Installation; General Information; Installation Process - Georg Fischer DIASTAR SIX Manuel D'utilisation D'origine

6. Installation

6.1 General information

Diaphragm valve installation in a piping system is subject to the same regulations as
other connecting elements of pipes, fittings and related piping system components. Fur-
ther chapters in the Georg Fischer Planning Fundamentals give you additional informa-
tion regarding installation and jointing methods.

6.2 Installation process

Use of grease on the threaded connection between housing nut and valve
body
The use of grease, especially on amorphous plastics, can cause stress cra-
Warning
cking on the valve body. Death or serious injury could occur due to contact with
the medium. The function of the valve is not warranted.
• Irrespective of the valve body material, do not use grease for the threaded
connection between housing nut and valve body
Before installation, please check the diaphragm valve accordingly to the following points:
• Inspect the diaphragm valve for transport damages. Damaged valves must not be in-
stalled
• Only use diaphragm valves where the valve and the diaphragm correspond specifically
to the materials, pressure rating, type of connection and dimensions for the particular
application
• Carry out function test: open and close the diaphragm valve
• Diaphragms and other sealing elements should be checked before mounting to make
sure there are no damages from aging. Aged parts which exhibit hardening or fissures
must not be installed
• You must not install valves which do not function properly
• After installation another function test is to be carried out
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