Component Identification - Graco Therm-O-Flow 20 EasyKey NXT 2200 Instructions-Parts List Manual

Overview

Component Identification

Before installing the system you should be familiar with
all the Therm-O-Flow system components. See F
Contact your Graco distributor for help in designing a
system to suit your particular needs.
The air-powered ram extruder forces high viscosity flu-
ids into the intake valve of the fluid pump. Wiper rings
and other accessory equipment for use with this ram are
listed in 253154 and 253160 Controls on page 58.
Air Line Components
The following components are included with the unit.
See F . 1.
IG
The Air Motor Bleed-type Master Air Valve (D) is
required in your system to relieve motor air pressure.
Trapped air can cause the pump to cycle unexpectedly,
which can result in serious bodily injury.
• System Bleed-type Master Air Valve (A) is used to
shut off the air supply to the entire system.
• Air Line Filter (B) removes dirt and moisture from
the compressed air supply.
• Air Motor Enable Solenoid/Depressurization Valve
(V) opens to allow air to the Air Motor Air Regulator
(C) and exhausts air from the air motor at shutoff.
The built-in control delays start-up to allow material
to heat thoroughly.
• The Air Motor Remote Piloted Air Regulator (X) reg-
ulates air pressure to the air motor.
• Air Motor Bleed-type Master Air Valve (D) shuts off
the air supply to the air motor and bleeds trapped air
from the air motor.
Pneumatic Control Panel
The Pneumatic Control Panel (M) includes the following.
See F . 1.
IG
• Platen Blow-off Valve (S) directs air to the underside
of the platen when depressed.
• Blow-off Air Regulator (T) controls the air pressure
to the platen blow-off valve.
8
• Air Motor Air Regulator (C) controls the pump outlet
pressure by adjusting the air pressure to the air
motor.
. 1.
IG
• Ram Up/Down Lever (R) changes the direction of
the ram.
• Ram Air Regulators (N, P) control the air pressure
to the ram. There are separate air regulators to con-
trol the ram pressure in the up and down directions.
EasyKey Display and Keypad
EasyKey is a simple user interface consisting of an LCD
display and keypad (L) which controls Therm-O-Flow 20
operations.
Air and Fluid Hoses
The Therm-O-Flow 20 requires Graco single-circuit
material hoses rated at a maximum of 1250 Watts.
When installing a system make sure that all air and fluid
hoses are properly sized and pressure rated for the sys-
tem.
Fluid Line Accessories (Typical)
A pressure compensator valve controls fluid pressure to
the gun/valve, and dampens pressure surges. Install a
pressure compensator valve in the fluid line, using
adapters as necessary.
311976A