10
4 Installation
4.3 Selection of the Required Dispensing Needle
For each product and corresponding application of the dispenser, various dispensing
needle types and sizes are available:
– Conical dispensing needles of polyethylene for viscous products and large
dispensed quantities.
– Stainless steel needles for thin fluids and UV curing products (especially suitable
for spot applications).
– Flexible dispensing needles of polypropylene (especially for dispensing on
damageable surfaces).
– PTFE-lined stainless steel needles (especially for fast curing products).
As a matter of principle, spitting is possible with each LOCTITE dispensing needle.
An exact spitting is only possible with the conical dispensing needles.
With same dispensing quantity certain correlation determines the selection of the
needle.
The table below shows these correlation.
Dispensing Needle
Pressure Loss
along the Needle
Risk of Dripping
Spitting
Conical
dispensing
needles PE
97221 – 97224
small small
possible
Stainless Steel
needle SSS
97225 - 97228
Flexible
dispensing
needles PP
97229 – 97232
high
high
not possible
Important for spitting applications:
- conical needles are recommended
- smallest dispense volume is about 3
µ
l
- inner needle diameter must be adapted to the product viscosity
Summary of Contents for VoluDrop UV 97650
Page 1: ...Operating Manual VoluDrop Dispenser UV 97650 ...
Page 2: ...2 Contents English 3 16 ...
Page 17: ...17 8964739 03 2003 ...
