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554
2.3 Symbols used
Danger - hot surfaces!
Danger - corrosive materials!
Hand: indicates general information
and recommendations.
G Bullet point: indicates the tasks to
be performed.
® Arrow: indicates the response(s) to
tasks.
Enumeration sign
3 Definition of terms
Working medium
The medium that flows through the valve.
Control medium
The medium whose increasing or
decreasing pressure causes the valve to be
actuated and operated.
Control function
The possible actuation functions of the
valve.
4 Intended area of use
The GEMÜ 554 2/2-way angle seat globe
valve is designed for installation in piping
systems. It controls a fl owing medium
by being closed or opened by a control
medium.
The valve may only be used providing
the product technical criteria are
complied with (see chapter 6
"Technical Data").
The valve is also available as a control
valve.
WARNING
Use the valve only for the intended
purpose!
® Otherwise the manufacturer liability and
guarantee will be void.
G Use the valve only in accordance with
the operating conditions specifi ed in
the contract documentation and in the
installation, operating and maintenance
instructions.
G The valve may only be used in
potentially explosive zones confi rmed
in the declaration of conformity (ATEX).
5 Condition as supplied
to customer
The GEMÜ valve is supplied as a separately
packed component.
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