BLX v100 positioner Instructions de montage
CONTENTS
1 INTRODUCTION............................................... 2
1.1 General .................................................... 2
1.2 Function ................................................... 2
1.3 Product Identification ............................... 3
1.4 Air quality recommendations ................... 3
1.5 Safety Instructions ................................... 4
2 INSTALLATION ................................................ 5
2.1 Connections............................................. 6
2.2 General mounting instructions ................ 6
2.2.1 Mounting on rotary actuators .................. 6
2.2.2 Mounting on linear actuators ................... 6
2.3 Installation instructions
for rotary actuators .................................. 7
2.3.1 Double acting ........................................... 7
2.3.2 Single acting ............................................ 7
2.4 Installation instructions
for linear actuators ................................... 8
2.4.1 Double acting........................................... 8
2.4.2 Single acting ............................................ 8
2.5 Cam ......................................................... 9
2.5.1 Adjustments ............................................. 9
2.5.2 Cam specifications .................................. 9
2.6 4-20 mA connection ................................ 10
2.6.1 Connecting the control signal .................. 10
2.6.2 Checking the control signal ..................... 10
2.6.3 Bench test with calibrator ........................ 10
2.7 Calibration ............................................... 11
3 MAINTENANCE ............................................... 12
3.1 Front cover and Indicator ......................... 12
3.2 Pilot valve ................................................ 13
3.3 I/P-converter, type EA1 ........................... 14
3.4 Filter ......................................................... 15
3.5 Membrane ............................................... 16
3.6 Feed back spring, changing .................... 17
3.7 Feed back spring, disassembly ............... 18
3.8 Balance arm ............................................ 19
3.9 Guide arm, changing ............................... 20
3.10 Guide arm, disassembly .......................... 21
3.11 Drive shaft ............................................... 22
3.12 Drive ........................................................ 23
3.13 Safety valve ............................................. 24
4 CONVERTING .................................................. 25
4.1 V100P to V100E ...................................... 25
5 SPARE PARTS ................................................. 26
5.1 Exploded drawing .................................... 26
5.2 Spare parts list ........................................ 27
6 TECHNICAL INFO ............................................ 28
6.1 Specifications .......................................... 28
6.2 Dimensions .............................................. 29
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V100 Positioner
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Thank you for choosing the BLX V100 positioner
1.2 Function
The V100 utilizes the force balance principal of
operation.
The desired value, in the form of pressure, affects
the membrane(1) with the force that is created
transferred to the balance arm(2).
The opposing force, which represents the actual
value, is provided by the feedback spring(5) and
works in the opposite direction on the balance
arm(2).
The feedback spring, resting on the guide arm(3),
is positioned by the shape and response of the
cam.
The cam(4) is connected to the cylinder’s (actua-
tor) piston rod via the drive.
BLX V100 corrosion resistant painting and sealing
meet NEMA 4X as well as the sealing requirement
IP 66.
BLX V100 is furnished standard with four connect-
tions for gauges and a threaded opening for venting
the positioner’s exhaust.
The BLX R100 feedback unit for the V100 is
offered as an accessory (see separate manual).
1. INTRODUCTION
1.1 General.
BLX V100 is a compact, modular positioner for both
rotary and linear actuators, double or single acting.
There are two basic types:
V100P for a pneumatic signal and
V100E for a current signal.
BLX V100 has independent zero and span
adjustments, making calibration very simple.
External access for zeroing is standard.
The pilot valve(6) is connected to the balance arm
and follows the balance arm’s movement.
The system is stable when the spool(7) is in the
neutral position and the forces that affect the
balance arm is in equilibrium.
As soon as a signal change or a change in the
position of the piston rod occurs, the force balance
is also changed and the spool moves. Air immedi-
ately begins to flow into the part of the cylinder
(C+ or C-) which allows the feedback mechanism
to return the spool to the neutral position.
The system is self-stabilizing and searches for
equilibrium.
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V100 Positioner
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1.4 Air quality recommendations
Poor air quality is one of the causes of premature
functional problems with pneumatic and electro-
pneumatic equipment. The pilot valve and I/P-
converter are precision instruments and are there-
fore the most sensitive parts of the positioner.
a) Water in the supply air is a natural occurrence.
This happens when air is compressed. The com-
pression heats the air and the natural degree of
water in the air can remain as moisture.
When the air cools in pipes etc. the moisture
condenses and becomes liquid water.
Large quantities can build and sometimes flood
small water separators. This excess water will
eventually reach the control valve and positioner.
This can cause corrosion damage to the I/P con-
verter, causing the unit to malfunction.
We strongly recommend the use of water separat-
ors with adequate capacity. Coalesing filters from a
reputable manufacturer is an inexpensive way to
help prevent unit malfunctions or failures and add
life to the product. These filters remove particles
and moisture from air lines.
1.3 Product identification
The V100 has two identification tags, the serial
number tag(1), and the product model tag(2).
The latter contains information on control
signal, maximum working pressure and temp-
erature ranges.
Other information can be shown depending on
the model.
b) Oil in the supply air usually is from the main com-
pressor. Oil can clog the small nozzles and disturb
the flapper in the I/P-converter. It can also cause the
spool to “drag” within the pilot valve.
The result is poor control or in the worst case, failure.
c) Particles in the air usually occur because of corros-
ion. Dirt and particles can block the small nozzles of
the I/P-converter. They can also cause the pilot valve
to malfunction. The unit may completely fail.
To ensure normal operational safety with BLX posit-
ioner products, we recommend that a water separator
and a <80 micrometer filter are mounted as close to
the product as possible.
If larger amount of oil is present an oil separator
should be installed as well.
To further increase operational safety, we recommend
that the working air is clean, dry and free of moisture,
water, oil, particles and other contaminants, in accord-
ance with the international standard ISA S7.3-81.
The serial number tagThe product model
tag for V100P
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V100 Positioner
1.5 Safety Instructions
CAUTION: Beware of moving parts when positioner is operated!
CAUTION: Beware of parts with live voltage!
A voltage, which is normally not dangerous, is supplied to the positioner.
Avoid touching live parts and bare wires as well as short circuting live parts
and the housing.
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: Do not exceed the positioner performance limitations!
Exceeding the limitations marked on the positioner may cause damage to
the positioner, actuator and valve.
Damage or personal injury may result.
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V100 Positioner
2. INSTALLATION
2.1 Connections
S– Supply air
V100P: max. 145 PSI / 1 MPa
V100E: 23 - 145 PSI / 0,15 -1 MPa
IP– Input, pressure signal
V100P: 3-15 PSI / 20-100 kPa
V100E: Plugged
IE– Input, current signal
V100E: 4-20 mA (Ri max 250 ohm)
V100P: Plugged
C+ - Cylinder connection + stroke
C- - Cylinder connection – stroke
EXHAUST - All air from the cylinder, I/P and
positioner is vented through this port.
Air connections
for male 1/4" NPT or G 1/4".
Gauge connections
for male 1/8" NPT or G 1/8".
Cable entry
for male 1/2" NPT, PG 13.5
or M20 cable fitting.
The appropriate threads are clearly indicated by
the markings on the housing.
Gauge ports I , C+ , C- and Sare factory
plugged. Remove the plugs and replace with
gauges.
Liquid sealant for threads,
Loctite or similar, is recom-
mended for all air connections.
The IPconnection must
be plugged in V100E
The IEconnection should
be plugged in V100P
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V100 Positioner
2.2 General mounting instructions.
The V100 has the ISO F05 hole pattern(1)
for mounting kits.
2.2.1 Rotary actuator
The BLX V100 has a very stable and pro-
perly sized drive shaft bearing.
However, the positioner drive(A) should
be aligned properly to the rotary actuator
spindle(B). A relatively small error com-
bined with a rigid coupling can create
very
powerful radial forces, which can in turn
overload and in short time wear out even
the very best drive shaft bearing.
2.2.2 Linear actuator
When mounting on linear actuators, the
positioner should be attached in such a
way that its drive is in the center of the
actuator’s stroke. Proper installation and
alignment will minimize linearity error.
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V100 Positioner
A
B
D
C
EF
2.3 Installation instructions for rotary actuators
2.3.2 Single acting
2.3.1 Double acting
Signal closes
Signal opens
Direct (CCW)
Reverse (CW)
Spring closes Direct (CCW)Spring opens Reverse (CW)
Signal closes Signal opens
Spring opens Direct (CCW) Spring closes Reverse (CW)
Signal opens Signal closes
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V100 Positioner
GH
IJ
KL
N
M
Signal opens Signal closes
2.4 Installation instructions for linear actuators
2.4.1 Double acting
Direct (CCW)
Signal closes Signal opens
Reverse (CW)
2.4.2 Single acting
Spring opens Spring closes
Direct (CCW)
Spring opens Spring closes
Reverse (CW)
Signal opens Signal closes
Signal closes Signal opens
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V100 Positioner
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