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Cleaning VTK - TR -BA- 171e - 1 - User Manua l MDS 3080 -V 133 INFORMATION Auto mati c closi ng After ca. 2 m in the v alve closes autom atica lly, i n order t o protect t he actuator. Altern atively, the procedur e can …

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Cleaning
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VTK-TR-BA-171e-1 - User Manual MDS 3080-V
9.4 Cleaning Methods
The following methods are available:
• Pre-purifying
• Rinsing with a purifying agent
• Total disassembly of the valve, followed by fine purification
For a thorough cleaning process, you need:
• A cleaning tool kit CTK 2.5
• Nozzle insert cleaning wires (of the correct size)
• A lint-free cloth
• An ultrasonic bath
• A beaker with a compatible cleaning liquid (e.g. Isopropanol)
• A pointed pair of tweezers
• The necessary tools for mounting and demounting as recommended by VERMES (see
paragraph 3.3, page 15).
9.4.1 Pre-purifying
Pre-purifying consists in purging the system with compressed air.
CAUTION
Potential liquid spurts
During this procedure, liquid droplets may be expulsed!
Users must protect themselves correspondingly (protective clothing, safety goggles).
Step 1:
– Complete the dispensing process. The valve is in closed position.
Do NOT switch OFF the control unit.
Step 2:
– Separate the compressed-air connection.
– Reduce the pressure to 0 bar.
– Disconnect the PP adapter fitting from the cartridge.
Step 3:
– Replace the used cartridge by a new one.
Step 4:
– Reinstall the compressed-air connection as follows.
– Place the PP adapter fitting on the cartridge. Rotate clockwise, until it latches in place.
– Connect the PVC hose with the KS4-CK-6 coupler plug to a compressed-air supply. For this
purpose, you require a KD4-1/2-A coupler socket.
– Activate the compressed-air supply.
Step 5:
– Place a container underneath the valve, to collect any liquid dripping out.
Step 6:
– Initiate the purging procedure by pressing [F1].
– Keep the [F1]-key pressed until the procedure is complete and no more liquid flows out
through the nozzle unit.
Cleaning
VTK-TR-BA-171e-1 - User Manual MDS 3080-V
133
INFORMATION
Automatic closing
After ca. 2 min the valve closes automatically, in order to protect the actuator.
Alternatively, the procedure can be performed by the RS-232C interface. Use the commands
VALVE:UP and VALVE:DOWN for this purpose.
Step 7:
– Separate the compressed-air connection and remove the cartridge.
Step 8:
– Make sure the collected liquid in the container is disposed of according to local regulation.
9.4.2 Rinsing with a purifying agent
After pre-purification by compressed air, residual liquid may still be present inside the fluid
system (particularly when dispensing high-viscous substances). It can only be removed by a
flushing procedure. For this purpose, the following examples may be suitable agents:
• Distilled water
• Ethanol
• Isopropanol (IPA)
• Acetone
WARNING
Potential chemical reactions
Before the start of the procedure, carefully read the safety data sheet of the dispensed substance.
Ensure compatibility with the cleaning agent.
The cleaning agent itself should not react with any part in contact with the fluid.
Consult the manufacturer in case of need, especially if you intend to use aggressive material.
Step 1:
– Complete the dispensing process. The valve is in closed position. Do NOT switch OFF the
control unit.
Step 2:
– Separate the compressed-air connection.
– The pressure must be reduced to 0 bar.
– Disconnect the PP adapter fitting from the cartridge.
Step 3:
– Replace the used cartridge by a new one.
– The purifying agent can be supplied.
CAUTION
Check for leaks
All of the connectors must be installed and leak-tight.
Cleaning
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VTK-TR-BA-171e-1 - User Manual MDS 3080-V
Step 4:
– Reinstall the compressed-air connection as follows.
– Place the PP adapter fitting on the cartridge. Rotate clockwise, until it latches in place.
– Connect the PVC hose with the KS4-CK-6 coupler plug to a compressed-air supply. For this
purpose, you require a KD4-1/2-A coupler socket.
– Activate the compressed-air supply.
Step 5:
– Place a container underneath the valve, to collect any liquid dripping out. The container
needs sufficient capacity to contain the purifying agent together with the solved residual
liquid.
Step 6:
– Initiate the purging procedure by pressing [F1].
– Keep the [F1]-key pressed until the procedure is complete and no more liquid flows out
through the nozzle unit.
INFORMATION
Automatic closing
After ca. 2 min the valve closes automatically, in order to protect the actuator.
Alternatively, the procedure can be performed by the RS-232C interface. Use the commands
VALVE:UP and VALVE:DOWN for this purpose.
Step 7:
– Separate the compressed-air connection and remove the cartridge.
Step 8:
– Make sure the collected liquid in the container is disposed of according to local regulation.