Ex-pump for application in chemical and process technology The mzr-11557 Ex micro annular gear pump of the hermetic and chemically inert series is, considering its almost universal suitability for aggressive and corrosive media, a revolution in the pump technology. Driven by a explosion-proof three-phase AC motor the pump covers the flow range from 58 ml/min to 1152 ml/min. Its rotors and functional elements being made of ceramics, the pump shows the highest chemical resistance and an outstanding resistance to wear. Thanks to the use of ceramics as bearing and shaft material, a magnetic coupling, and case components made out of alloy C22 (DIN 2.4602), this pump will take up any challenge in the chemical industry applications. Advantages Ex-certification ATEX conform with EU directive 94/9/EEC High dosage precision precision CV < 1 % at low volumes Long service life wear-resistant tungsten carbide Broad viscosity range water, solvents, adhesives, grease, gel Compact...


Flow rate 58 - 1152 (29 - 576*) ml/min
Displacement volume 192µl
Maximum system pressure 60 bar (870 psi) 200 bar * (2900 psi *) (inlet pressure + differential pressure)
Differential pressure range 0 – 40 bar (580 psi)
Ambient temperature range -20 ... +40 °C (-4 ... +104 °F), -55 ... +60 °C * (-67 ... +140 °F) *°C
Liquid temperature range -5 ... +60 °C (+23 ... +140 °F)
Viscosity range 0.3 - 1,000 mPas
Ex-certification CE Ex II 2G c IIB T3
Place of installation Ex-area zone 1, 2
Precision CV < 1% (Coefficient of variation CV)
Velocity range 300 - 6000 (150 - 3000*) rpm
Fluid connection 3/8" NPT internal thread, lateral
Wetted parts stainless steel 316L; seals FFPM (Kalrez® Spectrum™ 6375), optional: FPM, EPDM; shaft sintered silic
Motor three-phase AC motor, IEC-Size 063, 2 poles, IP 55, rated voltage 240/400 V, frequency 50 Hz, 250 W
Temperature protection PTC-resistor, 6 pieces
Dimensions (L x W x H) 344 x 120 x 227 mm
Weight approx. 25,000 g
Remarks * depending on accessories, Customized solutions on request.

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