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Cleaning VTK - TR -BA- 171e - 1 - User Manua l MDS 3080 -V 131 9.3 Compatibility bet ween Sealing M aterial s and Selecte d Media NBR EPDM V ITON SILICONE PE PTFE CeTeD ur Aceton e --- +++ --- - + +++ +++ +++ Ammon ia --…
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VTK-TR-BA-171e-1 - User Manual MDS 3080-V
9.2 Heat Resistance of Sealing Materials
The following table shows the maximum temperature to which the respective sealing materials
may be exposed.
Material Max. Temperature [in °C]
PE
80
PTFE
230
NBR
100
EPDM
140
Silicone
200
Viton
220
CeTeDur
250
Tab. 27: Heat Resistance of Sealing Materials
Cleaning
VTK-TR-BA-171e-1 - User Manual MDS 3080-V
131
9.3 Compatibility between Sealing Materials and Selected Media
NBR EPDM VITON SILICONE PE PTFE CeTeDur
Acetone
---
+++
---
- +
+++
+++
+++
Ammonia
---
---
---
+++
+++
+++
+++
Chloroform
---
---
+++
---
+++
+++
+++
Cyclohexane
+++
---
+++
---
+++
+++
+++
Cyclohexanol
+++
---
+++
- +
+++
+++
+++
Cyclohexanone
---
---
---
---
---
+++
+++
Dimethylformamide
---
+++
---
- +
+++
+++
+++
Acetic acid
---
---
---
- +
+++
+++
+++
Ethanol
+++
+++
---
+++
+++
+++
+++
Heptane
+++
---
+++
---
- +
+++
+++
Hexane
+++
---
+++
---
- +
+++
+++
Isopropanol
- +
+++
+++
+++
+++
+++
+++
Methylene Chloride
---
---
- +
---
---
+++
+++
Nitromethane
---
- +
---
---
+++
+++
+++
Pentane
+++
---
+++
---
---
+++
+++
Mercury
+++
+++
+++
+++
+++
+++
+++
Silicone Oil
+++
+++
+++
- +
+++
+++
+++
Toluene
---
---
---
---
- +
+++
+++
Water
+++
+++
+++
+++
+++
+++
+++
Xylene
---
---
+++
---
- +
+++
+++
Legend
Excellent compatibility
+++
No or only a marginal influence on the component.
Moderate compatibility
- +
Limited contact and sporadic exposure to the media will allow some
usability, but long term it will lead to malfunctions of the component. If
possible, use materials with a higher compatibility.
No compatibility
---
Usage is not recommended.
Tab. 28: Compatibility between Sealing Material and Selected Media
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.