1. Introduction to top
The APSON Minivalve VNT-3015 is a
normally closed, pneumatically controllable 2/2-ways
tandem-valve for aggressive work materials, e.g. lacquers, solvents,
alkalis. It operates with the standard pneumatic pressures of the
industry. It is mainly used in special
applications as well as in the APSON Mini
Lacquer Changer LCM-2010.
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Indicator for switch status and sealage resp. leakage.
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Very compact 2-pistons tandem-valve, suitable for the standard
pneumatic pressures of the industry.
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Metallic parts made of stainless steel, seals are resistant
against aggressive work materials.
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Assembly and disassembly using simple tools.
3. Structure and Function to top
The APSON Minivalve VNT-3011 is a
normally closed 2/2-ways valve. The casing and parts
are made of stainless steel. Located inside the casing, (see figure 2),
are two axially arranged pressure chambers, each with a piston and piston
seal. Through these chambers leads pressure-tight an axial, movable hollow
valve needle, at which the two pistons and the main seal of the valve are
fixed. The rear part of the valve needle is visible and contains an axial
bore. This allows to determine the switching state and the sealage or
leakage of the valve. The work material and the pneumatic control air are
supplied through the valve block.
If the pressure chambers are charged with compressed air, the valve
opens. The air release is effected by ventilation holes. Due to the tandem
design, the pushing forces of the two pistons sum. A compression spring in
the compression spring chamber closes the valve as soon as it is no longer
charged with compressed air. The actual valve chamber for switching of the
work material and the sealing seat of the main seal are located in the
respective valve block (see APSON Mini Lacquer
Changer LCM-2010).
Legend: 1=indicator for the
switching state and the sealage or leakage, 2=housing lid, 3=compression
spring, 4=valve housing, (wrench size 17 mm), 5=venting bore of the
pressure spring chamber, 6=housing seals, O-rings, 7=rear piston with
piston seal, 8=rear pressure chamber, 9=sealing plate for the pressure
chamber, 10=vent space, 11=front piston with piston seal, 12=front
pressure chamber, 13=control-air channels, 14=valve needle seals, 15=valve
needle, 16=main seal of the valve, 17=wrench surface (wrench size 1.5
mm).
4. Technical Data to top
Designation: |
APSON
Minivalve VNT-3011 |
Valve type: |
Normally closed, 2/2-ways |
Work materials: |
Solventborn and waterborn lacquers, solvents, alkalis, a.o. |
Work material pressure: |
Max. 15 bar |
Pneumatc control air pressure: |
6 to 8 bar |
Materials: |
Housing parts: stainless steel, housing seals: Viton™ |
Seals of valve needle and pistons: |
Teflon™ and/or Kalrez™, or on customers request |
Main seal, valve needle cone: |
UHMWP (Ultra High Molecular Weight Polyethylene) |
Dimensions [mm] L x M, WS: |
Approx. 47 x (M 17 x 1), wrench size 17 |
Mass: |
Approx. 30 g |
5. Ordering Data to top
Designation |
Ordering-Nr. |
APSON Minivalve VNT-3011 |
060A060 |