Nordson Compact Manual Iso-Flo Voltage-Block, Manual

Page: 27 / 76

Description
2-5
E 1996 Nordson Corporation
All rights reserved
108 390B
Issued 7/96
Manual 10-10
The Compact Manual Iso-Flo system is controlled by the trigger of the
spray device. When the trigger is squeezed, the Iso-Flo system
operates. When the trigger is released, the spray pump fills and the
shuttles close, waiting for the next pull on the trigger. You do not need to
make any special connections to the spray device, so any manufacturer’s
electrostatic waterborne spray device will operate the Iso-Flo system.
See Figure 2-2. The following occurs when the trigger is squeezed:
1. Squeezing the trigger (2) starts the flow of coating material and
atomizing air.
2. The flow sensor (16) detects the flow of atomizing air and sends a
separate air signal to the door interlock valve (11). If the cabinet door
is closed, the air signal from the flow sensor passes through the door
interlock valve to the pilot on the pilot valve (14).
3. The pilot valve (14) switches, causing compressed air from the
atomizing air source to pass through the pilot valve, enter the coating
material shuttle assembly (12), and force the shuttle down to the open
position.
4. The compressed air passes through the shuttle valve (19) and the air
release valve (6) to the air motor on the pump (5). This operates the
pump’s air motor and pressurizes the coating material to the spray
device (1).
Releasing the trigger momentarily does nothing until the time delay
expires and the flow sensor stops sending air to the door valve. This
relieves pressure to the pilot on the pilot valve, switching to its normal
position.
1. In the normal position, compressed air passes to the bottom of the
shuttle cylinder causing the shuttle to close.
2. While the shuttle is closed, the coating material passes through the
shuttle and refills the pump.
3. The next time the trigger is squeezed (whether the pump is
completely refilled or not), the sequence repeats.
3. How the System Works
Start Spraying
Stop Spraying