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Instruction Manual
D103472X012
Fisher
667NS2 Diaphragm Actuator
™
Size 45, 70, and 80
Contents
Introduction
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Scope of Manual
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Introduction
Scope of Manual
This manual provides installation, adjustment, maintenance, and parts list information for the Fisher 667NS2 actuator
(figure 1). Refer to separate instruction manuals for information regarding the control valve and accessories.
Do not install, operate, or maintain 667NS2 actuators without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property
damage, it is important to carefully read, understand, and follow all the contents of this manual,
including all safety cautions and warnings. If you have any questions about these instructions, contact
your
Emerson sales office
www.Fisher.com
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before proceeding.
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Figure 1. Fisher 667NS2 Actuator with HPNS Valve
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667NS2 Actuator
March 2022
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Table of Contents
Related Manuals for Emerson Fisher 667NS2
Summary of Contents for Emerson Fisher 667NS2
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Page 1: Table Of Contents
Introduction Scope of Manual This manual provides installation, adjustment, maintenance, and parts list information for the Fisher 667NS2 actuator (figure 1). Refer to separate instruction manuals for information regarding the control valve and accessories. Do not install, operate, or maintain 667NS2 actuators without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance. -
Page 2: Description
5. Modified Size 45 Upper Casing Excess Diaphragm Pressure Limit. See table 12, PN GE54328X0A2. 6. EPDM may be used up to 121_C (250_F), but with reduced life. Contact your Emerson sales office for more information. Table 2. Diaphragm Casing Volumes, cm... -
Page 3: Specifications
All torque values given are $5%, unless otherwise specified. See the actuator nameplate for specific information for your actuator. Educational Services For information on available courses for the Fisher 667NS2 actuator, as well as a variety of other products, contact: Emerson Automation Solutions Educational Services - Registration Phone: 1-641-754-3771 or 1-800-338-8158 E-mail: education@emerson.com... -
Page 4: Principle Of Operation
Instruction Manual 667NS2 Actuator March 2022 D103472X012 Principle of Operation The 667NS2 actuator positions the valve plug in response to varying pneumatic loading pressure on the actuator diaphragm. Figure 2 shows the operation of these actuators. The actuator stem moves up as the loading pressure is increased on the bottom of the diaphragm. -
Page 5: Installation
Instruction Manual 667NS2 Actuator D103472X012 March 2022 Lifting Valve/Actuator Assembly To lift the valve/actuator assembly, eyebolts should be used. Insert four 3/8 inch shouldered pattern eyebolts positioned 90 degrees apart on the diaphragm casing flange for size 45 and 70. Use six 7/16 inch shouldered pattern eyebolts positioned 60 degrees apart on the diaphragm casing flange for size 80. - Page 6 Instruction Manual 667NS2 Actuator March 2022 D103472X012 WARNING If the control valve and actuator are installed with the actuator in any position other than vertical, the actuator may not conform with safety‐related qualifications. Nonvertical orientation should be part of existing qualification analysis on file at the plant site to ensure conformance with safety‐related qualifications.
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Page 7: Loading Connection
Instruction Manual 667NS2 Actuator D103472X012 March 2022 4. Place the actuator on top of the valve with the Fisher logo on the same side as the Fisher logo on the bonnet. If the assembly has a Type III drawing, mount the actuator as shown on that drawing. 5. -
Page 8: Bench Set
Instruction Manual 667NS2 Actuator March 2022 D103472X012 2. Tighten the locknuts together, use a wrench on these locknuts, and screw the valve stem either into the stem connector to lengthen travel or out of the stem connector to shorten travel. 3. - Page 9 It is difficult to rotate the spring adjusting screw (key 127, figure 4, 7, or 8) when the full actuator loading pressure is applied to the actuator. Release the actuator loading pressure before adjusting. Then re‐apply loading pressure to check the adjustment. Figure 2. Schematic and Stem Connection Details for Fisher 667NS2 TRAVEL INDICATOR...
- Page 10 Instruction Manual 667NS2 Actuator March 2022 D103472X012 Bench Set Adjustment Ensure that the actuator diaphragm is at the bottom of its travel and not connected to the valve. Note Some spring compression may be required to ensure that the actuator diaphragm is at the bottom of its travel and not connected to the valve.
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Page 11: Installing The Stem Connector Assembly
Remember the freelength and load rate tolerances for the spring may produce a slightly different span than specified. Contact your Emerson sales office for assistance. After replacing the spring, repeat the steps above. -
Page 12: Installing The 1/4 Inch Travel Limit Switch Assembly
Instruction Manual 667NS2 Actuator March 2022 D103472X012 hex cap screws (key 103C). Secure the stem connector assembly with the hex cap screws (key 103C). Torque the cap screws (key 103C) to the value in table 5. Table 5. Stem Connector Torque Specifications Stem Connector Torque Actuator Size N•m... -
Page 13: Deadband Measurement
Instruction Manual 667NS2 Actuator D103472X012 March 2022 5. Attach the travel scale (key 113) with machine screws (key 126). Tighten the screws. 6. Attach the pointer (key 208) with machine screws (key 126). Tighten the screws. 7. Attach the switches and the magnets as shown in figure 6 and as per the TopWorx GO SWITCH Mounting Instruction Manual. -
Page 14: Operation
Instruction Manual 667NS2 Actuator March 2022 D103472X012 Figure 3. Typical Valve Response to Deadband OPENING VALVE UPPER BENCH SET PRESSURE RANGE OF DEADBAND 1 LOWER CLOSING BENCH SET VALVE PRESSURE OPEN CLOSED MID RANGE VALVE TRAVEL NOTE: DEADBAND IS CAUSED BY FRICTION. A6588‐1 Deadband Adjustments 1. -
Page 15: Maintenance
Instruction Manual 667NS2 Actuator D103472X012 March 2022 Maintenance Normally, only the elastomeric parts and the spring of the 667NS2 actuator require inspection or replacement. The maintenance instructions are divided into three subsections: Replacement of Elastomeric Parts, Disassembly, and Assembly. Perform only those steps applicable to the actuator size and required maintenance. It is recommended that the diaphragm and all of the other elastomeric parts of the 667NS2 actuator be inspected every two outages. - Page 16 Instruction Manual 667NS2 Actuator March 2022 D103472X012 2. To aid in assembly, record the position of the spring adjusting screw (key 127) on the actuator stem (key 125). Remove the cap screws (key 194) from the spring adjusting screw (key 127). Thread the spring adjusting screw off the actuator stem until all spring compression is relieved.
- Page 17 Instruction Manual 667NS2 Actuator D103472X012 March 2022 10. Remove the actuator stem with the attached hex nuts (keys 132A and 132B), the upper diaphragm plate (key 107), the diaphragm (key 105), and the lower diaphragm plate (key 108) by carefully sliding the lower end of the actuator stem out of the seal bushing O‐rings (key 117) and lifting the actuator stem with attached parts clear of the diaphragm casing.
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Page 18: Assembly
Instruction Manual 667NS2 Actuator March 2022 D103472X012 11. Remove the set snap ring (key 172). Take the retainer thrust plate (key 165) out of the gear case (key 151). 12. Take out the parts in the following order: the gear retainer, the thrust bearing, the worm gear, and the second thrust bearing (keys 162, 160, 161, and 160). - Page 19 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Note Do not use lubricant on these cap screws and nuts. Fasteners must be clean and dry. 6. Install the upper diaphragm casing (key 104), and secure with the cap screws, washers, and nuts (keys 119, 145, and 120) in the following manner.
- Page 20 Instruction Manual 667NS2 Actuator March 2022 D103472X012 5. Lubricate the guide bushing (key 133) with NyoGel 718B (key 149), as appropriate to the installation. Lubricate the bearing race and bearing (keys 129 and 130) with NyoGel 718B (key 149). 6. Position the spring (key 110), the spring seat (key 121), the lubricated bearing race (key 129) and bearing (key 130), and the lubricated guide bushing (key 133) on top of the diaphragm plate as shown in figure 7.
- Page 21 Instruction Manual 667NS2 Actuator D103472X012 March 2022 disassembly procedures for size 80 actuators. Also, make sure that the spring adjusting screw properly engages the spring seat. Then, using a striking wrench and a dead blow hammer, seat the jam nut with several strong hits until the jam nut does not turn with repeated impacts.
- Page 22 Instruction Manual 667NS2 Actuator March 2022 D103472X012 groove in the outer diameter of the seal bushing (key 116). Place the seal bushing and Orings into the spacer/diaphragm casing assembly (key 167) with the small diameter facing down, and install the snap ring (key 124) above the seal bushing (key 116).
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Page 23: Troubleshooting
Valve does not move Inspect valve, see valve instruction manual. Verify bench set for proper actuator spring load. See Discussion of Bench Set in this instruction manual. Inspect all air connections for leakage. Other Contact Emerson if more assistance is needed. - Page 24 Instruction Manual 667NS2 Actuator March 2022 D103472X012 Figure 4. Fisher Size 45 or 70 667NS2 Actuator APPLY LUB GE49530-G NOTE: KEY 136 SIZE 70 ONLY KEY 190 AND 191 NOT SHOWN...
- Page 25 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Figure 5. Fisher 667NS2 Size 70 Actuator with Yoke Spacer GG41025-A PARTS NOT SHOWN: KEY 190, 191...
- Page 26 Instruction Manual 667NS2 Actuator March 2022 D103472X012 Figure 6. Limit Switch Mounting Assembly for Fisher 667NS2 Size 70A Actuator, ¼ Travel LIMIT SWITCH MAGNET MAGNET LIMIT SWITCH NOTE: KEY 187 NOT USED GG41024-A...
- Page 27 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Figure 7. Fisher Size 80 667NS2 Actuator APPLY LUB NOTE: KEY 190 AND 191 NOT SHOWN GE49532-H...
- Page 28 Instruction Manual 667NS2 Actuator March 2022 D103472X012 Figure 8. Fisher Size 80 667NS2 Actuator with Side-Mounted Handwheel APPLY LUB NOTE: KEY 190 AND 191 ARE NOT SHOWN GE52757-F...
- Page 29 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Figure 9. Fisher Size 80 667NS2 Actuator Side-Mounted Handwheel APPLY LUB GE52718-F...
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Page 30: Parts Ordering
WARNING Use only genuine Fisher replacement parts. Components that are not supplied by Emerson should not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the performance of the valve, and could cause personal injury and property damage. - Page 31 Cycled parts will exhibit wear over time. Based on experience and Does not exhibit a Seal Bushing (Key 116), Refer to Non-Safety testing, Emerson recommends replacing this component every 12 tendency to Bushing (Key 133) following table Related years.
- Page 32 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Table 10. Key 102 Yoke Mounting Nuts ACTUATOR SIZE QUANTITY STUD SIZE, INCH PART NUMBER MATERIAL 3/4-10 1A352024072 SA 194 2H 80C with Hand Operation 7/8-9 1C1727X1122 1. If a yoke spacer is being used, an additional 8 nuts will be needed to mount it to the valve body. Table 11.
- Page 33 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Table 16. Key 108 Lower Diaphragm Plate and Key 195 Hex Socket Cap Screw KEY 108 LOWER DIAPHRAGM PLATE ACTUATOR SIZE KEY 195 CAP SCREW PART NUMBER PART NUMBER GE57684X012 1V1542X0012 GE57287X012 10A3869X012 16A0858X012 Table 17.
- Page 34 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Table 21. Key 113 and 126 Travel Scale and Machine Screw VALVE TRAVEL KEY 113 TRAVEL SCALE KEY 126 MACHINE SCREW ACTUATOR SIZE PART NUMBER PART NUMBER Inch 0.75 1E808138992 59081160X12 0.25 1L998338992 1A3451X0012 0.75 1H745738992...
- Page 35 Instruction Manual 667NS2 Actuator D103472X012 March 2022 Table 27. Key 125 Actuator Stem and Key 193 O-ring KEY 125 ACTUATOR STEM KEY 193 O-RING ACTUATOR SIZE CASING LENGTH PART NUMBER PART NUMBER GE57682X012 1H9938X0092 GE57285X012 Standard GE45644X012 Long GE45645X012 Standard GH05589X022 Long GG48672X012...
- Page 36 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.