Effect of supply pressure
< 0.2 % / 10 kPa
(< 0.14 % / 1 psi)
Ambient temperature
-40 - +90 °C
(-40 - +185 °F)
Effect of temperature
< 0.07 % / °C
(< 0.025 % / °F)
Performance, measured using a cylinder
actuator with 12 % friction load
- dead band
< 0.3 %
- hysteresis
< 1.2 %
- linearity
< 2 %
Effect of vibration (1.5 g, 5-100 Hz)
< 1 %
Weight
approx. 1.5 kg / 3.3 lbs.
Construction materials
- case
anodized aluminium alloy
- cover
polycarbonate (standard model)
- internal parts
stainless steel,
aluminium alloy and
stainless spring steel
- diaphragm and seals
nitrile rubber (standard model)
1.5
Approvals
NP700/B construction has CENELEC EEx d IIC T5/T6 approval.
NP700/B1 construction has CSA Class I, Div. 1, Gr. B, C and
D approval and
FM Class I, Div. 1, Gr. B, C and D approval.
CENELEC = European Committee for Electrotehnical Standardization
CSA = Canadian Standards Association
FM = Factory Mutual
1.6
Recycling and disposal of a rejected
positioner
Most positioner parts can be recycled if sorted according to material.
Most parts have material marking. A material list is supplied with
the positioner. In addition, separate recycling and disposal instruc-
tions are available from the manufacturer. A positioner can also be
returned to the manufacturer for recycling and disposal against a
fee.
1.7
Safety precautions
CAUTION:
Do not exceed the positioner performance limitations!
Exceeding the limitations marked on the positioner may cause
damage to the posioner, actuator and valve.
Damage or personal injury may result.
CAUTION:
Do not dismantle a pressurized positioner!
Dismantling a pressurized positioner will result in uncontrolled
pressure release. Always isolate the relevant part of the pipeline,
release the pressure from the positioner and the piping.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of the moving parts when positioner is
operated!
2
M O U N T I N G O N T H E
METSO AUTOMATION ACTUATOR
2.1
General
When the positioner is supplied together with the valve and
actuator, the tubes are mounted and the positioner adjusted in
accordance with the customer’s specifications.
When the positioner is ordered separately, the mounting parts for
the assembly must be ordered at the same time.
Example order: Positioner alone (BC12)-Z-NP724.
The positioner is equipped with both VDI/VDE 3845 (S1) mounting
face and Metso Automation (S2) mounting face. Both mounting
faces require different shafts. S1: H coupling; S2: C coupling.
If limit switch NI700/S1 is mounted on an excisting actuator B_6-20 with
bracket 4216200, make sure that the shaft and draught piece can rotate
freely. Remove material from the bracket according to Fig. 4, if needed.
For mounting parts for Metso Automation actuators, see
Sections 13.2 - 13.5.
2
25
bracket 4216200
shaft
screw M5
ear, high
pointer cover
B1C/B1J/B1JA
Fig. 4.
Mounting with bracket 4216200
Positioner
type
Actuator
stroke volume
dm
3
(litres)
Air consumption
m
3
n
/h / scfm
*)
Max. delivery
m
3
n
/h / scfm
*)
NP729
0.3-1.0
0.4 / 0.2
12 / 7
NP723
0.3-10
0.6 / 0.3
12 / 7
NP724
1.0-8.0
0.6 / 0.3
12 / 7
NP726
8.0-30.0
0.9 / 0.5
18 / 10.4
NP727
> 30
1.8 / 1.0
32 / 18.6
*) supply pressure 4 bar / 60 psi
Table 1.
Pilot valve alternatives
4
