Ex-pumps for application in chemical and process technology The micro annular gear pump mzr-2909 Ex covers the flow range 0.003 - 14 ml/min. The highly precise, low pulsation small volume dosage even of non-lubricating liquids or at high pressure, the compact design of this Ex-pump, the broad viscosity range and the small dimensions are unique features of this pump series. The pumps are applied in the field of chemical and process technology and are suitable for both continuous delivery and discrete dosage of watery solutions, solvents, oil and other viscous liquids. Accessories extending the operating parameters of the device are available. Advantages Ex-certification ATEX conform with EU Directive 2014/34/EU High dosage precision precision CV < 1 % at low volumes Compact dimensions length < 295 mm, including Ex-motor Broad viscosity range methanol, solvents, adhesives, grease, gel Long service life wear-resistant tungsten carbide Low pulsation delivery, low shear stress rotary...


Flow rate 0.003 - 14 ml/min
Smallest dosage volume 0.5µl
Displacement volume 3µl
Differential pressure range 0 – 5 bar (73 psi)
Maximum inlet pressure 5 bar (73 psi), (10 bar (145) *)
Ambient temperature range 0 ... +40 (+104 °F)°C
Liquid temperature range -5 ... +40 °C (+23 ... +104 °F)
Viscosity range 0.3 - 5,000 mPas
Precision CV < 1% (Coefficient of variation CV)
Ex-certification CE Ex II 2G c IIC T5 X
Place of installation Ex-area zone 1, 2
Wetted parts graphite-reinforced PTFE, 316L; static seals: FPM, optional: EPDM, FFPM
Motor 500 counts per turn, type HEDL 5540
Velocity range 1 - 4,700 rpm
Cable length 10m
Weight approx. 2,500 g
Remarks * with optional fluidic seal module, Customized solutions on request.

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