Georg Fischer DIASTAR SIX Manuel D'utilisation D'origine page 37

Cement connections
PVC-U, PVC-C and ABS - types 514, 515
Only identical materials may be joined together.Pipesections with solvent cement con-
nections should be rinsed unpressurized with water after the drying time (see chapter
jointing methods in the Georg Fischer Planning Fundamentals).
Fusion connections
PP-H, PP-n, PVDF, PVDF-HP - types 514, 515, 519
Only identical materials may be joined together (see chapter jointing methods in the Ge-
org Fischer Planning Fundamentals).
Flange connections
All materials with valve body type 517
The tightening torque can be found in further chapters in the Georg Fischer Planning
Fundamentals.
4.4 Flexible air connection
The air connection is turnable in 90° intervals due to the round design.
Dismounting diaphragm valve or opening the housing nut
The medium may exit uncontrollably or flow out from the pipe or valve, whether
under pressure or not. The valve or pipe may contain residue or remnants of
Warning
an aggressive, hazardous, flammable or explosive medium. Death or serious
injury could occur due to contact with the medium.
• Release all pressure from the piping system
• Empty the piping system completely
• Rinse the system, if aggressive, hazardous, flammable or explosive media
are involved
• Empty the diaphragm valve completely when is has been dismounted. In
order to do so, let the valve drain completely
Procedure – Positioning of air connection
1. Drain and de-pressurized the pipeline. Please consider the safety message "Dismoun-
ting diaphragm valve or opening the housing nut".
2. Move the valve into the "open" position with the control medium (FC,DA)
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