Nordson VersaBlue VA - Safety Valve Plate; Tank Isolation Valve; Safety Valve; Tank

2
1
Fig. 2‐2
1
2
3
Fig. 2‐3
1
2
3
1 Hose connection
2 filter cartridge
3 Pressure control valve
Introduction
2‐6
P/N 213828_11
 2014 Nordson Corporation
VersaBlue_PPA
Safety Valve Plate
Tank Isolation Valve
The tank isolation valve (1) enables replacement of the gear pump without
first emptying the tank.
Safety Valve
The standard safety valve (2) is fixed at
85 bar 8500 kPa 1235 psi.
When the pressure is exceeded, the safety valve opens, allowing the
material to circulate within the safety valve plate.
Tank
The tank is divided into grid (low melt) and reservoir (high melt) sections. An
insulating seal (2) provides a temperature barrier between the two sections.
The temperature barrier allows the material in the grid section (1) to be gently
melted at a low temperature. The material is then heated to processing
temperature in the reservoir (3).
Pressure Control Valve
The mechanical pressure control valves (3) can be manually adjusted from
5 to 90 bar 500 to 9000 kPa 72.5 to 1305 psi.
One pressure control valve per pump is standardly installed after the filter
cartridge.
The pneumatic pressure control valve replaces the mechanical pressure
control valve with some options.
With the option Pressure control, the bore for the pressure control valve is
sealed with a plug.
Pneumatic Pressure Control Valve
The pneumatic pressure control valves used with the options Automatic
pneumatic pressure control and Bypass control are not pressurized until
temperature enable has occurred. This prevents excessive adhesive
pressure from building up during the heatup phase.
For this purpose, electrical triggering is linked to the signal System ready,
which is also used for the light tower.