Selecting A Spray Tip - Graco PRO AA5500sc unicarb Instruction Manual

Selecting a Spray Tip

The fluid output and pattern width depend on the size
of the spray tip, the fluid viscosity, and the fluid pres-
sure. Use the Spray Tip Selection Chart on page 51,
as a guide for selecting an appropriate spray tip for
your application or consult your authorized Graco
distributor. The orifice size of the spray tip is typically
one or two sizes larger than the pre-orifice size
selected below.
Selecting a Pre-Orifice
The fluid flow rate in UNICARB systems is controlled
by the pre-orifice size, in conjuction with the fluid
pressure. Use the pre-orifice selection chart on page
49 as a guide for selection.
Installing the Pre-Orifice
WARNING
To reduce the risk of a serious injury, including fluid
injection, follow the Pressure Relief Procedure on
page 17 when you stop spraying and whenever you
are instructed to relieve the pressure.
1. Place the spray tip seal (13a) on a flat surface.
See Fig. 12.
2. Note that the hole through the pre-orifice (13b) is
larger on one side than the other.
18 308937
Operation
3. Place the pre-orifice (13b), with its larger hole
facing up, on top of the tip seal (13a) hole.
4. Use a large, flat object to press the pre-orifice
(13b) into the tip seal (13a), as shown in Fig. 12.
Fig. 12
5. Turn over the tip seal and pre-orifice (13a, 13b)
and insert them into the spray tip (13), wih the
pre-orifice side facing down into the spray tip. See
Fig. 13.
Fig. 13
13b
PRESS DOWN
with a large, flat
object
13a
8799A
13a, 13b
13
8799A