metso automation neles NP Series Operating and maintenance manual

POSITIONERS
Series NP
Installation, Maintenance and
Operating Instructions
7 NP 72 en
Issue 5/02

Table of Contents
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . 3
1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Operating principle . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Marking of positioner . . . . . . . . . . . . . . . . . . . . 3
1.4 Technical specifications . . . . . . . . . . . . . . . . . . . 4
1.5 Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . 4
2 MOUNTING ON THE
METSO AUTOMATION ACTUATOR. . . . 4
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Installing positioner NP700/S1 on Metso Automation
actuators with VDI/VDE 3845 mounting face. . 5
2.3 Installing positioner NP700/S2 on Metso Automation
B series actuators. . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 NP_700/700 positioner/limit switch combination 5
2.5 Piping of supply and signal air. . . . . . . . . . . . . . 5
2.6 Instrument air supply. . . . . . . . . . . . . . . . . . . . . 8
3 INPUT SIGNAL AND DIRECTIONS
OF OPERATION. . . . . . . . . . . . . . . . . . . . . . 8
3.1 Changeover piece . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Cam plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 PRELIMINARY ACTIONS FOR
THE ADJUSTMENT . . . . . . . . . . . . . . . . . . . 8
4.1 Position of the changeover piece . . . . . . . . . . 8
4.2 Pilot valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Position of the cam plate . . . . . . . . . . . . . . . . . 9
5 BASIC ADJUSTMENT . . . . . . . . . . . . . . . . . 9
6α0-ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . 9
7 SPLIT-RANGE ADJUSTMENT . . . . . . . . . 10
8 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 10
8.1 Supply air filter . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.2 Pilot valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.3 Replacement of the diaphragm . . . . . . . . . . . 11
9 TROUBLE SHOOTING . . . . . . . . . . . . . . . 11
10 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 11
10.1 NP700/GF and NP700GN
natural gas construction. . . . . . . . . . . . . . . . . . 11
10.2 NP700/R dust-proof construction (IP 65). . . 11
10.3 NP700/A with pressure gauges . . . . . . . . . . . 11
11 TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12 ORDERING SPARE PARTS. . . . . . . . . . . . 11
13 DRAWINGS AND PARTS LISTS . . . . . . . 12
13.1 Exploded view and parts list . . . . . . . . . . . . . . 12
13.2 Mounting parts for B1C6-502 and
B1J8-322 actuators (S1). . . . . . . . . . . . . . . . . . 14
13.3 Mounting parts for
Quadra-Powr actuators (S1) . . . . . . . . . . . . . 15
13.4 Mounting parts for B1C6-20 and
B1J8-20 actuators (S2). . . . . . . . . . . . . . . . . . . 16
13.5 Mounting parts for B1C25-502 and
B1J25-322 actuators (S2) . . . . . . . . . . . . . . . . 17
14 TYPE CODE . . . . . . . . . . . . . . . . . . . . . . . . 18
READ THESE INSTRUCTIONS FIRST!
These instructions provide information about safe handling and operation of the positioner.
If you require additional assistance, please contact the manufacturer or manufacturer’s representative.
Addresses and phone numbers are printed on the back cover.
SAVE THESE INSTRUCTIONS!
Subject to change without notice.
All trademarks are property of their respective owners
2

1 INTRODUCTION
1.1 General
The NP700 positioner is used for positioning double or single acting
actuator.
1.2 Operating principle
Operation is based on the force balance principle. One force is
caused by the signal pressure (IN) and acts on the diaphragm (8),
and the other is the compression force caused by the feedback
spring (60.1). The latter is directly proportional to the position of
the lower end of the spring, which is in turn dependent solely on
the position of the actuator shaft via the lever (33), the cam (29),
the positioner shaft (26) and the coupling (52).
When the equilibrium between the forces mentioned above is
disrupted, the beam (5) moves in the direction of the stronger force.
The end of the beam moves the spool (44.2) in the bore of the
body (44.1). When diverted from the equilibrium position, the spool
guides the supply air to one side of the actuator piston and the air
on the other side of the piston outside.
When the spool is in the equilibrium position the small volume of leakage
past the spool creates an equal pressure on either side of the unloaded
cylinder piston. This pressure is roughly 0,7 x the supply pressure.
If the signal pressure is altered, the spool moven out of the
equilibrium position and causes a pressure difference in the cylinder.
The piston moves in the direction of the difference pressure until
the compression force of the feedback spring generated by the
change in position is in equilibrium with the force generated by the
signal pressure.
Thus each signal pressure value corresponds to a single actuator
position. If an external force acts on the actuator shaft, the shaft
tends to move in the direction of the torque. This alters the position
of the spool via the feedback system so that the pressure difference
arising in the cylinder offsets the effect of the external torque.
Parts list for Figure 1:
Item Part
5 Beam
8 Diaphragm piston
26 Shaft
29 Cam plate
33 Lever
44.1 Pilot valve body
44.2 Pilot valve spool
46 Changeover piece
52 Coupling
60.1 Feed-back spring
60.3 Range adjustment
67 Zero adjustment
1.3 Marking of positioner
The positioner has an adhesive ID plate, see Fig. 2.
The ID plate contains the following information (from top to
bottom):
Full type designation of the positioner
Input signal
Max. supply presssure
Ambient temperature range
Manufacturing series number
An additional plate, Fig. 3, has markings:
Single action (S)
Filter regulator (-K)
Temperature range
1.4 Technical specifications
Signal pressure ranges 20-100 kPa / 0.2-1.0 bar
(3-15 psi)
Split ranges 20-60 kPa, 60-100 kPa
(3-9 psi, 9-15 psi)
Turning angle of feed-back shaft max. 90°
Relation between angle and signal linear
Supply pressure ps0.14-1 MPa
(20-145 psi)
5
52
26
C2
67
46
IN
C1
29
44.2
8
60.1
33
60.3
44.1
S
Fig. 1. Schematic diagram
Fig. 2. ID plate
Fig. 3. Additional plate
3

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 MOUNTING ON THE
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
dm3(litres)
Air consumption
m3n/h / scfm
*)
Max. delivery
m3n/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

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
236
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

Actuator Piping Operating time / stroke (s)
pilot valve
Plastic/Cu/SS (") Plastic/Cu/SS (mm)
B1C Stroke vol.
dm3/in3NPT 1/4 3/8 1/2 6/4 10/8 12/10 ø4LC ø4ø6ø6 HC
6 0.3/18 1/4 x x 1 1
9 0.6/37 1/4 x x 1,5 1,5
11 1.1/67 3/8 x x 2 2
13 2.3/140 3/8 x x 4
17
20
4.3/262
5.4/330
1/2 x
x
x
x
7
8,5
(6)
(5,5)
25
32
10.5/610
21/1282
1/2
3/4
x
x
(x)
(x)
x
x
(x)
(x)
10
17
(8,5)
(16)
40
50
43/2624
84/5126
3/4
1
(x)
(x)
x
x
x
x
(33)
(60)
31
57
502 195/11900 1 x x
B1J
B1JA
Stroke vol.
dm3/in3NPT 1/4 3/8 1/2 6/4 10/8 12/10
8
10
0.9/55
1.8/110
3/8 x
x
x
x
1,5/3 1,5/3
2,5/5,5
12
16
3.6/220
6.7/409
1/2 x
x
x
x
4,5/11
8/18
(3,5/6)
(4,5/11)
20
25
13/793
27/1648
3/4 x
x
(x)
(x)
x
x
(x)
(x)
8,5/21
17/38
(7,5/19)
(15/33)
32
322
53/3234
106/6468
1 (x) x
x
x
x
(33/74) 30/64
60/130
QP Stroke vol.
dm3/in3NPT 1/4 3/8 1/2 6/4 10/8 12/10
1 C 0.62/37 3/8 x x 1.5/2 1.5/2 - -
2 C 1.08/66 3/8 x x 2/3.5 2/3.5 - -
3 C 2.18/133 3/8 x x - 3/5 2/3 -
4 C 4.34/265 3/8 x x - 6/10 4/6 -
5 C 8.7/531 3/8 x x - - 7/10
6 C 17.5/1068 3/4 x x - 12/18 10/15
Times in parenthesis are achieved by changing pilot valve alone or pilot valve and tube size.
Table 2. Piping and operating times
Operating times for spring return actuators B1J/B1JA and QP:
against the spring / direction of the spring
Actuator without valve:
ps= 400 - 500 kPa / 58 - 72 psi
Step of input signal:
pi= 0-100% and 100-0%
6

NP727 / NE727
C2
C1 R
C2
C1 D
C2
C1 R
NP727 / NE727
C2
C1 D
C2
C1 R
NP727 / NE727
C2 C2
C1 C1
DR
NP727 / NE727
0-100
A
0-100
B
0-100
B
0-100
A
0-100
B
C2 C2
C1 DC1 R
DOUBLE-ACTING
1. Increasing input signal to open valve.
Cam segments:
B/0-100, A/0-50, A/50-100
2. Increasing input signal to close valve.
Cam segments:
A/0-100, B/0-50, B/50-100
NOTE:
Reverse piping for ST actuators.
SINGLE-ACTING
(SPRING TO CLOSE)
3. Increasing input signal to open valve.
Spring to close valve.
Cam segments:
B/0-100, A/0-50, A/50-100
4. Increasing input signal to close valve.
Spring to open valve.
Cam segments:
B/0-100, A/0-50, A/50-100
WARNING:
Valve closes exceptionally counterclockwise
Unsuitable for Q, R, T5, F and L series valve
NOTE:
Reverse piping for ST actuators. Spring and piston in
the opposite position from shown.
SINGLE-ACTING
(SPRING TO OPEN)
5. Increasing input signal to close valve.
Spring to open valve.
Cam segments:
A/0-100, B/0-50, B/50-100
NOTE:
Reverse piping for ST actuators. Spring and piston in the
opposite position from shown.
Fig. 7. Positioner actions
NOTE: In positioner NP727 the changeover piece can be used in position R only.
7

2.6 Instrument air supply
CAUTION:
Do not exceed the permitted actuator supply air
pressure!
The supply air must be clean, dry and oil-free instrument air, e.g.
according to standard ISA S7.3-81. Supply pressure is 0.14-1.0 MPa
/ 1.4-10 bar (20-140 psi).
3 INPUT SIGNAL AND DIRECTIONS
OF OPERATION
Figure 4 assists in choosing the right segment for the cam plate (29)
and position for the changeover piece (46).
3.1 Changeover piece
The function of connection C1 and C2 can be altered by turning
the changeover piece (46). The diagram D (or R) shown on the
protective plate (48) functions when the symbol D (or R) is
visible in the lower lefthand corner of the changeover piece (46).
D = direct, R = reverse.
External changes in the tubes are not needed. Positioner NP727 is
an exception (DIA6HC pilot valve). Then the changeover piece
must always be in position R and the external tubes mounted in
accordance with Fig. 7.
3.2 Cam plate
The figures marked on the cam plate (29) are the signal ranges
expressed as percentages, for example 0-100 corresponds to 20-100
kPa (3-15 psi), or 50-100 to 60-100 kPa (9-15 psi), see Fig. 8.
The arrows on the cam show the direction it must turn when the
input signal is rising in the cam segment in question.
The non-rising segments between the rising segments are
roughly 15-20º.
4 PRELIMINARY ACTIONS FOR THE
ADJUSTMENT
Set the valve’s open and closed limits with the actuator limiter screws; see
the valve instruction manual. The changeover piece (46) and the cam(29)
must be in correct positions. Check the pilot valve size from Table 2.
The adjustment must always be carried out when the supply
pressure has been changed.
Please note that operating of the valve is required during the
adjustment.
4.1 Position of the changeover piece
CAUTION:
Do not dismantle a pressurized positioner!
Choose the position of the changeover piece, D or R, from Fig. 7
in accordance with the function desired.
Turn the changeover piece (46) when necessary.
Loosen the nuts (49) and remove the protective plate (48). Pull out
the changeover piece (46). Check the O-rings (47, 2 pcs.) and apply
silicone grease lightly if needed. Place the changeover piece (46) and
the protective plate (48) in the case. Tighten the nuts (49) evenly,
one after the other.
NOTE:
Check that the changeover piece is mounted correctly: Sym-
bol D or R is visible in the lower left hand corner.
60-100 kPa (9-15 psi)
rising signal opens
60-100 kPa (9-15 psi)
rising signal closes
20-100 kPa (3-15 psi)
rising signal closes
20-100 kPa (3-15 psi)
rising signal opens
20-60 kPa (3-9 psi)
rising signal closes 20-60 kPa (3-9 psi)
rising signal
opens
segment C segment C
segment E
segment D
segment E ~ 15°
~ 15°
~ 15°
~ 15°~ 15°
~ 15°
Fig. 8. Input signal ranges
48
47 49
43
44
45
46
Fig. 9. Mounting the changeover piece
8

4.2 Pilot valve
Removal of the pilot valve is unnecessary when the changeover
piece is turned around. For instructions of removal, see Section 8.2.
4.3 Position of the cam plate
Choose the side, A or B, and the rising segment of the cam plate from
Fig. 4 in accordance with the function desired.
Move the actuator piston to the end where the input signal has its
lower value. Shut off the supply pressure or move the pilot spool
by deflecting the beam (5) gently so that the piston strokes to the
desired limit. The input signal should be zero or at the lower limit.
Loosen the screw (57), remove the indicator (32), loosen the screw (31)
and the locking wheel (30). Turn the cam plate (46) to the desired side.
In case of α0adjustment proceed acc. to Sections 6.1 and 6.2
Place the roller so that its contact point is 1 mm (0.04") from the beginning of
the rising segment. Then tighten the locking wheel (30) and the screw (31).
5 BASIC ADJUSTMENT
Basic adjustment is made to rotary and butterfly valves.
Please note the procedures in Chapter 4 before the adjustment.
1. Switch on the supply pressure (S) and the input signal (IN).
2. Set the input signal at the closed limit of the valve so that it
is 2 % i.e. 0.02 bar (0.2 psig) higher or lower than the limit value,
e.g. 0.2 + 0.02 = 0.22 bar (3 + 0.2 = 3.2 psig) or 1.0 - 0.02 = 0.98 bar
(15 - 0.2 = 14.8 psig). Loosen the screw (56). Turn the zero
adjustment screw (67) so that the actuator comes slowly to the
closed limit. Tighten the screw (56) always after the zero
adjustment. The valve should open slightly with a 4 % change in
signal, that is 0.03 bar (0.5 psig), e.g. 0.2 + 0.03 = 0.23 bar (3 +
0.5 = 3.5 psig) or 1.0 - 0.03 = 0.97 bar (15 - 0.5 = 14.5 psig).
See Figures 10 and 11.
3. Set the input signal to the other limit value. The valve should be
entirely open at 100 %, i.e. 1.0 bar (15 psig) or 0.2 bar (3 psig).
The valve should start to operate to closed direction at 98 %,
i.e. 0.98 bar (14.0 psig) or 0.22 bar (3.2 psig).
The range, i.e. turning angle, changes when the effective lenght
of the spring (60) is increased or decreased by turning the range
adjustment nut (60.3). See Fig. 11.
4. The zero and range adjustments affect each other, so stages 2
and 3 must be repeated a few times.
5. Screw on the pointer (32) into place so that the yellow line is in
the direction of the valve closing member. Tighten the screw (57).
6α0-ADJUSTMENT
α0adjustment is made to segment and ball valves. This adjustment
takes into account the "dead angle" α0 of the ball valve. The entire
signal range is then used for effective valve opening 90°-α0, see
Figure 12.
The same adjustment method can be applied to butterfly valves in
papermills for pulp flow control to avoid the dewatering of the pulp
near the closed position of the disc.
Table 3 shows the shift on the circumference of the cam equal to the
"dead angle" of the valve, Figure 13, in various cam segments (C, E, D).
Please note the procedures in Chapter 4 before the adjustment.
1. Mark the shift in question on the edge of the cam, Fig. 13 and
Table 3. Dimensions do not have to be measured if the dead angle
can be reliably noticed from position of the closing member.
2. Lock the cam plate (29) so that the roller touches the edge of the
cam at the mark. Tighten the locking wheel (30) and the screw (31).
3. Switch on the supply pressure (S) and the input signal (IN).
Rising input signal opens valve
Rising input signal closes valve
max 2 %
α0
safety range 2 %
α0
α0 adjustmentBasic adjustment
INPUT SIGNAL %
POSITION %
Fig. 10. Basic and α0adjustments
range
adjustment (60.3)
zero adjustment
(67)
screw (56)
range decreases
range increases
Fig. 11. Zero and range adjustments
α0= dead angle
Fig. 12. Dead angle
9

4. Set the input signal at the closed limit of the valve so that it
is 2 % i.e. 0.02 bar (0.2 psig) higher or lower than the limit value,
e.g. 0.2 + 0.02 = 0.22 bar (3 + 0.2 = 3.2 psig) or 1.0 - 0.02 = 0.98 bar
(15 - 0.2 = 14.8 psig). Loosen the screw (56). Turn the zero
adjustment screw (67) so that the actuator comes slowly to the
closed limit. Tighten the screw (56) always after the zero
adjustment. The valve should open slightly with a 4 % change in
signal, that is 0.03 bar (0.5 psig), e.g. 0.2 + 0.03 = 0.23 bar (3 +
0.5 = 3.5 psig) or 1.0 - 0.03 = 0.97 bar (15 - 0.5 = 14.5 psig).
See Figure 11.
5. Set the input signal to the other limit value. The valve should be
entirely open at 100 %, i.e. 1.0 bar (15 psig) or 0.2 bar (3 psig). The
valve should start to operate to closed direction at 98 %, i.e. 0.98
bar (14.0 psig) or 0.22 bar (3.2 psig).
The range, i.e. turning angle, changes when the effective lenght
of the spring (60) is increased or decreased by turning the range
adjustment nut (60.3). See Fig. 11.
6. The zero and range adjustments affect each other, so stages 4
and 5 must be repeated a few times.
7. Screw on the pointer (32) into place so that the yellow line is in
the direction of the valve closing member. Tighten the screw (57).
7 SPLIT-RANGE ADJUSTMENT
In principle, split range adjustments are made in the same manner
as for a normal signal range. Select a split range, 0.2-0.6 bar (3-9 psig)
or 0.6-1 bar (9-15 psig), from the cam plate. See Figure 8.
8 MAINTENANCE
CAUTION:
Do not dismantle a pressurized positioner!
NOTE:
Ensure the cleanness of the air piping.
Regular maintenance is not necessary.
The need for maintenance depends on the quality of the instrument
air, see Section 2.5.
If there is need for servicing proceed according to the following
sections.
8.1 Supply air filter
The supply air filter (50) is located in the supply air connection (S),
the filter can be removed and cleaned with e.g. compressed air.
segment C
segment D
segment E
shift
Roller contact point when
the ball is completely closed
Fig. 13. Shift on circumference of cam equal to dead angle
α0Segment C Segment E Segment D
20°
19°
18°
17°
16°
15°
14°
13°
12°
11°
10°
9°
8°
7°
6°
5°
4°
*)
*)
*)
*)
*)
3.1/0.12
2.9/0.11
2.7/0.10
2.5/0.09
2.3/0.09
2.1/0.08
1.9/0.07
1.7/0.06
1.5/0.05
1.3/0.05
1.1/0.04
0.9/0.03
6.1/0.24
5.8/0.22
5.5/0.21
5.2/0.20
4.9/0.19
4.6/0.18
4.3/0.16
4.0/0.15
3.7/0.14
3.4/0.13
3.1/0.12
2.8/0.11
2.5/0.09
2.2/0.08
1.9/0.07
1.6/0.06
1.3/0.05
8.1/0.31
7.7/0.30
7.3/0.28
6.9/0.27
6.5/0.25
6.1/0.24
5.7/0.22
5.3/0.20
4.9/0.19
4.5/0.17
4.1/0.16
3.7/0.14
3.3/0.12
2.9/0.11
2.5/0.09
2.1/0.08
1.7/0.06
*) Segment C: α0max. 15°
Table 3. Shift caused by dead angle, mm/inch
Valve size
Valve series
MBV
QMBV
1)
MBV
QMBV
2)
D
3)
T5,
QT5
QX-
T5
T25,
QT25
QX-
T25
R,
QR
mm in Dead angle in degrees
25
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
650
700
750
800
900
1
1 1⁄2
2
2 1⁄2
3
4
5
6
8
10
12
14
16
18
20
24
26
28
30
32
36
12.5
11.0
9.0
8.0
9.0
9.0
11.0
9.0
8.0
8.0
7.0
-
-
8.0
-
7.0
7.0
-
7.0
6.5
6.5
5.5
5.4
4.5
-
-
12.0
-
11.0
11.0
-
10.5
7.5
7.0
5.5
5.5
5.0
5.0
5.5
5.0
6.0
6.0
5.5
-
4.5
23.0
22.0
22.0
-
16.0
15.0
-
14.5
11.0
12.0
8.5
-
8.5(14")
7.0(16")
17.5
11.0
11.0
-
7.0
7.5
-
8.0
6.0
-
-
16.0
-
15.0
14.5
11.0
12.0
8.5
8.5
7.0
-
-
7.0
-
8.0
8.0
6.0
14
11
15
11
8
7
7
7
6
6
5
4
4
1) Seat supported 2) Trunnion
3) S/G seat
Table 4. Dead angle in degrees
10

8.2 Pilot valve
Remove the pilot valve (44) by first loosening the nuts (49) and then
by lifting off the protective plate (48), the changeover piece (46)
and the gasket (45).
The pilot valve spool (44.2) should slip easily in the pilot valve
body (44.1).
If the pilot valve sticks, wash the body and spool with solvent.
NOTE:
The pilot valve body and spool constitute a pair, and must not
be replaced separately.
See the exploded view for the correct installation position of the
pilot valve. The size code for the pilot valve on the body, for example
DIA 4.0, must be visible on the right side.
Check the condition of the O-rings (43, 47) and of the gasket (45). The
end of the leaf spring on the beam must be on top of the pilot valve spool,
Figure 11. Make sure that the end of the beam (5) goes into the spool
groove without sideways deflections. After tightening the nuts (49), check
the beam once again by hand to see that the pilot valve moves readily.
8.3 Replacement of the diaphragm
Remove the feedback spring (60), loosen the screws (23) and
remove the screw (15). Replace the diaphragm (14).
Note the correct installation position for the diaphragm, with the
convolution downward. See Figure 14.
Check the condition of the washer (55) when assembling and secure
the upper spring plate (16) with e.g. Loctite. Check that the O-ring
(11) is in place. Tighten the cover screws (23) evenly. The positioner
adjustment should be checked after replacement of diaphragm.
Note. O-ring (11) in the old construction only (manufactured
before 12/94).
9 TROUBLE SHOOTING
1. Signal pressure change does not affect actuator position
supply pressure too low
signal pressure tubes leak
diaphragm damaged
pilot valve sticks
changeover piece seals leak
tube installations between positioner and actuator,
changeover piece or cam position wrong, see Fig. 4
actuator or valve jammed
2. The actuator reaches final position with a small signal pressure
change
the tube installation between positioner and actuator, the
changeover piece or the cam position wrong.
3. Inaccurate positioning
pilot valve dirty
beam (5) pushes pilot valve spool sideways
diaphragm damaged
actuator torque too low
supply pressure too low
valve torque requirement increased
4. Overshooting or too slow positioning
pilot valve dirty or wrong size, see Table 2
supply air tube too small or supply air filter dirty
valve sticks
10 OPTIONS
10.1 NP700/B and NP700/B1
Equipped with a flameproof enclosure I/P converter.
To be adjusted like for standard posioners. Do not make any
adjustments for the I/P converter!
10.2 NP700/GN natural gas construction
For clean "sweet" natural gas instead of compressed air. Like standard
construction but with 3/4 NPT exhaust port.
Please note: do not remove the exhaust port (4).
10.3 NP700/R dust-proof construction (IP 65)
For extremely dusty environments. The protective cover (3) behind
the standard posioner is replaced with an exhaust port. The port
has a 3/4 NPT filter.
Please note: do not remove the exhaust port (3).
10.4 NP700/A with pressure gauges
A standard positioner can be equipped with a pressure gauge block.
The block (70) is attached with tree sef-tapping screws (72). The
O-rings (71, 3 pcs.) must be in position before mounting. Check
tightness after mounting.
For all other constructions see Type Code, Chapter 14.
11 TOOLS
In addition to standard general tools, you need the following
equipment:
calibration device for adjustments
12 ORDERING SPARE PARTS
When ordering spare parts, always include the following informa-
tion: Type code (from ID plate)
ID code of the spare part (from spare part leaflet),
description and quantity
NOTE:
gap required
5
55
11 14 15 22 23
16
60
Fig. 14. Replacement of diaphragms
11

13 DRAWINGS AND PARTS LISTS
13.1 Exploded view and parts list
12

Item Qty Description Recommendedsparepart
1 1 Housing assy
21Cover
3 1 Protective cover
1Exhaustport
41Screw
51Beamassy
61Plate
72Screw
8 1 Lower diaphragm plate
10 1 Upper diaphragm plate
13 *) 1 O-ring X
14 1 Diaphragm X
15 1 Screw
16 1 Upper spring plate
18 3 O-ring X
22 1 Diaphragm cover
23 3 Screw
26 1 Shaft assy
27 1 Washer
28 1 O-ring X
29 1 Camplate
30 1 Locking wheel
31 1 Screw
32 1 Pointer
33 1 Lever assy
34 1 Retaining ring X
37 1 I/P converter
43 1 O-ring X
44 1 Pilot valve assy X
45 1 Gasket X
46 1 Changeover pice
47 2 O-ring X
48 1 Protective plate
49 2 Hexagon nut
50 1 Filter
51 2 Bearing
Item Qty Description Recommended spare part
52 1 Coupling
55 1 Gasket X
56 1 Screw
57 1 Grub screw
58 1 Support plate
59 2 Barrel nut
60 1 Spring
62 1 Hexagon plug
64 1 Body
65 1 Lock ring
67 1 Zero screw
68 2 Spring
69 2 Guide
70 1 Pressure gauge block
71 3 O-ring X
72 3 Screw
73 1 Pressure gauge
74 2 (1) Pressure gauge
75 1 Pressure gauge
76 1 Double fitting
77 1 Filter regulator
78 1 Reduction fitting
79 1 Pressure gauge
86 1 Adapter plate
87 2 Washer
88 2 Screw
98 2 Screw
99 2 Spring plate
100 1 Additional plate
101 2 O-ring
105 1 ID plate
109 1 Seal X
110 4 Screw
115 2 Washer
116 2 Screw
*) Only in positioners manufactured before 12/94
13

13.2 Mounting parts for B1C6-502 and
B1J8-322 actuators (S1)
Item Qty Description
1 1 Mounting bracket
2 1 Draught piece
34 Washer
44 Screw
28 1 Screw
29 2 Screw
36 1 Coupling jacket
14

13.3 Mounting parts for
Quadra-Powr actuators (S1)
Drive: male
Item Qty Description
1 1 Mounting bracket
2 2 Coupling half
31 Adapter
44 Screw
5 4 Hex nut
61 Screw
74 Screw
84 Washer
94 Screw
10 4 Washer
Drive: female spline
Item Qty Description
1 1 Mounting bracket
21 Ear
44 Screw
28 4 Screw
29 1 Screw
30 (4) Screw
35 1 Coupling
36 1 Coupling jacket
15

13.4 Mounting parts for B1C6-20 and
B1J8-20 actuators (S2)
Item Qty Description
1 1 Mounting bracket
2 1 Draught piece
32 Washer
42 Screw
51 Bracket
61 Washer
71 Screw
82 Washer
10 1 Rod
11 2 Bushing
12 2 Screw
13 2 Stud (B1C6 only)
14 2 Hexagon nut (B1C6 only)
26 2 Locking nut
27 2 Washer
28 2 Screw
16

13.5 Mounting parts for B1C25-502 and
B1J25-322 actuators (S2)
Item Qty Description
1 1 Mounting bracket
2 1 Draught piece
32(4) Washer
42(4) Screw
82 Washer
92 Screw
10 1 Rod
11 2 Bushing
12 2 Screw
26 2 Locking nut
27 2 Washer
28 2 Screw
17

14 TYPE CODE
PNEUMATIC POSITIONER NP 700
1. 2. 3. 4. 5. 6.
NP 7 2 4 S / S1 K
1. sign PRODUCT GROUP
NP Pneumatic positioner
2. sign SERIES CODE
3. sign INPUT SIGNAL RANGE
04-20 mA, only with options B and B1 (6th sign).
220-100 kPa (0,2-1,0 bar/3-15 psig)
4. sign PILOTVALVE
SIZE
CONNECTIONS
S, C1, C2
3Ø4 mm LC 1/4 NPT
4Ø4 mm 1/4 NPT
6Ø6 mm 1/4 NPT
7Ø6 mm HC 3/8 NPT
9Ø4 mm LC
3-way pilot valve, single
action, applicable only
with B1J 8, QP 1, QP 2
and DA/RA. 5th sign
always S or A.
1/4 NPT
5. sign ACTION
Double action, without sign.
SSingle action, specified in the option sticker.
ASingle action, linear motion
applicable only to Metso Automation D/R series
diaphragm actuator, max. stroke 57 mm (2 1/4 in).
6. sign OPTIONS
Standard (IP 54 enclosure).
6th sign S1 or S2 always to be defiened.
Temperature range -40 ˚C - +90 ˚C/ -40 ˚F - +194 ˚F.
BFlameproof enclosure I/P converter (IP65),
BVS-approval,EEx d IIC T6.Input signal range 4-20 mA.
M20x1.5 conduit entry. 3rd sign always 0.
Temperature range -40 ˚C - +55 ˚C/ -40 ˚F - +131 ˚F.
B1 Flameproof enclosure I/P converter (IP65),
FM/CSA-approval,Class 1,Div.1,Groups B,C,D.
Input signal range 4-20 mA. 1/2 NPT conduit entry.
3rd sign always 0.
Temperature range -40 ˚C - +55 ˚C/ -40 ˚F - +131 ˚F.
GN For natural gas. Exhaust adapter, 3/4 NPT thread.
Not usable inside with options B and B1.
RWater and dustproof enclosure IP65/NEMA 4 and 4X.
Not available with option GN.
HHigh temperature construction. Viton diaphragm and
seals. Not available with options B, B1, A, A1 and K.
Temperature range -10 ˚C - +120 ˚C/ +14 ˚F - +248 ˚F.
S1 Positioner with attachment face acc. to standard
VDI/VDE 3845, equipped with H-clip. When
positioners are separate deliveries, VDI/VDE ear is
supplied.
Not applicable to globe valve actuators (5th sign A).
S2 Positioner with attachment face acc.to Metso
Automation, equipped with C-clip.
Not applicable to globe valve actuators (5th sign A).
Used only with non-MA limit switches, etc..
J7 Octagonal shaft and special mounting kit.
J30 Square shaft and special mounting kit
APressure gauges, scale bar/psi/kPa, basic material
brass, nickel plated, housing stainless steel, glycerine
filled. 5th sign always to be defined.
Temperature range -40 ˚C - +70 ˚C/ -40 ˚F - +158 ˚F.
A1 By-pass, 20-100 kPa/0.2-1.0 bar/3-15 psig. Only for
single action diaphragm actuator. Pressure gauges,
scale bar/psi/kPa, basic material brass, nickel plated,
crust stainless steel,glycerine filled. 5th sign always A.
Temperature range -40 ˚C - +70 ˚C/ -40 ˚F - +158 ˚F
QAluminium cover, rised position pointer
YSpecial construction.
CSpecial cam.
EXTERNAL CONNECTION
PARTS
KFilter regulator for supply air type BELLOFRAM 51FR.
Pressure gauge, scale bar/psi/kPa, basic material brass,
nickel plated, housing stainless steel, glycerine filled.
Temperature range -18 ˚C - +52 ˚C / -10 ˚F - +125 ˚F.
Filter size 5 µm.Not available with HC-pilot (4th sign 7)
Specified in the option sticker.
In connection with the Ø6 HC-pilot valve (4th sign 7)
must be used large capacity filter regulator (not K)
for actuator bigger than B1C 40 and B1J 32.
Installation with mounting bracket.
LM20x1.5 / 1/2 NPT conduit entry nipple.
EEx d IIC-approval. Available only with option B.
Specified in the option sticker
18

Metso Automation Inc.
Europe, Levytie 6, P.O. Box 310, 00811 Helsinki, Finland. Tel. [phone]. Fax [phone]
North America, 44 Bowditch Drive, P.O. Box 8044, Shrewsbury, MA 01545, USA. Tel. [phone]. Fax [phone]
Latin America, Av. Independéncia, 2500- Iporanga, 18087-101, Sorocaba-São Paulo, Brazil.
Tel. [phone]. Fax [phone]
Asia Pacific, 501 Orchard Road, #05-09 Wheelock Place, 238880 Singapore. Tel. [phone]. Fax [phone]
Middle East, Roundabout 8, Unit AB-07, P.O. Box 17175, Jebel Ali Freezone, Dubai, United Arab Emirates.
Tel. [phone]. Fax [phone]
www.metsoautomation.com