4 Description of the micro annular gear pump
Operating manual mzr-2521 and mzr-2921
14
Technical data subject to change without prior notice!
Last update: June 2019
4.2
Construction
The micro annular gear pump (figure 8) is composed of the pump head, the drive
unit and the connection cable with plug. The micro annular gear pump head is
available with two different fluid connection versions.
Slip fittings Ø 2 mm
Fluid connection manifold assembly
10-pole
connector
motor with
encoder
connection
cable
pump head
fluid connectors
motor with
encoder
connection
cable
10-pole
connector
pump head
fluid connectors
cap nut
figure 8
Layout of the micro annular gear pumps mzr-2521 and mzr-2921
4.3
Construction materials
Wetted parts
Construction material
Housing
stainless steel 316L (1.4404)
(optional: nickel silver), epoxy resin, adhesive
Fluid connectors
stainless steel 316L (1.4404)
Rotors
tungsten carbide (WC-Ni)
Bearing
ceramics and tungsten carbide (WC-Ni)
Dynamic sealing (shaft sealing)
graphite-reinforced PTFE,
spring: stainless steel 316L
Static sealing (O-rings)
FKM (fluoroelastomer),
optional EPDM, FFPM (perfluoroelastomer)
table 6
Construction materials of the wetted parts mzr-2521 and mzr-2921
Resistance of the construction materials to the delivered liquids should be verified
by the operator for each individual application. For non-lubricating liquids service
life of the pumps is shorter.