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Instruction Manual

D102603X012

667NS Actuator

June 2018

7

Figure 1. Schematic and Stem Connection Details for Fisher 667NS

SPRING
PUSHES
DOWN

AIR
LIFTS

SCHEMATIC

SIZES 40 AND 45

YOKE

TRAVEL
INDICATOR

SPRING
ADJUSTOR

STEM
CONNECTOR

TRAVEL
INDICATOR
DISK

VALVE
STEM

YOKE

YOKE

YOKE

TRAVEL
INDICATOR

TRAVEL
INDICATOR

SPRING
ADJUSTOR

TRAVEL
INDICATOR
DISK

STEM
CONNECTOR

VALVE
STEM

VALVE
STEM

SIZE 70

SIZE 80

STEM CONNECTION

DETAILS

TRAVEL
INDICATOR
POINTER

VENT

DIAPHRAGM
CASING

ACTUATOR
VALVE
STUDS
AND NUTS

FISHER
DBQ-NS
VALVE

A3833‐A

55A9191‐H

55A9193‐F

56A1032‐D

A5958/MM1

C0762‐1

STEM
LOCKNUTS

STEM
LOCKNUTS

STEM
LOCKNUTS

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Содержание Fisher 667NS

Страница 1: ... list information for the Fisher 667NS actuator Refer to separate instruction manuals for information regarding the control valve and accessories Do not install operate or maintain 667NS 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 a...

Страница 2: ...he Specifications portion of the Introduction section Do not exceed maximum allowable valve stem load when applying maximum allowable thrust 2 Maximum diaphragm casing pressure must not be exceeded and must not produce a force on the actuator stem greater than the maximum allowable actuator output thrust or the maxi mum allowable stem load 3 The pressure and temperature limitations in this manual ...

Страница 3: ...nal Services Registration Phone 1 641 754 3771 or 1 800 338 8158 E mail education emerson com emerson com fishervalvetraining Maximum Pressure Limitations The casing and diaphragm of 667 actuators are pressure operated This air pressure provides energy to compress the spring to stroke the actuator and lift the diaphragm away from the valve The following explanations describe the maximum pressure l...

Страница 4: ...two pressures Installation The diaphragm actuator is normally shipped mounted on a valve body Follow the valve body instructions when installing the control valve in the pipeline WARNING Always wear protective gloves clothing and eyewear when performing any installation operations to avoid personal injury Check with your process or safety engineer for any additional measures that must be taken to ...

Страница 5: ...e the stem connector before rechecking the bench set 6 Refer to the actuator nameplate to determine the bench set pressure range of the actuator Reduce actuator loading pressure to the lower end of the bench set range For size 80 remove the cap screw key 91 figure 4 and remove the adjusting screw cover key 84 figure 4 Rotate the spring adjustor key 74 figure 2 for sizes 40 and 45 key 74 figure 3 f...

Страница 6: ... the valve bonnet 3 Insert the cap screws and tighten the hex nuts not shown securing the actuator to the bonnet Tighten the cap screws to the torque in table 4 Note Before turning the spring adjuster on size 70 or 80 actuators assemble the stem connector around the actuator stem and the anti rotating lug on the yoke Mark the actuator stem as a visual reference to verify that stem rotation does no...

Страница 7: ...STOR STEM CONNECTOR TRAVEL INDICATOR DISK VALVE STEM YOKE YOKE YOKE TRAVEL INDICATOR TRAVEL INDICATOR SPRING ADJUSTOR TRAVEL INDICATOR DISK STEM CONNECTOR VALVE STEM VALVE STEM SIZE 70 SIZE 80 STEM CONNECTION DETAILS TRAVEL INDICATOR POINTER VENT DIAPHRAGM CASING ACTUATOR VALVE STUDS AND NUTS FISHER DBQ NS VALVE A3833 A 55A9191 H 55A9193 F 56A1032 D A5958 MM1 C0762 1 STEM LOCKNUTS STEM LOCKNUTS ST...

Страница 8: ... of parts do not loosen the cap screws when the stem connector has spring or loading pressure force applied to it 9 Raise the travel indicator disk to the stem connector sizes 40 through 70 only For all sizes thread the stem locknuts against the stem connector 10 Remove all actuator loading pressure Move the travel indicator scale so that the indicator disk or pointer is in line with the bottom ma...

Страница 9: ...tem either into the stem connector to lengthen travel or out of the stem connector to shorten travel 3 Cycle the actuator to check the travel If travel is not equal to the specified travel adjust and check travel until correct Tighten the stem connector cap screws when correct travel is obtained 4 Raise the travel indicator disk by threading the stem locknuts against the stem connector Spring Disc...

Страница 10: ... pressure readings psig X Effective diaphragm area inches2 Refer to table 1 and 5 for the effective diaphragm area When determining valve friction you can make diaphragm pressure readings at a travel position other than mid travel if you desire If you take readings at the zero or at the full travel position take extra care to ensure that the readings are taken when the travel just begins or just s...

Страница 11: ...lve body creates a force on the valve plug that has a direct effect on the actual operating diaphragm pressure range In some instances the valve may not stroke completely over the indicated range because the pressure conditions in the body are different from those for which the control valve has been set at the factory A simple spring adjustment however may be all that is required to obtain correc...

Страница 12: ...with your process or safety engineer for any additional measures that must be taken to protect against process media Replacement of Elastomeric Parts Size 40 45 and 70 Actuators Perform the following if you are replacing only the elastomeric parts of the 667NS actuator and no other maintenance is necessary The diaphragm the gasket and the seal bushing O rings are the only elastomeric parts in the ...

Страница 13: ...eakage but not crush the material Perform the following tightening sequence with a manual torque wrench for size 40 45 and 70 actuators CAUTION Overtightening the diaphragm casing cap screws and nuts keys 13 and 14 can damage the diaphragm Do not exceed a torque of 27 NSm 20 lbfSft when performing the following tightening procedure Note Do not use lubricant on these cap screws and nuts Fasteners m...

Страница 14: ... diaphragm casing key 64 the gasket key 70 and the yoke cap Lift out the spring key 18 Size 80 Actuators Key number references are shown in figure 4 1 Remove the cap screws key 91 and the adjusting screw cover key 84 2 Unscrew the hex nuts keys 85 and 86 from the actuator stem key 93 Record the position of the spring adjustor key 74 relative to the spring case key 92 Loosen the spring adjustor loc...

Страница 15: ... yoke Secure with the snap ring key 72 5 Assemble the actuator stem key 144 the lower diaphragm plate key 71 the diaphragm key 3 the upper diaphragm plate key 4 and the diaphragm plate cap screw and spacer keys 12 and 2 Tighten the cap screw to the torque value indicated in table 3 then place this assembly in the actuator Take care when pushing the actuator stem through the seal bushing so that th...

Страница 16: ...fill the seal bushing with lithium grease key 99 or high temperature radiation resistant polyphenyl ether grease key 100 or equivalent as appropriate to the installation Place the seal bushing and O rings into the yoke and install the snap ring key 72 3 To aid in assembling the actuator stem key 93 and associated parts keys 94 4 3 and 71 attach the stem connector assembly key 31 onto the actuator ...

Страница 17: ...ighten in a circular pattern around the bolt circle to the final torque value that is specified in table 6 for the diaphragm material being used 14 Once completed no more tightening is recommended 15 Lubricate the spring adjustor key 74 threads and the bearing race and bearing with lithium grease Thread the spring adjustor key 74 into the spring case assembly so that the spring adjustor matches th...

Страница 18: ...0 16 req d Size 45 20 req d Size 70 28 req d Size 80 36 req d 14 Hex Nut pl steel Size 40 16 req d Size 45 20 req d Size 70 28 req d Size 80 36 req d 17 Vent Assembly Size 40 45 70 and 80 18 Spring 19 Spring Seat zn pl steel Size 40 45 70 and 80 27 Connector steel for casing mounted handwheel Size 40 45 and 70 Key Description 30 Cap Screw pl steel Size 40 6 req d Size 45 8 req d Size 70 12 req d S...

Страница 19: ...x Nut steel 2 req d 95 Travel Stop steel 3 req d Key Description 96 Gasket composition nitrile 97 Guide Bushing brass 98 Machine Screw pl steel 2 req d 99 Lithium grease not furnished with actuator 100 High temperature radiation resistant polyphenyl ether grease not furnished with actuator 101 Pipe Plug steel for yoke cap connection only sizes 40 45 102 Jam Nut pl steel size 40 45 and 70 144 Actua...

Страница 20: ...Instruction Manual D102603X012 667NS Actuator June 2018 20 Figure 2 Size 40 or 45 Fisher 667NS Actuator APPLY LUB 55A9191 H I00 70 I00 ...

Страница 21: ...Instruction Manual D102603X012 667NS Actuator June 2018 21 Figure 3 Size 70 Fisher 667NS Actuator APPLY LUB 55A9193 F I00 70 70 ...

Страница 22: ...Instruction Manual D102603X012 667NS Actuator June 2018 22 Figure 4 Size 80 Fisher 667NS Actuator APPLY LUB 56A1032 D ...

Страница 23: ...Instruction Manual D102603X012 667NS Actuator June 2018 23 ...

Страница 24: ...ich are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice E 1979 2018 Fisher Controls International LLC All rights reserved 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 trade...

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