2/2-Ways Lacquer Valves 200x
1. Introduction
APSON 2/2-Ways Lacquer Valves 200x are
pneumatically operatable compact needle valves made of
inoxidable steel.
They fulfill their function together with modules
intended therefore e.g. valve blocks, lacquer distributors,
sprayheads etc.
They are designed for applications with aggressive
non-granular fluid media, e.g. lacquers, solvents,
caustic solutions, a.o.
2. Structure and Function
The valves are built from the drive in the pneumatics chamber,
a seal packing in the intermediate chamber and the medium seals
in the medium chamber (actually the valve). Furthermore the valves
have a mechanical visual display for the switching status.
The drive consists of the pneumatic
cylinder, a piston with sealing diaphragm, the valve needle and
the pre-compressed spring for closing the valve,
if the valve is not addressed with compressed air.
The piston and the valve needle
are rigidly connected together.
The seal packing (medium barrier) consists
of several seals, which manage the sealing at the valve needle by
means of a pre-compressed spring, on the one hand to the medium
chamber and on the other hand to the pneumatics chamber.
The medium seal consists of the valve
needle head and seals which withstand aggressive media. All
seals of the valve must therefore be adapted to the media
which are to be used.
The mechanical visual display consists
of a display pin for the switching status of the valve.
The display pin is rigidly connected with the valve needle.
The valve can be switched by pulling on the display pin manually.
Optionally the possibility exists for sensing electrically
the status of the valve by means of a
proximity sensor.
In the screwed in status with the appropriate valve block,
the valve forms one discrete medium chamber each with a radial
inlet and an axial outlet with sealing seat for the medium.
In the inactive status (normal condition),
if no compressed air or control signal pends, the valve is closed.
In the active status, when the valve is
subjected with compressed air, the piston provided with a
fastened diaphragm and fixed at the valve needle squeezes the recoil
spring together. Thereby the valve needle is raised from its
sealing seat at the axial outlet. Thus the flow of the
medium is released.
3. Features
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Fast error recognition in the lacquer system by directly evident switching status.
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Early detecting of leakage of the medium as well as the pneumatics air.
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Mechanical operation of the valve with a special tool possible.
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Delimitation of the flow rate by variable operating path.
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Fast valve exchange, and efficient maintenance and spareparts management.
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Small pressure losses between medium inlet and medium outlet.
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Very good rinsing characteristics, because of APSON deathroom-free valve technology.
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Very compact design.
4. Technical Data
| Denomination: | APSON Lacquer Valves 200x |
| Media: | Aggressive media (lacquers, solvents, caustic solutions, a.o.) |
| Medium pressure: | approx. 12 bar (or in accordance with customer's request) |
| Pneumatic control air pressure: | 6 to 8 bar |
| Medium-touching housing parts: | Inoxidable steel |
| Piston seal: | Teflon™ |
| Main seal: | Teflon™ (optional Kalrez™ or FFKM™) |
| Housing seals: | Viton™ |
5. Service Life
For the APSON Lacquer Valves 200x the following service
lives were determined within the basecoat area. The service life
for valves, at operation with basecoat lacquer amounts to
approx. 500,000 operating cycles. For a troublefree operation of
the lacquer valves all 300,000 operating cycles a visual inspection
must be executed. The visual inspection is to be executed first at
the installed valve and afterwards in the unscrewed status.
The installed valve must be outward absolutely tight:
-
If pneumatic air withdraws from the bleed bore (annular gap cover), the pneumatic seal at the piston must be exchanged.
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If peumatic air withdraws from the exhausting drilling of the valve needle, the piston sided seal (air side) of the valve needle for the pneumatic control air must be exchanged.
-
If lacquer withdraws from the exhausting drilling of the valve needle, the seal at the valve needle (lacquer side) must be exchanged.
At the unscrewed valve the following critical parts are to
be checked for wear:
-
Main seal of the needle
-
O-rings of the valve
-
Needle seals to compressed air side resp. to the lacquer side
Important: After approx.
300,000 switching cycles the compression spring in the pneumatics
chamber must be exchanged by a new compression spring.
The exchange can be made with installed valve within one minute.
For the sake of safety, the medium can be switched pressure-free.
Eventually the inner surface of the pneumatic cylinder is to
be coated again with valve fat.
6. Ordering Data
| Denomination | Part-Nr. |
| APSON 2/2-Ways Lacquer Valve 2015, PF2 (for Lacquer Changer 2000, a.o.) | 060-A030 |
| APSON 2/2-Ways Lacquer Valve 2016, PF2 (for Lacquer Changer 2009, 2010, a.o.) | 060-A031 |
| APSON 2/2-Ways Lacquer Valve 2017, PF2 (for Lacquer Changer 2008 N, a.o.) | 060-A033 |
| APSON 2/2-Ways Lacquer Valve 2017, T3 (for Lacquer Changer 2008 N, a.o.) | 060-A035 |
| APSON 2/2-Ways Lacquer Valve 2014, T3 (for Lacquer Changer 2000, a.o.) | 060-A029 |
| APSON 2/2-Ways Lacquer Valve 2000 with special seal (for Lacquer Changer 2000, a.o.) | 060-A008 |
| APSON 2/2-Ways Lacquer Valve 2000 (for Lacquer Changer 2000, a.o.) | 060-A010 |
| APSON 2/2-Ways Lacquer Valve 2009, PF2 | 060-A013 |
| APSON 2/2-Ways Lacquer Valve 2001 (old!) | (060-A002) |
| APSON 2/2-Ways Lacquer Valve 2002 (for lacquer Changer 2007) | 060-A004 |
| APSON 2/2-Ways Lacquer Valve 2003 (for APSON Sprayhead 200x) | 060-A011 |
Options:
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Main seal of Kalrez™
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Non-medium-touching housing parts from aluminum
APSON Lackiertechnik GmbH, Am Wiesengrund 15, D-63075 Offenbach
Mobile: +49-171-373-16-33 Phone: +49-69-82-369-447 Fax: +49-69-82-369-448
www.apson.de email@apson.de
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