2.2
Installing positioner NP700/S1 on
Metso Automation actuators with
VDI/VDE 3845 mounting face
1. The actuator piston must be in the up position (in spring-return
actuators as determined by the spring).
2. Install the pointer (only B_U) parallel with the valve closure member
and fasten the draught piece (2) with a screw (29) to the pointer
cover (B_U) or to the coupling (QP), as shown in Fig. 5. Secure
the draught piece fastening screw with a sealant (e.g. Loctite) and
tighten it properly.
3. Fasten the mounting bracket (1) to the positioner.
4. Fasten the mounting bracket (1) to the actuator.
2.3
Installing positioner NP700/S2 on
Metso Automation Series B actuators
1. Run the actuator until the piston is in the top position (spring
return actuators in the position determined by the spring).
2. Set the direction arrow in the direction of the valve closure
member and attach the draught piece (2) to the indicator cover
in the position shown in Fig. 6. Secure the screw of the draught
piece e.g. with Loctite and tighten it sufficiently.
3. Attach the bracket (1) to the positioner. Please note the
washers (3).
4. Attach the bracket (1) to the actuator. Then push the
coupling (52) into the draught piece (2) in the position shown
in Fig. 3.
Note the differances in the installation between the B1C, B1J
actuator and B1JA actuators.
2.4
NP_700/700 positioner/limit switch
combination
The bottom of the limit switch acts also as the cover for the positioner.
Remove the limit switch before the adjustment of the positioner.
1. Loosen the cover screws. Note the position of the shaft relative
to the positioner when removing the limit switch.
2. When the adjustment of the positioner is done, operate the
actuator until the valve is in the closed or open position.
3. Note the position of the actuator and valve when mounting the
limit switch on the actuator. Make sure that the position of the
shaft is unchanged relative to the positioner.
4. Place the limit switch on the positioner so that the shafts are
correctly engaged.
5. Fasten the cover screws.
6. Check the adjustment of the limit switch. See the instruction
manual of the limit switch for details.
2.5
Piping of supply and signal air
Table 2 provides the recommended pilot valve and tube sizes in
accordance with the actuator sizes. Tube sizes are minimum values
allowed.
Connect air supply to S (1/4 NPT).
Connect C1 and C2 (1/4 NPT) to the actuator according to Fig. 4.
See also Chapter 3.
Connect signal air to IN (1/4 NPT).
NOTE:
A single action connection alone is permitted for positioners
mounted on the spring actuator!
Place a plug in connection C1 or C2. See Figure 7.
For pipe threads are liquid sealants, e.g. Loctite recommended.
NOTE:
Exessive sealant may cause faulty operation of the positioner.
Sealing tape is not recommended.
Ensure the cleanness of the air piping.
1
2
36
29
28
4
B
Fig. 5.
Installing on a Metso Automation actuator (S1)
hex screws (4)
wshers (3)
pointer cover
ear (2)
coupling (34)
positioner
mounting
bracket (1)
B1C or B1J actuator
B1JA actuator
Fig. 6.
Installing on a Metso Automation actuator (S2)
2
35
36
1
29
28
4
QP
5
