1. Introduction to top
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.
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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
deadroom-free valve technology.
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Very compact design.
3. Structure and Function to top
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.
4. Technical Data to top
Denomination: |
APSON Lacquer Valves 200x |
Media: |
Aggressive media (lacquer, solvent, caustic solution, 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 to top
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:
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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.
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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:
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 to top
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 2014, P (for Lacquer
Changer LCLT-20K4 and LCLT-25K4, a.o.) |
060-A039-6 |
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 |