9
9)
JET SPRAY ASSEMBLY
The stainless steel spray assembly is a
double fluid nozzle where the inner nozzle
develops the liquid jet and the outer the
compressed air jet. The compressed air
atomises the liquid as it emerges from the
jet to form the required fine spray.
The jet and outer nozzle can be unscrewed
from the main assembly for cleaning as
required.
Always be careful not to damage the inner
jet nozzle (which is only 0.5mm
∅
thin wall
stainless steel) as any slight misalignment
will affect the efficiency of the spray.
The jet assembly is easy to disassemble by
unscrewing the knurled rings.
Instructions for testing the jet spray
assembly outside the main chamber
Before fitting the jet into the top chamber it
is useful to operate it outside, with water, to
see the actual spray formation. First
connect the silicon tubing to the pump head
by the following procedure.
De-blocker inlet (A)
Sample Inlet (B)
Atomising air inlet (C )
Open the hinged plastic cover of the pump and leaving sufficient tube to connect to the jet when it is
in the top chamber, insert the tube rotate pump head by hand, until positioned under the pump
rollers.
Open the white plastic clips which retain the tube in position, insert the tube fully and release the
clips. The tube should now be regularly compressed by the pump rotors. Fit one end of the tube to
the sample inlet (B).
Using the larger 6mm diameter white nylon tube emerging from the top left side of the unit connect
the free end into the atomising air inlet (C ) on the jet assembly. This is the main compressed air
feed line to the jet nozzle.
Then connect the small diameter blue tube into the de-blocker inlet (A). This is the compressed air
supply for the jet de-blocking system. There is no possibility of connecting these tubes incorrectly
as the connectors are of different sizes. To release these tubes simply push in the black outer ring
on the connector and pull the tube out.
