GEM 651 - 3 Definition of Terms; 4 Intended Area of Use; Symbols Used

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651
2.3 Symbols used
Danger - hot surfaces!
Danger - corrosive materials!
Hand: indicates general informa-
tion 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
diaphragm valve.
Control medium
The medium whose increasing or
decreasing pressure causes the diaphragm
valve to be actuated and operated.
Control function
The possible actuation functions of the
diaphragm valve.
4 Intended area of use
 The GEMÜ 651 diaphragm 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 5
"Technical data").
 Do not paint the bolts and plastic parts of
the diaphragm valve!
WARNING
Use the diaphragm valve only for the
intended purpose!
® Otherwise the manufacturer liability and
guarantee will be void.
G Use the diaphragm valve only in
accordance with the operating
conditions specifi ed in the contract
documentation and in the installation,
operating and maintenance
instructions.
G The diaphragm valve must not be used
in potentially explosive zones.