Forewor
29.06.2016
DOUBLE-SEAT VALVE (Type 491)
BA 049100.06 EN 5 / 34
1 Foreword
This operating manual is for the information of the service personnel, the user and if
necessary specialist personnel. It is part of the valve delivery. No chapter from this manual
may be deleted. A missing operating manual or missing pages are to be replaced
immediately.
An understanding of the double-seat valve's function is a prerequisite for a smooth
operation.
Every person charged with the valve’s installation, commissioning, operation,
maintenance and repair must have read this manual and especially the chapter on safety
and have understood both the content and the terminology.
If necessary, in-house instruction taking into account the specialist qualifications of the
respective persons must take place.
In order to avoid operating errors and to ensure the correct implementation of the
required testing measures, this operating manual must be available at all times to the
operating personnel.
The Handtmann Armaturenfabrik assumes no responsibility for damages or operating
faults resulting from the non-compliance with this operating manual!
This documentation may be amended by the updating service of Albert Handtmann
Armaturenfabrik GmbH & Co. KG. Amendments to this document may be carried out
without prior notification.
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