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Linear Diaphragm Pumps for Air and Gas

Boxer is the European distributor for the AirMac linear diaphragm pumps from Diann Bao. The portfolio extends from a flow of 5 l/min to 400 l/min across 12 platforms offering both OEM components and pumps complete with a robust aluminium housing, power cord, rubber feet and integrated inlet filter. More series will be added to this overview shortly.

Note: for customers outside of Europe, enquiries will be passed directly to Diann Bao. Alternatively, use the link below.

DB5(S)

› Flow to 10 l/min    
› Pressure range -170 to +170 mbar
› OEM design with inlet and outlet ports
› Lightweight and compact design
› Low sound level

DM5S

› Flow to 10 l/min
› Pressure range -170 to +200 mbar
› OEM design with inlet and outlet ports
› Lightweight and Compact design
› Exceptionally low sound level

DB10S

› Flow to 13 l/min
› Pressure range -210 to +220 mbar
› OEM design with inlet and outlet ports
› Lightweight and compact design
› Low sound level

DM10S

› Flow to 14 l/min
› Pressure range -210 to +270 mbar
› OEM design with inlet and outlet ports
› Lightweight and compact design
› Exceptionally low sound level

DBM30B

› Flow to 58 l/min    
› Pressure range -300 to +310 mbar
› Compact design
› Low sound and vibration
› Long life linear drive

DBM40B

› Flow to 67 l/min    
› Pressure range -325 to +375 mbar
› Compact design
› Low sound and vibration
› Long life linear drive

DT60

› Flow to 75 l/min    
› Pressure range 100 to 250 mbar
› Low energy / high efficiency
› Compact Design
› Long life / fully serviceable

DT80

› Flow to 100 l/min    
› Pressure range 100 to 250 mbar
› Low energy / high efficiency
› Compact design
› Long life / fully serviceable

DBMX80

› Flow to 115 l/min
› Pressure range 100 to 250 mbar
› Strong stable performance
› Robust design
› Long life / fully serviceable

DBMX100

› Flow to 130 l/min    
› Pressure range 100 to 250 mbar
› Strong stable performance
› Robust design
› Long life / fully serviceable

DBMX120

› Flow to 155 l/min    
› Pressure range 100 to 250 mbar
› Strong stable performance
› Robust design
› Long life / fully serviceable

DBMX150

› Flow to 220 l/min    
› Pressure range 100 to 250 mbar
› Single drive compact design
› Strong stable performance
› Long life / fully serviceable

DMX200

› Flow to 235 l/min    
› Pressure range 100 to 250 mbar
› Single drive compact design
› Strong stable performance
› Long life / fully serviceable

DBMX250

› Flow to 360 l/min
› Pressure range 100 to 250 mbar
› Dual drive design
› Low energy / high efficiency
› Long life / fully serviceable

DBMX300

› Flow to 400 l/min
› Pressure range 100 to 250 mbar
› Dual drive design
› Low energy / high efficiency
› Long life / fully serviceable

Download the complete product overview pdf here:

Linear Diaphragm pumps

A linear diaphragm pump has the unique feature that the drive / motor itself has no wearing parts. Linear diaphragm pumps work on the principle of a magnetic shuttle held by the diaphragms of opposed heads. On either side of the shuttle is an electromagnetic which is enegised by an alternating voltage oscillating at 50 or 60 Hz. The magnetic shuttle moves linearly between the poles of the electromagnet attempting to close the magnetic field at the same frequency of the applied voltage. This motion is used to move the diaphragm inside the linear diaphragm pump. With no wearing drive parts the life of the pump is determined by life of the diaphragm. A second feature of linear pumps is that the stroke is not constant. It is greatest at open flow and reduces with increasing pressure or vacuum. Compared to a constant stroke pump, for example a DC motor driven diaphragm pump, the flow curve is steeper since the compression ratio decreases with increasing pressure. Typical maximum differential pressures of a linear diaphragm pump is ± 500 mbar. Low working pressures and a zero-wear drive combine to provide a linear diaphragm pump with its greatest advantage: extremely long life. The larger pumps will typically run over 20,000 hours, whilst the small models will run well above this level. Service kits are available which comprise of new diaphragm, head and valves. Essentially once a service is complete, the linear diaphragm pump, from a life perspective, is new.

⇒ Linear Diaphragm Pump Exploded View (.pdf)

…. the Parameters for Aeration

A very popular application for a linear diaphragm pump is the aeration of water. Typically pressures are low and run times are long, if not continuous. The features of linear diaphragm pumps can therefore be fully utilised. This can be for aquatics and pond aeration but also for sewage aeration in decentralised sewage treatment. In Europe approximately 90% of households are connected to municipal sewage systems. The remaining, typically in rural locations rely on a decentralized sewage treatment and sewage aeration systems. This can be one sewage treatment system per household or one per cluster of households. European law dictates the quality of any discharge entering the ground water. Often this can only be achieved with a sewage treatment system. Flow requirement are typically 60 to 120 l/min at 150 to 200 mbar. Linear diaphragm pumps are at the heart of a sewage aeration system and provide not only the air for aeration but also for air lifters to move liquids from chamber to chamber within the sewage treatment system. With ever increasing energy costs it is also important for the end user of sewage aeration and pond aeration systems that the linear diaphragm pump runs efficiently. The higher efficiency linear diaphragm pumps run at 0.6 to 0.7 watts per litre of air. Since a sewage aeration pump can run between 30 % and 100% of the time, energy consumption is significant contributor to the overall costs. 

Beyond sewage aeration for decentralised sewage treatment and pond aeration the small linear diaphragm pumps are used in medical, environmental and other industrial applications. For medical they can be found in air mattress, compression therapy and massage systems. For environmental systems a linear diaphragm pump is an excellent choice for continuous air and gas monitoring due to life exceeding many years of operation. Industrial applications include fuel cell systems requiring high efficiency or indeed linear diaphragm pumps can be found as vacuum or pressure generators, or part of cooling and drying systems.

.... the Range

The Airmac range of linear diaphragm pumps from Diann Bao cover a range from small OEM pumps starting at 5 l/min, through the mid-range pumps of 60 to 120 l/m complete with robust housing and power cord, typically for sewage treatment in of decentralised sewage systems and pond aeration. Models include the DT60, DBMX80 and DBMX120. The models extend to 400 l/min for the needs higher flow sewage aeration systems, for example for rural hotels or clusters of households.

⇒ Airmac Linear Diaphragm Pump Catalogue (.pdf)

Linear Diaphram Pump Maintenance Video

Visit the AirMac website directly: www.airmac.com.tw

Boxer Pumps
Boxer GmbH · For gas & liquids · 20 Belsize Avenue · London NW3 4AU
Phone: +44 (0)20 7794 4080 · Fax: +44 (0)20 7431 1426 · mail@boxerpumps.com · boxerpumps.com