Model A7AA Air Assisted Airless Gun
8
2000 Nordson Corporation
All rights reserved
108 046C
Issued 1/00
Manual 4-20
NOTE: The A7AA can be mounted to a 12.7 mm (0.5 in.) round bar. The
gun or the mounting bar should be mounted in such a way as to allow for
easy removal for service. Slide the mounting bar through the mounting
hole on the gun body (1), then tighten the square-head screw (2).
CAUTION: Do not over tighten fluid fittings. Over tightening
may cause damage to the gun body.
1. Connect a
1
/
2
-20 JIC coupled airless fluid hose to the
1
/
2
-20 JIC fluid
fittings (4). Material will flow in either direction.
2. Connect a pneumatic hose to carry clean, regulated air to the
1
/
8
NPT
street elbow (3) located directly beneath the gun nameplate.
3. Connect an electro-pneumatic solenoid with a dump port via an air
hose to the gun at the
1
/
8
NPT street elbow.
NOTE: It is not recommended that long air hoses be used between the
gun and the solenoid. Long hoses cause a pneumatic delay, producing
slow gun on/off cycling, spitting, and premature wear of the ball and seat.
Three to six meters (ten to twenty feet) of hose is normal.
3. Installation
