Hawle HAWIDO 1400, Руководство пользователя

Страница: 15 / 30

-12-
Checking the operation of the one-way flow restrictor
•
Undo the locknut
•
Screw in the set screw and then unscrew it as far as it goes
•
Screw in again a few turns. This process must be easy and with little resistance
Putting the valve back into service
•
see chapter Commissioning
Checking the operation of the valve
The pressure-sustaining valve has to be set eventually in such a way for the check that the inlet pressure
permits the opening of the valve (see also the Chapter:
Commissioning ).
•
Close the ball valve (2C) slowly ; Valve must close.
•
Open the ball valve (2C) slowly ; Valve must open.
3. Repair kits and spare parts
Several spare parts are required for the four or five yearly maintenance. These can be obtained as a repair
kit for:
•
the main valve
•
for the control valve
•
for the control circuit
•
optical position indicator
The article numbers are shown in the parts lists and spare parts lists.
Attention:
When ordering spare parts, always specify the valve type, serial number and year of manufacture.
Important:
Spare parts of EPDM (membrane, seals) and NBR (O rings) have to be stored in a dark place, protected
from UV radiation!
Durability in dark storage:
EPDM: eight years after production
NBR: five years after production