Metso ND9200H, Installation Maintenance And Operating Instructions, Page: 8 / 32

8
❑
Adjust the distance of the positioner to the pin on
the actuator stem so that the pin stays in the lever
slot at full stroke. Ensure also that the maximum
angle of the lever does not exceed 45° in either
direction. Maximum allowed travel of the lever is
shown in Section 10.8. Best control performance
is achieved when the feedback lever utilises the
maximum allowed angle (±45° from horizontal
position). The whole range should be at least 45°.
❑
Make sure that the positioner is in right angle and
tighten all the mounting bolts.
❑
Ensure that the positioner complies with previous
steps. Check that the actuator pin does not touch the
positioner case throughout the entire stroke of the actu-
ator. If the actuator pin is too long it may be cut to size.
❑
Apply grease (Molykote or equivalent) to the con-
tact surfaces of the actuator pin and the feed-
back arm to reduce wear.
3.6 Piping
Table 2 provides the recommended tube sizes in
accordance with actuator sizes. Tube sizes are the mini-
mum values allowed. For supply air choose a tube one
size bigger. Operating times may be tested by the Field-
Care software.
Connect the air supply to S (1/4 NPT ).
Connect C1 and C2 (1/4 NPT) to the actuator, see Fig. 6.
ND9200H is connected direct to the EC or EJ actuator.
Connections C1 and C2 (1/4 NPT) must be plugged, see
10.2 and 10.3.
Liquid sealants, such as Loctite 577 are recommended
for the pipe threads.
The air supply must be clean, dry and oil-free instrument
air, see Section 2.4.
Fig. 5 Shaft coupling alternatives
VDI/VDE 3845 mounting
20 15 30
nelesCV Globe mounting
EC/EJ flush mounting
pointer
mark on
housing
IEC 60534 mounting
45˚
pointer
mark on
housing
45˚
pointer
mark on
housing
45˚
pointer
mark on
housing
45˚
CAUTION:
Do not exceed the permitted supply pressure of
the ND9200H!
NOTE:
A valve controller mounted on a spring actuator must
be connected only as single-acting. See Fig. 6.
NOTE:
An excess of sealant may result in faulty operation of
the controller.
Sealing tape is not recommended.
Ensure that the air piping is clean.
Table 1 Spring rates
Actuator type Spring rate (bar/psi)
B1JK 3 / 43
B1J 4.2 / 61
B1JV 5.5 / 80
QPB 3 / 43
QPC 4.3 / 62
QPD 5.6 / 81
EJK 3 / 43
EJ 4 / 57
EJV 5 / 72
Adjust regulator pressure to a level that is max 1 bar (14.5 psi)
+ spring rate.