4060 & 4070 Positioner Instruction Manual

Instruction Manual Form 5452 January 1999

Types 4060 & 4070

Type 4060 and 4070 Valve Positioners Contents Introduction

.............................. 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation

................................ 3 Positioner Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pressure Connections . . . . . . . . . . . . . . . . . . . . . . . . 4 Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . 5 Instrument Connection . . . . . . . . . . . . . . . . . . . . . . . 5 Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical Connections for Type 4070 Electro-Pneumatic Positioners . . . . . . . . . . . . . . . 6

Operating Information

................... 6 Front Cover and Indicator Cover . . . . . . . . . . . . . . . 6 Cam Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Pre-calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Span and Zero Adjustment . . . . . . . . . . . . . . . . . . . 8 Damper Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Principle of Operation

W7099-1 / IL

Figure 1. Type 4070 Electro-Pneumatic Valve Positioner

................... 9

Maintenance

Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . .

12

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12

Introduction Scope of Manual This instruction manual provides installation, operating, calibration, maintenance, and parts ordering information for the Type 4060 pneumatic positioner and the Type 4070 electro-pneumatic positioner. Refer to

D102589X012

.............................. 9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Replacing Gauges . . . . . . . . . . . . . . . . . . . . . . . . . 10 Replacing the Pilot valve . . . . . . . . . . . . . . . . . . . . 10 Replacing the Diaphragm . . . . . . . . . . . . . . . . . . . 11 Replacing the I/P Unit Filter . . . . . . . . . . . . . . . . . . 11 Removing the Positioner . . . . . . . . . . . . . . . . . . . . 11 Replacing the Positioner . . . . . . . . . . . . . . . . . . . . 12

Type 4060 & 4070 Table 1. Specifications

Available Configurations Type 4060: Double-acting pneumatic valve positioner Type 4070: Double-acting electro-pneumatic valve positioner Input Signal(1)

Supply Pressure(1) Type 4060: 125 psig (8.6 bar), maximum Type 4070: 21.8 to 125 psig (1.5 to 8.6 bar) Operative Temperature Limits(1) –40 to 185_F (–40 to 85_C) Housing Classification NEMA 4, IP66 per IEC 529

Type 4060: 3 to 15 psig (0.2 to 1.0 bar) Type 4070: 4 to 20 mA dc Output Signal(1) Type 4060 and 4070: Pneumatic pressure as required by the actuator up to full supply pressure

Pressure Connections 1/4-inch NPT Gauge Connections 1/8-inch NPT

Air Consumption See table 2

Approximate Weight Type 4060: Without gauges: 2.4 lbs (1.1 kg) With gauges: 2.9 lbs (1.3 kg) Type 4070: Without gauges: 3.4 lbs (1.5 kg) With gauges: 3.9 lbs (1.8 kg)

Air Delivery See table 2 Performance See table 3 1. This term is defined in ISA Standard S51.1.

you have any questions concerning the instructions in this manual, contact your Fisher Controls sales office or sales representative before proceeding.

Table 2. Positioner Air Consumption and Air Delivery U. S. Units, SCFM(1) Supply Pressure, psig Air Consumption

29

58

87

116

145

Type 4060

0.19

0.43

0.71

0.98

1.26

Type 4070

0.22

0.48

0.78

1.08

1.38

6.9

12.8

18.8

24.7

30.6

Air Delivery

Metric Units, normal m3/hr(2) Supply Pressure, bar Air Consumption

2

4

6

8

10

Type 4060

0.31

0.69

1.14

1.58

2.03

Type 4070

0.35

0.77

1.25

1.74

2.22

11.1

20.6

30.2

39.7

49.2

Air Delivery

1. SCFM—Standard cubic feet per minute (60_F and 14.7 psia) 2. Normal m3/hr—Normal cubic meters per hour (0_C and 1.01325 bar, absolute)

Table 3. Typical Performance for Type 4060 & 4070 Positioner Type 4060

Type 4070

Repeatability

Characteristic

≤0.5%

≤0.5%

Linearity (1)

≤0.5%

≤0.75%

Hysteresis (1)

≤0.75%

≤1.0%

1. This term is defined in ISA Standard S51.1

Description The Type 4060 pneumatic positioner and the Type 4070 electro-pneumatic positioner are designed for use with the Type 585C and 585CR piston actuators.

These positioners mount on the actuator and provide the desired valve plug position for a specific input signal. The Type 4060 accepts a pneumatic input signal and the Type 4070 accepts a 4 to 20 milliampere dc input signal.

The positioners come standard with built in dampers, gauge ports and an O-ring sealed housing. The housing utilizes a unique O-ring seal that can be adjusted to a sealed or drained position.

Ease of calibration and maintenance are built into the design with easily accessible span and zero adjustment, and very simple parts replacement.

separate instruction manuals for information on the actuator, control valve, and other accessories.

Specifications

Only personnel qualified through training or experience should install, operate, or maintain these positioners. If

Specifications for the Type 4060 and 4070 valve positioners are listed in table 1.

2

Type 4060 & 4070 Installation Typically, the positioner is ordered with the actuator. If so, the factory mounts and calibrates the valve positioner and connects the positioner output to the actuator. If the positioner is ordered separately from the actuator, perform the mounting procedure. Refer to the appropriate instruction manuals for actuator and valve installation procedures.

WARNING Avoid personal injury from sudden release of process pressure. Before mounting the positioner on a valve in service: _ Disconnect any operating lines providing air pressure or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve. _ Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure on both sides of the valve.

Drain the process media from both sides of the valve. _ Vent actuator loading pressure and relieve any actuator spring precompression. _ Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

Positioner Mounting Remove the storage seal, shown in figure 2, from the connection block, mount the positioner on the actuator, and make connections to the instrument.

The mounting bracket (key 7B) is used for side mounting the positioner to the actuator yoke. Refer to figure 3 for part locations.

A7226 / IL

Figure 2. Storage Seal Location

3. Attach the feedback lever arm assembly to the positioner spindle with the flat head screw as shown in figure 4.

Note The stem connector bolts may not be long enough to permit mounting the feedback bracket with spacers. If not, replace the stem connector bolts with the bolts included in the mounting kit (key 7G). See the actuator instruction manual for information on installing the stem connector.

4. Place the feedback bracket (key 7A), with spacers (key 7E), over the stem connector bolts so that the slot in the feedback bracket (key 7A) is opposite the actuator travel indicator. Fasten the feedback bracket in place with two hex nuts (key 7F).

5. Position the actuator to its mid-travel position using a handwheel or manual loading regulator.

Note In the next step. loosening the cam locking nut inside the positioner may aid positioner mounting. See figure 9 for cam locking nut location.

1. Attach the mounting bracket (key 7B) to the positioner with the two hex head bolts (key 7D) as shown in figure 3.

6. With the actuator at its mid-travel position, insert the mounting bolt (key 7C) through the slotted hole in the mounting bracket (key 7B).

2. Adjust the pin on the feedback lever arm assembly (key 2) for the appropriate actuator travel (see figure 4). For actuators with 3/4-inch (19.1 mm) travel or less, use the 30 degree markings. For actuator travels greater than 3/4-inch (19.1 mm), use the 60 degree markings.

7. Attach the bracket to the actuator yoke leg opposite the travel indicator web. Leave the mounting bolt loose. Be sure the feedback lever assembly pin engages the feedback bracket slot.

8. Position the positioner mounting bracket (key 7B) so that the feedback lever arm assembly (key 2) is

3

Type 4060 & 4070 BOLTS MOUNTING BRACKET BOLT P/P POSITIONER LEVER ARM ASSY FEEDBACK BRACKET

INSTRUMENT GAUGE PORT 1/4 NPT INSTRUMENT PORT SUPPLY GAUGE PORT 1

1/4 NPT C1 PORT C1 GAUGE PORT

CAP SCREWS HEX NUT

1/4 NPT SUPPLY PORT

NOTE: 1 TWO CAP SCREWS (KEY 7G) ARE INCLUDED IN MOUNTING KIT IF LONGER LENGTH IS REQUIRED.

SPACERS

C2 GAUGE PORT 1/4 NPT C2 PORT

37B9461-A B2643 / IL

Figure 3. Mounting the Positioner on a Type 585C Actuator

Pressure Connections POSITIONER SPINDLE (NOT PART OF THE FEEDBACK LEVER ASSEMBLY) FLATHEAD SCREW

PIN

WARNING

NUT BOLT

A7194 / IL

Pressure and gauge connections are shown in figure 5. All pressure connections are 1/4-inch G or NPT female connectors. Use 3/8-inch tubing or 1/4-inch pipe for all pressure connections. Gauge ports are 1/8-inch G or NPT female connectors.

FEEDBACK LEVER ARM

Figure 4. Positioner Feedback Lever Arm Assembly (Key 2)

Valve positioners are capable of providing full supply pressure to connected equipment. To avoid personal injury and equipment damage, make sure the supply pressure never exceeds the maximum safe working pressure of any connected equipment.

Supply Connection parallel to the feedback bracket (key 7A) at mid-travel position. Tighten the mounting bolt (key 7C).

9. Be sure the feedback lever arm assembly pin does not pinch, bind, or bend while manually stroking the actuator.

4

WARNING Personal injury or property damage may occur from an uncontrolled process if the supply medium is not clean, dry, oilfree air, or non-corrosive gas. Industry

Type 4060 & 4070 Output Connections

I/P UNIT, TYPE 4070

For Type 585C actuators, connect the positioner output port C1 to the actuator lower cylinder (yoke) connection. Connect output port C2 to the actuator upper cylinder connection.

For Type 585CR actuators, connect the positioner output port C1 to the actuator upper cylinder connection. Connect output port C2 to the actuator lower cylinder (yoke) connection.

INPUT SIGNAL GAUGE PORT FOR TYPE 4060

For single-acting operation plug port C1 for increasing signal to open or close. Plug C2 for decreasing (reverse) signal to close.

INSTRUMENT CONNECTION

Gauge ports C1 and C2 are sealed with plugs. To install gauges, unscrew the plugs and install gauges.

OUTPUT CONNECTION SUPPLY CONNECTION

GAUGE PORTS

OUTPUT CONNECTION A7227 / IL

Figure 5. Positioner Pressure and Gauge Connections

instrument air quality standards describe acceptable dirt, oil, and moisture content. Due to the variability in nature of the problems these influences can have on pneumatic equipment, Fisher Controls has no technical basis to recommend the level of filtration equipment required to prevent performance degradation of pneumatic equipment. A filter or filter regulator capable of removing particles 40 microns in diameter should suffice for most applications. Use of suitable filtration equipment and the establishment of a maintenance cycle to monitor its operation is recommended.

The supply medium must be clean, dry air or noncorrosive gas that meets the requirements of ISA Standard S7.3-1975. The supply pressure should not exceed the following limits: _ For the actuator and positioner, do not exceed the maximum pressure rating of 125 psig (8.6 bar). _ For the valve, do not exceed the maximum allowable thrust of the specific valve.

Connect supply pressure to the positioner supply port S. Gauge port S is sealed with a plug. To install a supply gauge, unscrew the plug and install an appropriate gauge.

Instrument Connection Connect the control device 3 to 15 psig (0.2 to 1.0 bar) output to the positioner input port I. If a gauge is desired, remove the plug from port Ip and install an appropriate pressure gauge.

The Type 4070 electro-pneumatic positioner requires a 4 to 20 milliampere dc current input signal from the control device. For connections to the Type 4070, refer to the electrical connections section.

Vent WARNING If a flammable, toxic, or reactive gas is to be used as the supply pressure medium, personal injury or property damage could result from fire or explosion of accumulated gas or from contact with toxic, or reactive gas. The positioner/actuator assembly does not form a gastight seal, and when the assembly is enclosed, a remote vent line, adequate ventilation, and necessary safety measures should be used. A remote vent pipe alone cannot be relied upon to remove all hazardous gas. Vent line piping should comply with local and regional codes and should be as short as possible with adequate inside diameter and few bends to reduce case pressure buildup.

The port (OUT) is for venting the unit. All air from the positioner, actuator, and I/P unit is vented to atmosphere through this port. This port should be left open

5

Type 4060 & 4070 I/P UNIT CONTROL DEVICE

A7228 / IL

Figure 6. I/P Unit Storage Seal Location

A3875-1 / IL

Figure 7. Typical Field Wiring Diagram

to prevent pressure buildup inside the case and to provide a drain hole for any moisture that might collect inside the case. If a remote vent is required, the vent line must be as short as possible with a minimum number of bends and elbows.

The vent port (OUT) or the end of a remote vent pipe must be protected against the entrance of all foreign matter that could plug the vent. Check the vent periodically to be certain it is not plugged.

the terminal screws. Maximum torque is 4 lbf_in. (0.45 N_m). Connect the I/P unit grounding terminal to an earth ground.

To monitor the I/P unit output, install a gauge in gauge port P. Gauge port P is sealed with a plug. To install a gauge, unscrew the plug and install a gauge.

Operating Information Electrical Connections for Type 4070 Electro-Pneumatic Positioners WARNING For intrinsically safe installations, refer to the factory drawings or to instructions provided by the barrier manufacturer for proper wiring and installation.

Do not make connections to port I. It is automatically sealed off and protected.

Remove the storage seal, shown in figure 6, from the end of the unit to expose the conduit entry. Use the 1/2-inch NPT conduit connection or PG 13.5 (M20) cable gland for installation of field wiring.

Refer to figure 7 when connecting field wiring from the control device to the I/P unit. Connect the positive wire from the control device to the I/P unit positive (+) terminal, and the negative wire from the control device to the I/P unit negative (–) terminal. Do not overtighten

6

Front Cover and Indicator Cover The positioner front cover is shown in figure 8. It is secured to the unit with four captive screws and sealed with an O-ring. The front cover O-ring can be looped over notches in the front cover to allow for drainage.

There are eight locations on the front cover where the O-ring can be looped. This O-ring system is common to the pneumatic unit and I/P unit. This unique sealing system allows for complete sealing or draining of the units by changing the position of the front cover Oring.

The indicator cover is O-ring sealed and secured by a bayonet coupling. The indicator cover also secures the identification cover to the front cover.

To remove the indicator cover, turn it slightly counterclockwise until it loosens. The identification cover and indicator cover O-ring are now removable. When installing the indicator cover and identification cover, make sure that the indicator cover O-ring is properly engaged.

Type 4060 & 4070

FRONT COVER

FRONT COVER O-RING

INDICATOR COVER O-RING

INDICATOR COVER

IDENTIFICATION COVER

NOTCH FRONT COVER SHOWN WITH O-RING LOOPED OVER NOTCHES TO PERMIT DRAINING

B2644 / IL

Figure 8. Front Cover and Indicator Cover

1/16-INC H (1–2 mm)

CAM FOLLOWER

CAM LOCKING NUT

SCREW

CORRECT

CAM B2645 / IL

INCORRECT

Figure 9. Cam Adjustment

Cam Adjustment Refer to figure 9. With the cover and indicator removed, loosen the screw and turn the cam locking nut counterclockwise until the cam loosens.

The cam has two lobes. The 30 degree lobe is used for actuator travels of 3/4-inches (19.1 mm) or less.

The 60 degree lobe is used for actuator travels of

CAM POSITIONED FOR A FAIL-OPEN ACTUATOR WITH 3/4-INCH (19.1 MM) OR LESS TRAVEL

greater than 3/4-inch (19.1 mm). The cam also may be turned over. Each lobe is stamped either direct (D) or reverse (R). Refer to table 4 for cam installation information.

Install the cam so that the follower will ride on the correct lobe listed in table 4. For fail-open actuators, the follower will ride on the cam lobe to the right of the follower. For fail-close actuators the follower will ride on the cam lobe to the left of the follower.

7

Type 4060 & 4070 Table 4. Cam Position Information

SPRING GUIDE

LOCKING SCREW

Cam Orientation for Actuator Failure Mode Fail Open Fail Close

Actuator Travel

Cam Lobe

greater than 0.75 inch (19.1 mm)

60_

D

R

less than or equal to 0.75 inch (19.1 mm)

30_

D

R

To secure the cam, make sure the screw is backed out from the locking nut. Tighten the locking nut finger tight then tighten the screw. Install and adjust the indicator and reinstall the cover.

SPAN ADJUSTMENT

Calibration Pre-calibration Ensure that the cam is installed correctly for the appropriate actuator travel and failure mode. Refer to the “Cam Adjustment” procedure. Also ensure the pin on the feedback lever arm assembly is positioned correctly for the appropriate actuator travel. Refer to step 2 in the “Positioner Mounting” procedure.

With the two locking screws facing you, as shown in figure 10, there should be at least one coil of the feedback spring above the screws. However, the end of the feedback spring should not touch the spring guide.

To adjust the spring, loosen the two locking screws.

Hold the two locking screws in place while rotating the feedback spring. Tighten the locking screws.

Zero and Span Adjustment Refer to figure 10.

1. Remove the positioner front cover.

2. Apply supply pressure to the positioner.

3. Set the input signal to the 0% value and wait for the unit to reach steady state.

4. Rotate the zero adjustment until the actuator stem is at its starting position. Zero is adjusted by turning the silver thumb wheel located on the lower arm or externally with a screwdriver through the zero adjustment opening.

5. Slowly increase the input signal until the input reaches the 100% value. Observe the actuator travel and valve position as the input increases. Note the actuator travel at 100% input signal.

6. Set the input signal to the 0% value.

8

LOWER ARM ZERO ADJUSTMENT

ZERO ADJUSTMENT COVER

A7229 / IL

Figure 10. Positioner Span and Zero Adjustment Locations

7. If necessary, loosen the locking screw and adjust the span as follows (span is adjusted with the brass colored thumb wheel located on the feedback spring): D If the actuator travel recorded in step 5 is short of the desired travel at 100% input signal, rotate the span adjustment to the left to increase span. Tighten the locking screw.

D If the travel recorded in step 5 reaches the desired travel before the input signal reaches the 100% value, rotate the span adjustment to the right to decrease span. Tighten the locking screw.

After the span adjustment, recheck to be sure the end of the feedback spring is not touching the spring guide.

8. After a span adjustment, recheck the zero and adjust if necessary.

9. Repeat steps 4 through 8 as necessary to achieve correct actuator travel.

Type 4060 & 4070 1

2

7

8 DAMPER ADJUSTMENTS

3

A7230 / IL

Figure 11. Damper Adjustment A7231 / IL

10. Replace the positioner front cover.

5

6

4

Figure 12. Principle of Operation

11. If you used the zero adjustment opening, remember to install the zero adjustment cover to ensure the unit is sealed.

pilot valve is in a neutral position—the complete unit is in a balanced position. Air is supplied to the pilot valve through port S, and controls the air flow through ports C1 and C2

Damper Adjustment

Assume an equilibrium position. An increasing control pressure deflects the diaphragm 1 down, compressing the feedback spring 3. The balance arm 2 moves the spool 7 in the pilot valve 8 furnishing supply air to the actuator, while at the same time air is exhausted from actuator and is vented to atmosphere through the pilot valve and the OUT port.

The built in dampers provide a simple means of adjusting the actuator travel speed. The damper adjustments are located on the connecting block as shown in figure 11. For maximum actuator travel speed adjust dampers to the minimum damping position.

Double acting actuators—adjust only the OUTLET damper. Set the SUPPLY damper to the minimum damping position.

Single acting actuators—adjust both dampers for desired operation.

With increasing supply air, the linear motion of the actuator stem rotates the positioner spindle 6. The spindle and cam 5 rotation forces the lower arm 4 upwards compressing the feedback spring 3. This motion continues until the two forces are equal and the unit is in an equilibrium position.

Principle of Operation

Maintenance

Refer to figure 12.

The pneumatic positioner operates on a force balance principal. Force is originated by the signal pressure transmitted through a diaphragm on to the balance arm. The opposing force is achieved through the feedback spring and is proportional to the position of the lower arm. The lower arm position is determined by the position of the cam which is secured to the spindle and connected to the actuator shaft thus providing the feedback from the actuator/valve. When these two forces are equal, the balance arm and the spool in the

WARNING Avoid personal injury from sudden release of process pressure. Before mounting the positioner on a valve in service: _ Disconnect any operating lines providing air pressure or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve.

9

Type 4060 & 4070 _ Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure on both sides of the valve.

Drain the process media from both sides of the valve.

BALANCE ARM SPOOL

_ Vent actuator loading pressure and relieve any actuator spring precompression.

PILOT VALVE ASSEMBLY

SCREW

_ Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment. _ For Type 4070 electro-pneumatic positioners in intrinsically safe areas, current monitoring during operation must be with an approved meter for hazardous areas in order to avoid personal injury or property damage caused by an explosion or fire.

SPOOL GROVE

LEAF SPRING

A7232 / IL

Figure 13. Pilot Valve Assembly

—Input signal fluctuates.

—Incorrect sizing of actuator.

Troubleshooting Signal change has no effect on the actuator position.

—Check indicator and screw.

—Check air supply to positioner and tubing to the actuator.

—Check input signal to positioner.

—Check diaphragm for damage or leakage.

—Check pilot valve function.

—Check cam for correct setting.

—Valve/actuator “stiction”.

—High valve/actuator breakaway torque.

—Loose cam.

Replacing Gauges 1. Shut off supply pressure and process lines to the positioner.

2. Remove the defective gauge.

3. Coat the threads of the replacement gauge with a sealant (Zink plate No. 770 or equivalent).

4. Screw the replacement gauge into the gauge port.

5. Apply supply pressure to the positioner. Using a soap solution, check around the ports and connections for leaks.

—Check I/P output

Replacing the Pilot Valve Signal change results in actuator running to end positions.

Refer to figure 13 to remove the pilot valve for cleaning or inspection.

—Check coupling between positioner and actuator.

1. Remove the screw and carefully lift out the complete pilot valve assembly.

2. Gently remove the spool from the block and clean the parts, using mentholated cleaner or similar. Blow the parts dry with compressed air. If the parts show signs of wear, replace the assembly.

—Check cam position and locking screw.

—Check input signal.

Inaccurate positioning.

—Dirty or worn pilot valve.

—Defective or leaking diaphragm.

10

Note Mixing spool valves and valve bodies may result in very high bleed rates and poor performance.

Type 4060 & 4070 DIAPHRAGM COVER SCREWS

FILTER O-RING

SCREW

WASHERS

DIAPHRAGM A7234 / IL

FILTER PLUG

Figure 15. Filter Replacement

Replacing I/P Unit Filter CAUTION

A7233 / IL

Figure 14. Diaphragm

3. Check the O-rings, then secure and install the pilot valve assembly to the positioner housing and secure it with the screw. Make sure that the leaf spring on the balance arm is properly fitted in the spool groove.

4. Check again to insure smooth operation of the assembly.

Replacing the Diaphragm Refer to figure 14. For Type 4070 electro-pneumatic positioners, the I/P unit must be removed to access the diaphragm.

1. Loosen the four screws and remove the diaphragm cover.

Do not operate the unit without filter and filter plug installed. Do not attempt to unscrew filter plug while positioner is pressurized.

The I/P unit on the Type 4070 positioner is equipped with a built in secondary filter located on the side of the I/P unit.

For replacement or inspection, refer to figure 15. Make sure the positioner unit is not pressurized, then unscrew the filter plug. Remove the filter and install a new one into the filter plug . Check the condition of the O-ring and filter compartment. If moisture is found, check upstream filters and oil-and-water separators.

Moisture can cause the I/P unit to fail. Reinstall the filter plug.

2. Loosen the screw that secures the diaphragm. Remove the diaphragm and washers.

When installing the diaphragm make sure to place one washer on each side of the diaphragm. Make sure that the raised circle on the washers is facing the diaphragm.

Removing the Positioner 1. Shut off supply pressure and process lines to the positioner.

3. Install the screw and tighten.

2. Disconnect pneumatic and, if necessary, electrical connections.

4. Check the O-ring on the diaphragm cover, then install and secure the cover with the four screws.

3. Remove the screws that attach the positioner to the mounting bracket and remove the positioner.

11

Type 4060 & 4070 Replacing the Positioner

Parts List

1. Replace the positioner on the actuator by performing the mounting and connection procedures in the “Installation� section.

Key

2. Calibrate the positioner by performing the procedures in the “Calibration� section.

Parts Ordering When corresponding with your Fisher Controls sales office or sales representative about this equipment, refer to the serial number found on the serial tag attached to the positioner body. Also, specify the complete 11-character part number from the following parts list when ordering replacement parts.

Description

Positioner Type 4060 pneumatic positioner Type 4070 electro-pneumatic positioner w/FM and CSA intrinsic safety approvals w/CENELEC intrinsic safety approvals 2 Feedback Lever Arm Ass’y 3 Instrument Gauge Triple scale 0–30 psi/2 bar/0.2 MPa 4 Supply Gauge Triple scale 0–160 psi/11 bar/1.1 MPa 5 Output Gauge Triple scale 0–160 psi/11 bar/1.1 MPa 6 Output Gauge Triple scale 0–160 psi/11 bar/1.1 MPa – – – Test connections (4 req’d) – – – Pilot Valve 7 Mounting kit For size 25 actuators For size 50 actuators

Part Number

1

18B3125X012 18B3126X012 18B3127X012 18B2837X012 11B4036X012 11B4036X032 11B4036X032 11B4036X032 1N908899012 18B2838X012 18B3128X012 18B3129X012

Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. _ Fisher Controls International, Inc. 1999; All Rights Reserved

For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 128461 12 Printed in U.S.A.