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Page 17
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Maintenance
C411-02-880 Issue J
5
Maintenance
5.1
General
PVEK valves do not require routine maintenance during their normal operational life. If the valve is faulty, refer to
the following sections.
5.1.1
Safety information
Ensure that maintenance is done by a suitably trained and supervised technician. Obey your local and
national safety requirements.
Observe all appropriate safety precautions when you maintain a valve from a system in which dangerous
process substances have been pumped.
Isolate the valve from the electrical supply and your vacuum system before you start maintenance.
Observe all appropriate safety precautions when you come into contact with solvents and fluoroeleastomer
‘O’ rings.
Ensure that you do maintenance in a well ventilated area.
Do not use abrasive or reactive chemicals to clean the valve.
Do not use solvents to clean ‘O’ rings.
Safely dispose of all components which have been contaminated by dangerous process substances.
5.1.2
Fluoroelastomers
The seals and ‘O’ rings used in the PVEK valve are made from a fluoroelastomer. Fluoroelastomers can decompose
into very dangerous substances if they are heated to 260 °C and above. The valve may have overheated if your system
has been misused, if it has malfunctioned or if the valve has been in a fire. If the valve has overheated, ensure that
you observe the appropriate safety precautions to prevent contact with the seals and ‘O’ rings.
WARNING
Obey the safety instructions given below and take note of appropriate precautions. If you do not
you can cause injury to people and damage to equipment.
