SYGEF Product Catalogue

Design of industrial piping systems
Application area of valves
The engineering design of valves supplied by GF is
based on the following design standards:
Ï EN ISO 16135: Industrial valves - Ball valves of
thermoplastic materials
Ï EN ISO 16136: Industrial valves - Butterfly valves of
thermoplastic materials
Ï EN ISO 16137: Industrial valves - Check valves of
thermoplastic materials
Ï EN ISO 16138: Industrial valves - Diaphragm valves
of thermoplastic materials
Ï EN ISO 16139: Industrial valves - Gate valves for
thermoplastic materials
Ï EN ISO 21787: Industrial valves - Globe valves of
thermoplastic materials
The valves easily comply with the requirements set out
in the above standards. In many cases, they exceed the
requirements most notably for pressure / temperature /
load capacity.
It should be noted that depending on the engineering
design, at high temperatures there may be a reduction in
the application limits of pipes and fittings, whether this
be in the amount of the permitted pressure or the
maximum temperature.
The technical data concerning
Ï pressure temperature diagram
Ï pressure loss
Ï flow characteristics
Ï k v values
Ï average values for screw fastenings
Ï mounting and maintenance
Ï electric or pneumatic actuators
are to be found under the planning fundamentals of the
respective valves.
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