Metso NB723, Installation, Maintenance And Operation Instructions

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4 7 NP 72 en
1.4 Technical specifications
Signal pressure ranges 20-100 kPag, 0.2-1.0 barg,
(3-15 psig)
Split ranges 20-60 kPag/60-100kPag,
0.2–0.6 barg/0.6–1.0 barg,
(3–9 psig, 9–15 psig)
Turning angle of feed-back shaft max. 90°
Relation between angle and signal linear
Supply pressure ps 140-1000 kPag, 1.4–10 barg
(20–145 psi)
Effect of supply pressure < 0.2 % / 0.1 bar
(< 0.14 % / 1 psi)
Ambient temperature -40° to +90 °C
(-40° to +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 lb
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 Stand-
ardization
CSA = Canadian Standards Association
FM = Factory Mutual
1.6 Recycling and disposal
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 instructions are available from the manufac-
turer. A positioner can also be returned to the manufacturer
for recycling and disposal against a fee.
1.7 Safety precautions
2 MOUNTING ON THE METSO 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 VDI/VDE 3845 (S1) mount-
ing face.
This mounting face requires a shaft with the H coupling.
Old Metso Automation mounting face (S2) is no more avail-
able.
For mounting parts for Metso actuators, see Sections
13.2–13.3.
Table 1 Pilot valve alternatives
Positioner
type Actuator
stroke volume
dm
3
(litres)
Air
consumption
nm
3
/h / scfm *)
Max. delivery
nm
3
/h / scfm *)
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
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 uncon-
trolled 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 oper-
ated!