Rev. 1.3
Assembly Instructions - Spray Valve SMS-22
Page 7 of 25
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
4 Description of Function
The automatic spray valves of the
SMS-22
series are pneumatically controlled and are suitable for the finest
application of liquid up to pasty media, such as adherents, oils or greases or colors. The spraying process is
produced through the control air, the material supply pressure and the atomizer air; and it can be either in-
termittent or continuous. Depending on the selected air cap, a flat jet or a round jet will be produced. The
needle function is: open through air pressure / close through air pressure.
4.1 Purpose of the Device
CAUTION
The use of other media can cause functional failures, damages or even the destruction of the
device.
Control air will be supplied to the spraying device via a 5/2-way pilot valve (
not included in delivery
); when in
basic position it has a passage for closing the needle. If the pilot valve receives a signal, the front area of the
needle piston will be filled with air which causes the needle piston to push back the spring, and the needle
opens.
The medium can now escape from the nozzle. When the signal on the pilot valve stops, the spray valve will
be closed (needle will be pushed into the nozzle).
The atomizer air divides the material into a spray jet and can be controlled through a 3/2-way magnetic valve
(
not included in delivery
). A short pre- or post-spraying can also be required. And a suitable device has to be
employed for pressure control.
When the control air is turned off or fails, the needle spring will close the spraying device.
The medium itself is supplied to the valve from a pressured container or via a pump.
4.2 Technical Data
General Data
Size with Flat-jet air cap [mm]
ca. 131 x 58 x 24
Size with Round-jet air cap [mm]
ca. 127 x 58 x 24
Weight [g]
Frequency (per second)
ca. 500
max. 30 (see note under 6.2)
Energy Supply
Control air pressure [bar]
5-6
Atomizer air pressure [bar]
max. Control air pressure - 0,5 bar
Material pressure [bar]
max. 35
Temperature [°C]
max. 80
4.3 Type Label
The type label was etched into the casing near the
material connection. The serial number is also
hammered into this label.
.
