Loctite 2265279, Operation Manual

Operating Manual  

- Page 7 - 

2.2 Theory of Operations  

The EQ PU20 Digital Peristaltic Dispenser transfers low viscosity liquids by pressure displacement 

applied by a turning rotor against a tube carrying the material. Usually these pumps are chosen 

because the liquids are hazardous or difficult to work with and it is advisable to limit operator 

contact. Another reason is that peristaltic pumps are air free. 

Dispense outputs can be timed from 0.01 - 99.99 seconds with flow speeds from 0.01-6 ml/min 

using PTFE tubing. The pump is bi-directional allowing suck-back after dispense to prevent 

dripping of the fluid. When dispensing UV adhesives use only black tubing. This avoids curing of 

the adhesive in the tube. 

The amount of product dispensed is controlled by: 

Dispensing time 

Feedline size 

Motor speed 

Needle size 

Various sizes of PTFE tubes, the corresponding applicator nozzles and dispensing needles are 

available, see section 5.1 

3  Technical Data 

Power supply 

100-240 V AC, 50/60 Hz 

Dispensing time range 

0.01 - 99.99 sec 

Rotor speed 

Up to max. 120 rpm (CW/CCW) 

Flow rate 

0.01 - 6 ml/minute with feedline 

Direction of rotation of the drive 

Clockwise (CW) - Counterclockwise (CCW) 

Motor Repeatability 

+/-5% 

Timer Repeatability 

+/-10ms 

Operating Temperature 

+5°C - +50°C (+41°F -122°F) 

Relative Humidity 

Max. 80% 

Weight 

~3.5 kg