Metso Neles ND9100P, Инструкция по установке, обслуживанию и эксплуатации

Страница: 20 / 40

20 7 ND91P 70 en
6.2 Spool valve assembly
Before removing the spool valve assembly (193) the
prestage (120) must be removed. See 6.1.
6.2.1 Removal
❑
Unscrew the M4 screws (47, 3 pcs.), M3 screws
(48, 2 pcs.) and M3 screw (49). Remove the
spool valve assembly.
❑
The spool valve may be cleaned if special atten-
tion is paid to a clean environment and proper
procedure. After unscrewing the M4 screws (47,
3 pcs.) the spool valve may be lifted from the fix-
ture. Hold the ends of the body with your fingers
to avoid dropping the spool from the body. Clean
the spool and the bore of the body with care. Do
not leave any fibres from cleaning materials in
the bore or on the spool. Do not scratch the mat-
ing surfaces of the spool and body. The restrictor
is located under the spool valve in the fixture. It
may be cleaned when the spool valve is
removed.
6.2.2 Installation
❑
Ensure that the gasket (174) is properly located
in the groove on the bottom of the spool valve
assembly. Mount the spool valve assembly on to
the housing and tighten the M3 and M4 screws
evenly. Ensure the O-ring (140) slots inside the
groove fully. Mount the prestage unit directly on
the spool valve unit as in 6.1.
6.3 Communication circuit board
6.3.1 Removal
❑
Loosen the M8 grub screw (110) off the position
indicator (109) and turn the position indicator
from the shaft. Remove the cover off the prestage
(43). Remove the cover of the circuit boards
attached with M3 screws (42, 4 pcs.).
❑
Remove the M3 screws (217, 4 pcs.). Hold the
sides of the circuit board and lift it directly
upwards and outwards. Handle the board care-
fully, touching only the sides.
6.3.2 Installation
❑
Mount the new communication circuit board
carefully.
❑
Locate the pins with the matching connector on
the board. Tighten the M3 screws (217) evenly.
❑
Install the cover of the circuit boards and the
cover of the prestage (43).
❑
Mount the position indicator (109) on the shaft
and tighten the M8 screw (110) temporarily. The
final orientation and locking of the position indi-
cator should be done after installation of the
valve controller to the actuator.
NOTE:
Each spool valve body has an individual correspond-
ing spool which cannot be replaced by any other
spool. Never alter the orientation of the spool.
The orientation of the spool is marked on the spool
valve body, see Fig. 22.
Fig. 22 Spool valve assembly
NOTE:
If the maintenance operations have been done for the
spool valve assembly, the device
must always be cal-
ibrated and tuned.
195 194 140 160 174 175
0327000170
Assembly direction of spool
Sticker on fastener (160)
NOTE:
Ground yourself on the body of the device before
touching the circuit board.
NOTE:
Do not remove the Valve Controller Board (210)!
Removing the board will void the warranty.
Fig. 23 Communication board
215