Dungs FRM 100025 HD, Instruction Manual, Page: 139 / 174

30 …64
Edition 10.15 • No
. 270 442
31 … 64
14. Maintenance
14.1 General information
• The Pressure Equipment Direc -
tive (PED) requires the regulator to be
checked at regular intervals to ensure:
safety and correct functioning of the
device, high long-term utilisation ratios,
resulting in minimum environmental
impact.
• The maintenance of the device can only be carried
out in compliance with the rules and standards ap-
plicable and in accordance with
current local regulations.
• Maintenance work must only be performed by au -
thorised and skilled personnel.
• Adhere to the maintenance intervals indicated.
• The risks in case of an escape of flammable or nox -
ious gases into the atmosphere have to be assessed.
• Always install new seals after replacement or modifi -
cation of parts.
• Only use original spare parts.
• Do not use alcohol-based or solvent-containing
cleaning solutions for cleaning the device.
Prior to maintenance
• Shut-off valves both on the inlet and outlet side are
closed.
• Lines are unstressed and free from combustible gas.
• Prevent explosive gas-air mixture: the room atmosphere
must constantly be monitored through gas concentration
measuring devices for the detection of gas leakages.
• SSD is in the closing position.
• Original spare parts are available.
Pos. Designation
A Protective cap
B Adjusting screw
C Sealing cap
D Spring washer with ball
E Setpoint spring
F Diaphragm hood
G
Hexagon nut
washer
H O-ring (HD version only)
I Reducing washer (HD version only)
J Locking nut
K Spring washer
L Locking spring
M Working diaphragm
N Guide rod
O Lower diaphragm shell
P Lower diaphragm disc
Q Sealing ring
R Connection pin
S Control plate
T O-ring
U Control plate sleeve
V Valve disc seat
W ... O-ring
X Housing
Y Hexagon washer