Pinch Valve Assembly
9
Part 768670A
.
2005 Nordson Corporation
When in operation, the top pinch valve (1) opens for a controlled specific
time causing the powder that has accumulated to flow out of the surge
hopper and in to the chamber below. The top pinch valve then closes and
the bottom pinch valve (2) opens. Compressed air is then automatically
injected in to the chamber to push the powder out of the whole assembly
and in to transfer tubing which transports the powder to a sieve or storage
equipment.
The sequence of operation is controlled by the pinch valve controller
situated in the booth control cabinet or the feed centre, dependent upon
type of booth. These sequence settings are factory set, and should only be
modified by Nordson personnel.
Raising And Lowering The Surge Hopper For Cleaning
See Fig 3
A raise / lower toggle switch is situated on the side of the surge hopper
lifting mechanism. Flicking the toggle switch upwards raises the lifting
mechanism, flicking the toggle switch downwards lowers the mechanism.
Figure 3
Surge hopper lifting mechanism toggle switch.
Refer to control panel documentation for details on activating the pinch
valve pumping sequence
