Setting The Working Pressure; Commissioning - GEM N086 Installation, Operating And Maintenance Instructions For The Installer And The User

11.2

Setting the working pressure

1. Unscrew the cap 10 from the valve
bonnet 2.
2. Loosen the lock nut 7.
3. Turn the set screw 8 to the desired position
using a screwdriver / Allen key:
Turn the set screw
clockwise:
Turn the set screw
anticlockwise:
4. Observe the setting range.
Nominal
Type
size
GEMÜ N186 DN 10 - 50
DN 65 - 80
GEMÜ N086
DN 100
5. Secure the setting with lock nut 7.
The working
pressure will
increase
The working
pressure will
decrease
Setting range [bar]
0.5 - 10
1 - 6
1 - 4
29 / 36
12

Commissioning

WARNING
Corrosive chemicals!
® Risk of caustic burns!
Check the tightness of the
G
media connections prior to
commissioning!
Use only the appropriate
G
protective gear when
performing the tightness
check.
CAUTION
Protect against leakage!
Provide precautionary measures
G
against exceeding the maximum
permitted pressures caused by
pressure surges (water hammer).
Prior to cleaning or commissioning the
plant:
If the plant is new and after repairs rinse
G
the piping system with a fully opened
valve (to remove any harmful foreign
matter).
Cleaning:
The plant operator is responsible for

selecting the cleaning material and
performing the procedure.
Important:
Diaphragms set in the course of
time. After valve installation and
commissioning you must retighten
the bolts 9 or 11 diagonally.
N086, N186