Operating and Assembly Instructions
Dispenser RD-EC26 / 27
Version 1.2
7.2 Technical data
7.3 Materials used
Dispenser type 4RD6 3RD8 3RD10 3RD12
Dosing volume, approx. ml/rev. 0.12 0.35 1.1 1.7
Minimum metering volume ml *1 0.005 0.02 0.05 0.1
Accuracy ml +, absolute *1 0.0006 0.002 0.0055 0.011
Admission pressure, max. bar (inlet
pressure) *2 *6
20
Metering pressure *3 *6, max. bar 30
Metering pressure *4 *6, max. bar 20
Self-sealing *5 (see section 1.1) approx. 2 bar
Ambient operating conditions +10°to+ 40° Celsius (Ta), air pressure 1 bar
Medium temperature ° Celsius -20 to +80
Storage conditions / storage temperature °
Celsius
dry and dust-free / -10 to +40
Weight without drive, approx. grams 1020 1030 1220 1440
Necessary drive torque, Nm 1-3 2-4 3-5
Maximum speed, rpm 125
Maximum permissible torque, Nm 8
*1 Reference medium approx. 1000 mpas. at 20°C
*2 For both pumping directions
*3 Preferred pumping direction: from 1A to 1B (anti-clockwise rotating dispenser, Fig. 14)
*4 Opposite to preferred pumping direction: from 1B to 1A (anti-clockwise rotating dispenser,
Fig. 14)
*5 Max. dosing pressure and self-sealing decrease as viscosity decreases. Consult
manufacturer.
*6 Maximum value, depending on the medium
There is FDA approval for the non-stick coating.
Components in contact with product
Non-stick coating in inner dispenser housing PFA
Housing, screws, washers, stator housing, bearings Stainless steel
Sealing washers PTFE
O-rings Viton ®*
Rotary shaft seal (L), high pressure rotary shaft seal PTFE 40% GF
Rotor coating Hard chromium plated
Rubberised flex-shaft VisChem
Stator, see page 24
* Viton ® is a DuPont brand
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