" (DN32) | G1½" (DN40) | G2" (DN50) | G2" (DN80) |
| Flow rate (max.) | 7 l/min | 20 l/min | 35 l/min | 65 l/min | 120 l/min | 170 l/min | 250 l/min | 380 l/min | 700 l/min | 1050 l/min |
| Head (max.) | 60 mWC | 70 mWC | 70 mWC | 80 mWC | 80 mWC | 80 mWC | 80 mWC | 80 mWC | 80 mWC | 80 mWC |
| Temperature PP/PVDF/AL/SS (max.) | 60/90/100/100 °C | |||||||||
| Air supply pressure (min.) | 2 bar | |||||||||
| Air supply pressure (max.) | 6 bar | 7 bar | 7 bar | 8 bar | 8 bar | 8 bar | 8 bar | 8 bar | 8 bar | 8 bar |
| Suction lift (dry) | 3 m | 5 m | 5 m | 5 m | 5 m | 5 m | 5 m | 5 m | 5 m | 5 m |
| Suction lift (wet) | 9.8 m | |||||||||
| Particle size (max.) | 2 mm | 2.5 mm | 3 mm | 3.5 mm | 4 mm | 7.5 mm | 7.5 mm | 8 mm | 8.5 mm | 9.8 mm |
| Air supply inlet connection | Ø4 mm | Ø6 mm | Ø6 mm | G1/4" | G3/8" | G1/2" | G1/2" | G1/2" | G3/4" | G3/4" |
| Casing materials | PP, PVDF, aluminium, stainless steel | |||||||||
| Diaphragm materials | NBR, SANTOPRENE, KEYFLEX, EPDM, FKM, PTFE | |||||||||
- No dead centre: smooth transition between suction and discharge phase
- Versatile: abrasive, solids-laden, viscous and corrosive media
- Dry-run safe without sustaining damage
- Self-priming from depths of up to 5 m (dry)
- Suitable for ATEX areas thanks to the pneumatic drive
- Flow rate easily controlled via the air pressure
- Robust, economical to purchase and maintain
- Not location-bound, easy to dismantle and transport
- Media-separated: complete separation of drive and pumped medium
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Frequently Asked Questions about Air Operated Diaphragm Pumps
What are air operated diaphragm pumps particularly suited to?
For abrasive, solids-laden, viscous or shear-sensitive media that would be damaged by a centrifugal pump – as well as for applications requiring dry-run safety or self-priming capability.
Are air operated diaphragm pumps suitable for ATEX areas?
Yes. Thanks to the purely pneumatic drive and the absence of electrical components in the fluid area, they are suitable for potentially explosive atmospheres.
Which materials are available?
Casings in PP, PVDF, aluminium or stainless steel, combinable with various diaphragm, valve ball and seal materials – so the pump can be matched exactly to the medium being handled.