Flowserve 1400 User Manual
Valtek Logix 1400
Digital Positioner
GENERAL INFORMATION
The following instructions are designed to assist in
unpacking, installing and performing maintenance as
required on Valtek® Logix™ 1400 digital positioners.
Series 1000 is the term used for all the positioners herein;
however, specific numbers indicate features specific to
a model (i.e. Logix 1400 digital positioner indicates that
the positioner uses FOUNDATION™ fieldbus protocol). Prod-
uct users and maintenance personnel should thoroughly
review this bulletin prior to installing, operating, or performing any maintenance on the valve.
More detailed operation instructions are included in other
manuals in the owner’s manual binder; refer to them
when more information is needed.
Separate Flowserve Installation, Operation, Maintenance
instructions cover the valve (IOM 1 or IOM 27) and
actuator (IOM 2 or IOM 31) portions of the system and
other accessories. Refer to
Installation & Reference Guide
implementation. Refer to the appropriate instructions
when this information is needed.
To avoid possible injury to personnel or damage
to valve parts, users must strictly adhere to
WARNING and CAUTION notes. Modifying this
product, substituting non-factory or inferior parts,
or using maintenance procedures other than
outlined could drastically affect performance or
be hazardous to personnel and equipment and
may void existing warranties.
Logix 1400 Digital Positioner
for details on fieldbus
WARNING: Standard industry safety practices must
be adhered to when working on this or any other
process control product. Specifically, personal
protective and lifting devices must be used as
warranted.
Unpacking
1. While unpacking the Logix 1400 positioner, check
the packing list against the materials received. Lists
describing the system and accessories are included
in each shipping container.
2. When lifting the system from the shipping container,
position lifting straps in a way that avoids damaging
mounted accessories. Systems with valves up to
six inches may be lifted by actuator lifting ring. On
larger systems, lift unit using lifting straps or hooks
through the yoke legs and outer end of body.
WARNING: When lifting a valve/actuator assembly with lifting straps, be aware the center of
gravity may be above the lifting point. Therefore,
support must be given to prevent the valve/
actuator from rotating. Failure to do so can cause
serious injury to personnel or damage to nearby
equipment.
3. In the event of shipping damage, contact the shipper
immediately.
4. Should any problem arise, contact a Flowserve
representative.
Valtek Part No. 164713 46-1
Table of Contents
General Information .................................................... 1
Unpacking .................................................................. 1
Logix 1400 Digital Positioner Overview ...................... 2
Specifications ............................................................. 3
Positioner Operation ................................................... 3
Tubing Positioner to Actuator ..................................... 4
Wiring and Grounding Guidelines ................................ 4
Driver Module Assembly ............................................. 5
Spool Valve Cover ...................................................... 6
Regulator .................................................................... 7
Internal Coalescing Filter ............................................ 7
Main PCB Assembly .................................................. 7
Collector Board ........................................................... 7
Field Terminations ...................................................... 8
Stem Position Sensor................................................. 8
LED Indicators ............................................................ 9
Re-Cal Button ............................................................. 9
Checking or Setting Internal Regulator Pressure ...... 10
Checking or Setting the Driver Module
Minimum Pressure ............................................... 10
Linear Mark I Valve Mounting................................... 11
Standard Rotary Mounting Procedure ....................... 12
Optional Rotary Mounting Procedure ........................ 13
Troubleshooting the Logix 1400 Digital Positioner .... 13
Theory of Operation.............................................. 13
Mounting and Installation ......................................... 15
Calibration ................................................................ 16
Control and Tuning ................................................... 16
Alarms ...................................................................... 18
Alerts ........................................................................ 19
Travel Accumulator .................................................. 20
Cycle Counter ........................................................... 20
Position Deviation ..................................................... 20
Advanced Features .................................................. 20
Glossary and Definitions ........................................... 23
Transducer Block Signature Parameters .................. 24
Exploded View of Positioner..................................... 27
Available Spare Parts Kits ....................................... 28
Troubleshooting Tables ............................................ 29
Positioner Mounting Kits........................................... 32
Logix 1400 Digital Positioner
Logix 1400 Digital Positioner Overview
The Logix 1400 digital positioner is a two-wire, FOUNDATION
fieldbus compliant, digital valve positioner. The Logix
1400 digital positioner also utilizes the fieldbus protocol
to allow two-way remote communications with the positioner. The Logix 1400 digital positioner can control both
double- and single-acting actuators with linear and rotary
mountings.
Since the positioner is insensitive to supply pressure
changes and can handle supply pressures from 35 to 150
psig, a supply regulator is usually not required; however,
an air filter is required due to the close clearances in the
spool assembly.
NOTE: The air supply should conform to ISA Standard
S7.3 (a dew point at least 18° Fahrenheit less than
ambient temperature, particle size below one micron, and
oil content not to exceed one part per million).
46-2 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Specifications
Electrical Specifications
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Positioner Operation
The Logix 1400 positioner is an electric feedback instrument. Figure 1 shows a Logix 1400 positioner installed on
a double-acting actuator for air-to-open action. Positioning is based on a balance of two signals: one proportional
to the command input signal and the other proportional to
the valve stem position.
The supply pressure for the positioner pressure modulator is tapped off the main supply and is filtered as it
passes through a field-replaceable, coalescing filter
element in the module. This air passes through an
internal pressure regulator that regulates it to approximately 22 psig. The air then passes through an orifice
that restricts the flow and air consumption.
The pressure modulator further controls the air from 6-12
psig, using a spring-diaphragm flapper that is attracted
by an electromagnet to a nozzle. A temperature compen-
sated hall effect sensor mounted on a circuit board
senses the spool valve position. The hall effect sensor
and circuitry create an inner feedback loop, which determines how much current to send to the electromagnet for
a desired spool valve position. The electromagnet in the
feedback loop varies the nozzle-flapper spacing, which
regulates the output pressure between 6 and 12 psig,
proportional to the digital positioning algorithm.
When the command and stem position signals are equal,
the system will be in equilibrium and the valve stem will
be in the position called for by the command signal. If
these opposing signals are not equal, the spool valve will
move up (or down) and, by means of the pressure
modulator, change the output pressures and flow rate.
This will cause the actuator piston to move until the
signal of the position sensor equalizes with the
command signal.
46-3Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Air-to-Open
Configuration
Flame Arrestors
Spool Valve
Exhaust
OUTPUT 1
Collector Board
Pressure Sensor
Air Supply
Digital Position
Algorithm
LED
Dis-
play
OUTPUT 2
Exhaust
OO
Stem Position Sensor
Hall Effect Sensor
Electromagnetic Coil
Nozzle
Flame
Arrestor
Figure 1: Logix 1000 Digital Positioner Schematic
Detailed Sequence of Positioner Operations
The positioner operates on a pressure equilibrium principle with a spool valve apportioning supply to the
actuator. An increase in the command signal causes the
modulator pressure to increase, pushing the spool assembly upward from its equilibrium position. This opens
the spool valve ports, supplying air to output 1 and
exhausting air from output 2. This causes the actuator
piston to move upward.
The upward motion of the piston is transmitted back to
the positioner through the stem-position feedback linkage. The piston continues to stroke upward until the
stem-position signal of the sensor increases sufficiently
to counter the command signal being sent to the control
algorithm. At this point, the spool is at its equilibrium
position as the pressures in the cylinder stabilize and the
air flow to the actuator decreases. The computer will then
make small adjustments to fine-tune the desired position
and compensate for changes in dynamic loading.
A decrease in the command signal reverses the
described actions, causing a proportional downward
movement of the actuator piston and stem.
Tubing Positioner to Actuator
Proper tubing orientation is critical for the positioner to
function correctly and have the proper failure mode.
Referring to Figure 1 note that for air-to-open valves, the
output 1 port of the positioner manifold is tubed to the
bottom side of the actuator. The output 2 port of the
Main PCB Tray
Ribbon Cable
Flame Arrestor
Filter
Regulator
Orifice
Flapper
positioner manifold is tubed to the top side of the
actuator. For air-to-close valves the above configuration
is reversed.
Wiring and Grounding Guidelines
Input Cable Shielding (Figure 2)
The fieldbus signal to the Logix 1400 digital positioner
should be in shielded cable. Shields must be tied to a
ground at only one end of the cable to provide a place for
environmental electrical noise to be removed from the
cable. In general, shield wire should be connected at the
source.
Cable Requirements
The Logix 1400 digital positioner utilizes the fieldbus
communication protocol. Refer to Fieldbus Foundation
document AG-140, Wiring and Installation 31.25 kbit/s,
Voltage Mode, Wire Medium Application Guide for full
information on wiring and building fieldbus networks.
Grounding Screw
The green grounding screw, located inside the termination cap, should be used to provide the unit with an
adequate and reliable earth ground reference.
This ground should be tied to the same ground as the
electrical conduit. Additionally, the electrical conduit
should be earth grounded at both ends of its run. The
green grounding screw must not be used to terminate
signal shield wires.
46-4 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Field Terminations
FB Connection
Terminals
Housing EARTH
Terminal
Shielded
Cable
Ground
Fieldbus
connection
Figure 2: Field Termination
Driver Module Assembly
The driver module assembly moves the spool valve by
means of differential pressures on its diaphragm. Air is
routed to the module from the interface plate through a
hose that connects to the assembly through a hose barb
with an integral orifice. Wires from the module connect
the hall effect sensor and the pressure modulator coil to
the collector board.
Driver Module Assembly Replacement
To replace the driver module assembly, refer to Figures
3 - 5, 7 and 19 then proceed as outlined below. The
following tools are required:
1
/4-inch open-end wrench
1
/2-inch hex wrench
Phillips screwdriver
Driver Module removal tool
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the driver module cover, using a
wrench (Figure 4). Do not force the cover. If undue
resistance is encountered, use the slots to loosen
cover.
4. Remove the spool valve cover by removing the
screw and sliding the cover assembly backwards
until the tab is clear of the slot. It is not necessary
to remove the sheet metal cap from this assembly
(Figure 7).
5. Being careful not to lose the nylon washers, remove
the two phillips-head screws that attach the driver
module to the main housing (Figure 5).
6. Remove the spool valve block by removing the two
phillips-head screws and carefully sliding the block
off the spool (Figure 5).
1
/2-inch hex
CAUTION: The spool (extending from the driver
assembly) is easily damaged. Use extreme caution when handling driver assembly.
7. Remove the tubing from the orifice in the driver
module assembly. Using a
1
/4-inch open-end wrench,
remove the orifice from the driver module (Figure 4).
8. Remove the two wiring connections that link the
driver module assembly to the collector board.
(Figure 4).
9. Feed the wires back through the housing so they
extend backward toward the driver module opening.
This will allow the driver module to thread out without
tangling the wires.
10. Grasp the driver module cap with the driver module
removal tool and rotate the entire driver module
counter clockwise to remove. After it is threaded out,
carefully retract the driver module from the housing
to avoid damaging the spool.
11. Take the new driver module and verify that the O-ring
and boot are in place. Lay the wires back along the
modulators as shown in Figure 3 and hold in place.
12. Gently direct the driver module into the housing bore,
making sure the spool does not hit the housing. Turn
driver module clockwise to thread it into the housing.
Continue rotating the module until it bottoms out.
13. Once the threads are fully engaged, rotate the driver
module counter clockwise until the flat on the driver
module and the flat on the housing are aligned. This
will align the screw holes for the next step (Figure 3).
14. Verify that nylon gaskets are in the counter bores in
the driver module retaining screw holes as shown in
Figure 5.
15. Insert two driver-to-housing screws into the driver
housing through the counter-bored holes in the
positioner main housing. Tighten evenly with a phillips
screwdriver.
Collector Board
Pressure Modulator
Connection
Hall Sensor
Connection
Flat in Housing
Protective
Boot
O-ring
Orient this flat parallel
to flat in housing
Minimum Pressure Set Screw (factory calibrated)
Driver Module Assembly
Install orifice after driver
module is in housing
Figure 3: Driver Module Assembly
46-5Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Orifice
Nylon Gaskets
Driver to
Housing Screws
Spool
Spool
Valve
Screws
Driver
Module
Cover
Figure 4: Driver Module Orifice
16. Feed the driver module wires into the main chamber
of the housing and connect them to collector board.
17. Verify that the three O-rings are in the counter-bores
on the machined platform where the spool valve
block is to be placed (Figure 19)
18. Carefully slide the block over the spool, using the
machined surface of the housing base as a register
(Figure 5). Slide the block toward the driver module
until the two retaining holes line up with the threaded
holes in the base.
19. Install two spool-valve screws and tighten securely
with a phillips screwdriver.
20. Insert the orifice into the threaded hole in the driver
module assembly. Tighten with a 1/4-inch open-end
wrench (Figure 4). Attach the flexible tubing from the
interface plate to this fitting.
21. Set the minimum pressure as described on page 10.
22. Thread driver module cover into driver module bore
in the main housing.
Spool
Valve
Block
Housing
Figure 5: Spool and Block
5. Remove the molded filter element by pulling it
straight out of chamber cover vent piece.
6. Install O-ring into base of chamber cover vent piece
as shown in Figure 6.
7. Place new molded filter element into the chamber
cover vent piece. This element provides part of the
track to secure the O-ring installed in the last step.
8. Place spool valve shroud onto spool valve cover.
9. Place the spool valve cover assembly in place by
setting it on the ramp and sliding it until the tab seats
in the slot (Figure 7) and secure with No. 8-32 screw.
O-ring
Spool Valve Cover
The spool valve cover incorporates a coalescing filter
element in a two-piece cover. This protects the spool
valve chamber from moisture and provides a low back
pressure vent for exhaust air from the spool valve.
Replacing Filter in Spool Valve Cover
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the spool cover by removing the screw and
sliding the cover assembly backward until the tab is
clear of the slot. The sheet metal cover may be
removed and cleaned with a brush or by blowing out
with compressed air (Figure 7).
4. Remove the O-ring from around hydrophobic filter
element and set aside (Figure 6).
46-6 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Hydrophobic
Filter
Spool
Valve
Cover
Spool
Valve
Shroud
Figure 6: Spool Valve Cover Assembly
Spool Valve
Cover
Screw
Figure 7: Spool Valve Cover Assembly
Ribbon Cable
Main PCB Assembly
Screws (3)
Regulator
The regulator reduces the pressure of the incoming
supply air to a level that the driver module can use.
Replacing Regulator
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and unscrew the regulator
from the interface plate, exercising caution not to
damage the collector board (Figure 19).
4. Verify that the O-rings are in place on the base of the
new regulator
5. Replace the regulator by threading into the port on
the interface plate.
6. Check regulating pressure to ensure that it is set at
22 psi.
Internal Coalescing Filter
The internal coalescing filter ensures that supply air is
clean and dry before it gets to the regulator. Because the
air has already been filtered before this point, the element
should not require extended maintenance.
Replacing Input Filter Element (Figure 19)
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and remove collector board
by disconnecting the wiring and removing three
screws that attach it to the housing. Each cable has
its own unique connector to prevent improper
connections.
4. Remove the four No. 6-32 hex screws from the filter
housing and remove filter housing.
5. Remove the old coalescing filter from the bore in the
interface plate.
Figure 8: Main PCB Assembly
6. Insert new coalescing filter into the bore on interface
plate.
7. Verify that the O-ring is in place in filter housing.
8. Set filter housing over coalescing filter and secure
with four No. 6-32 screws.
9. Replace collector board and reconnect wiring.
Main PCB Assembly
The main PCB assembly contains the circuit boards and
processor that perform the control functions of the
positioner. The boards are conformal-coated with a
protective silicon coating. This module can be easily
replaced if positioner upgrades are desired. None of the
components are user-serviceable. This module is to be
replaced as an entire unit.
Replacing Main PCB Assembly (Figure 8)
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and disconnect the ribbon
cable from the collector board.
CAUTION: To avoid damaging any components,
exercise caution by gently raising the locking tab
to release the ribbon cable.
4. Remove the PCB assembly by removing the three
No. 6-32 screws and lifting out of housing.
5. Place the new PCB assembly on bosses inside the
positioner housing.
6. Insert three No. 6-32 screws through the boards, with
the nylon washers on the bottom into the threaded
bosses and tighten evenly, using a phillips screwdriver. Do not overtighten.
7. Reconnect the ribbon cable to the collector board.
46-7Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Collector Board
The collector board assembly provides a central routing
for all electronic connections in the positioner, linking the
pressure modulator coil, hall effect sensor and field
inputs to the main electronics. The collector board
assembly also serves as a mounting for the pressure
sensors used on the advanced model of the positioner.
Removing Collector Board (Figure 19)
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and disconnect the wiring to
the collector board. Each cable has its own unique
connector to prevent mistakes in reconnecting.
4. Remove the three No. 8-32 screws holding the
collector board to the housing.
5. Remove the collector board.
Replacing/Upgrading Collector Board
1. For the advanced collector board (Logix 1x1x),
check that pressures sensors are in place on back
of collector board. For the standard model (Logix
1x0x), make sure the adapter block is securely
fastened to the collector board.
2. Make sure the O-rings are in place in the counterbores
of the pressure ports.
3. Set collector board assembly in place.
4. Insert three No. 8-32 screws through collector boards
into the threaded holes on sensor shelf and standoff.
5. Tighten all three screws.
6. Connect the main ribbon from electronics tray.
7. Reconnect wiring to the collector board.
Field Terminations
The field terminations board provides a connection point
inside the explosion-proof housing for all hookups to the
positioner. While the board is not likely to experience a
failure, it can easily be replaced to upgrade the positioner.
Replacing Field Terminations Board
(Figure 19)
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and disconnect the field
termination cable from collector board.
4. Remove the field terminations cover and the three
No. 8-32 screws.
5. Remove field terminations board, carefully pulling
wiring through bore.
6. Verify that the O-ring is in place in the counter bore
in the positioner housing.
7. Feed wiring through passageway into main chamber
of housing.
8. Set the circuit board in place and secure with three
No. 8-32 screws.
9. Connect field termination cable to collector board.
Stem Position Sensor
The position feedback assembly transmits valve position information to the processor by means of a rotary
position sensor that connects to the valve stem through
a feedback linkage. The follower arm is biased against
one side of the slot with a rotary spring to provide
accurate tracking of the pin in the slot. This spring also
automatically moves the position feedback assembly to
its limit in the unlikely event of failure of any component
in the linkage.
Stem Position Sensor Replacement
(Figure 9)
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the main cover and disconnect rotary position sensor wires from collector board.
4. Remove the two screws from the rotary position
sensor, taking care not to lose the washers, and
remove the sensor from the housing.
5. Turn position sensor shaft until the dot on the slot is
aligned with the wires on the pot (Figure 9).
6. Insert the position sensor into the shaft with the
wires pointing toward the main PCB assembly. Turn
position sensor clockwise until the bolting slots align
with the housing screw holes and the wires on the
sensor protrude over the main PCB assembly tray.
7. Carefully center the position sensor on the shaft
bore, insert and tighten the screws.
Do not over
tighten.
8. Route wires along the position sensor and reconnect
to collector board.
Rotate Stem Position
Sensor
slowly
Stem Position Sensor
Housing
Sensor Cable
Feedback
Shaft
Bearing
Stem Position Sensor Dot
Figure 9:
Stem Position Sensor Orientation
46-8 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
LED Indicators
The Logix 1400 digital positioner has three LED indicators that are visible through a window in the main cover.
Only one LED will blink at any given time. Each LED has
a different color to convey basic information about the
positioner status. Green indicates that the positioner is
operating normally. Yellow indicates that a ‘customer
defined limit’ or ‘alert’ has been reached. Red indicates
that an error condition exists. A fieldbus configurator
must be used to determine the specific reason for a
yellow or red LED status.
During stroke and actuator calibration, no LED will blink.
After calibration is complete, the green LED indicates
that the calibration was completed successfully. If the
yellow or red LED blinks after a calibration process, a
warning or error was detected and the configurator must
be used to identify the specific calibration error.
NOTE: If the LED indicator changes from green to yellow
after a calibration process, the user may have set a
warning limit (position alert, cycle counter alert, etc.).
Use a fieldbus configurator to monitor status.
Re-Cal Button
If the fieldbus configurator is not available, Logix 1400
digital positioner has a Re-Cal feature that performs a
stroke calibration and allows basic operation of the positioner.
NOTE:The Re-Cal operation retains all previously configured information. All settings remain unchanged except
stroke calibration parameters. If the device is being
installed for the first time, factory default parameters are
used. The FB Configurator must be used the first time to
configure the Logix 1400 digital positioner. The trans-
ducer block must be out of service for Re-cal to work.
The Re-Cal button is located on the collector board inside
the main housing chamber as shown in Figure 10.
Warning: Accessing this function requires removal
of the main cover. The user must take all necessary
precautions if this operation is performed in explosion-proof areas.
Re-Cal Button
NOTE: DIP switches not
used on Logix 1400
positioner
Figure 10: Re-Cal Button
Make the appropriate configuration settings, using FB
Configurator and CONTROL_FLAGS variable. ATO/ATC
selects air-to-open or air-to-close (this is determined by
the mechanical tubing of the actuator). The Actuator
Style check box allows the user to select linear or rotary
feedback linkage. If
activates custom characterization.
Press Re-Cal button and hold for five seconds. If the button
is released before five seconds have elapsed, no action
will be taken. After five seconds, the positioner will begin
a stroke calibration. Release the Re-Cal button once
calibration has started. The positioner will automatically
stroke the valve. No LED will blink during this process.
Upon completion of calibration:
•A blinking green LED indicates the valve is in control
mode and calibration was successful.
•A blinking yellow LED immediately after a stroke
calibration usually indicates that the valve did not
stroke. Check the air supply and cable connections.
• The red LED will blink if a calibration error occurred.
The cause of a red LED is generally a stem position
linkage/feedback sensor alignment problem. For
linear linkage, the active electrical feedback angle is
65 degrees. For rotary linkage, the active electrical
feedback angle is 95 degrees. The red LED indicates
that the mechanical travel is not centered within the
electrical sensor travel. If a red LED is blinking after
a stroke calibration, loosen the feedback sensor
mounting screws as shown in Figure 9. Turn the stem
position sensor slowly while watching the LED indicators. Try small movements, both clockwise and counterclockwise. If the yellow LED begins to blink, the
feedback sensor has been correctly moved into range.
Tighten the feedback sensor mounting screws and
repeat the Re-Cal procedure. If the LED remains red
even after moving the full length of the sensor slot,
verify the following items:
under the CONTROL_FLAGS parameter ‘Actuator
Style’ (checked is rotary, unchecked is linear), stem
clamp and take-off arm height.
Custom
is selected, the positioner
Rotary
check box setting
NOTE:If the stroke stops in the closed position, the error
occurred when the position sensor/linkage was at closed
position. If the stroke stops in the open position, the error
occurred when position sensor/linkage was at the open
position. No calibration parameters are saved if an error
occurs. If the power to the positioner is removed, the unit
will power-up with the previous configuration parameters.
A successful calibration will save parameters.
If the valve does not stroke after pressing the Re-Cal
button, this may be an indication that the internal regulator pressure and/or the driver module minimum pressure is low. Refer to the following instructions to check
and set the internal regulator and minimum pressure
settings.
Note that the tools and equipment used in the next two
procedures are from indicated vendors.
46-9Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
This port is Internal Regulator Output. This
should be tubed to orifice on Driver Module.
Check pressure through
No. 10-32 x
1
/16 Barb fitting
Regulator Pressure
Test Port
Internal
Regulator
Set Screw
Figure 11: Internal Regulator
Checking or Setting Internal Regulator
Pressure
1. Disconnect the air supply from the positioner.
2. Remove the main cover. The regulator pressure set
port is factory plugged with a No. 10-32 hex plug
(Figure 11). Replace hex plug with a No. 10-32 x
1
/16-inch barb fitting.
3. Attach a 0 to 30 psi pressure gauge (with some
1
/16-inch flexible tubing) to the barb fitting shown in
Figure 11.
4. Reconnect the air supply to the positioner and read
the internal regulator pressure on the 0 to 30 gauge
(the internal regulator should be set to 22.0 psi).
Adjust the regulator pressure by turning the set
screw with a small flat screwdriver.
5. Once the regulator pressure is set, remove the air
supply to the positioner, and replace the No. 10-32 x
1
/16-inch barb fitting with the No. 10-32 hex plug.
Checking or Setting the Driver Module
Minimum Pressure
Once the internal regulator pressure is set to 22.0 psi, the
driver module minimum pressure can be checked. To do
this, refer to Figure 12, and proceed as follows:
1. Make sure valve is bypassed or in a safe condition.
2. Disconnect power from the positioner.
3. Remove the main cover and remove the
flexible tubing from the orifice.
1
/16-inch
4. Obtain a No. 10-32 x swivel elbow (Pneumadyne part
No. SFL-10 or equivalent).
5. Remove No. 10-32 x .016 orifice (Figure 4) from the
driver module, and screw in No. 10-32 x swivel elbow.
6. Direct the swivel elbow so the minimum pressure
test port is accessible.
7. Screw a No. 10-32 x
1
/16-inch barb fitting into the test
port, and screw the No. 10-32 x .016 orifice into the
end of the elbow as shown.
8. Connect the tubing from the internal regulator output
port to the orifice.
9. Using some
1
/16-inch flexible tubing, connect a 0 to
30 gauge to the minimum pressure set port.
10. Once the gauge is connected, reapply the positioner
air supply. The minimum pressure should now be
registering on the gauge and must be 3.8 to 4.2 psi.
If the minimum pressure is not correct, use a
9
/64-inch Allen wrench to turn the minimum pressure
set screw located at the bottom of the driver module
(Figure 3) until the pressure is in the range indicated.
Cycle the positioner air supply several times and
recheck the minimum pressure and readjust, if
necessary, to ensure that the pressure has settled
within the range specified.
11. When the pressure is set, remove the air supply.
12. Remove the No. 10-32 x
1
/16-inch barb and orifice from
the swivel elbow and then remove the swivel elbow.
13. Replace the orifice as shown in Figure 4 and
reconnect the
1
/16-inch tubing from the internal regulator output port to the orifice. Reconnect the positioner air supply and power. The positioner should
now be ready to calibrate.
Minimum Pressure
Test Port
No.10-32 x
1
/16-inch
barb
No.10-32 x Swivel
ELL Pneumadyne
Part No. SFL-10
No.10-32 x .016
Orifice
Pressure from
Internal Regulator
to be tubed to this
orifice
Figure 12: Driver Module
46-10 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
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