Powers 593 User Manual

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• Up to 1380 lbs. of force

• Excellent range control

• Accurate repetitive positioning

• Dual NAMUR Accessory Mounts

• Field Reversible

• “Long-life” design lasts over one million cycles

46” Actuator

Powers’ most popular actuator is

powerful, durable, and versatile.

TABLE OF CONTENTS

Features . . . . . . . . . . . . . . . . . . . . . . . .2

Description . . . . . . . . . . . . . . . . . . . . .3

Guide to Applications . . . . . . . . . . . . .3

Operation . . . . . . . . . . . . . . . . . . . . . .3

Installing an Actuator . . . . . . . . . . . . .4

Changing Springs . . . . . . . . . . . . . .4-5

Changing Action . . . . . . . . . . . . . . .6-7

Preload . . . . . . . . . . . . . . . . . . . . . . . .8

Replacing a Diaphragm . . . . . . . . .9-10

Parts List . . . . . . . . . . . . . . . . . . .11-13

Spring Range Matrix . . . . . . . . . . . . .13

Modiﬁcation Data Table . . . . . . .14-16

TI-593-672

1. Optional stainless steel springs extend operating life to over one million cycles.

2. Nested spring design creates a uniform stroke by eliminating spring side ﬂex.

3. 316 Stainless steel thrust plate is corrosion resistant.

4. All stainless steel hardware used in combination with SS spring makes long-life standard.

5. Molded ﬁber and reinforced diaphragm greatly reduces the risk of stress cracks.

6. Rolling diaphragm design allows for even pressure during the stroke cycle making for more precise control.

7. Field reversible design makes changing the fail-safe mode possible.

8. With *extended nut hardware, preload can be safely released for inspection.

9. Dual NAMUR mounts can be used to quickly add or reorient accessories.

FEATURES

DESCRIPTION

Powers’ most popular actuator, the ‘46’, is a versatile, ﬁeld reversible design that is available on most Flowrite II valves. This actuator provides:

• large effective area (1380 lbs of force at 30 psi) for powerful valve close control

• excellent narrow range control signal performance

• accurate repetitive positioning due to large diameter diaphragm, low friction actuator stem and bronze bearings, and

• dual NAMUR accessory mounts.

The 46 actuator and Flowrite II valves are designed to integrate intro a highly flexible system. It is possible through the Flowrite II 46” actuation system to adapt to changing application requirements by reconfiguring the actuator through simple spring changes, stem changes, etc. The purpose of these instructions is to suggest solutions to meet your applications needs.

OPERATION

The actuator springs provide the necessary force to hold the stem in the lowered or raised position. On a Normally Open valve (ATC, D/A) assembly, the stem will start its downward stroke whenever the control air pressure applied against the actuator diaphragm area and upper housing exceeds the holding force of the springs. A further increase in control air pressure will initiate a continued downward travel of the valve stem until the valve has completed its stroke.

On a Normally Closed valve (ATO) assembly, the valve stem will start its upward stroke whenever the control air pressure applied against the actuator diaphragm area and the lower housing exceeds the holding force of the springs. A further increase in control air pressure will initiate a continued upward travel of the valve stem until the valve has completed its stroke. The air pressure change to initiate full stem travel is known as the throttling range or spring span. Standard spring span is equal to 8 psi (55 kPa) with no drop across the valve. This throttling range is based on typical system pressure and will vary slightly as the pressure drop across the valve changes. A decrease in pressure at the diaphragm will initiate an upward movement on a normally open valve assembly and a downward movement on a normally closed valve assembly. When the valve is at its wide open position, the disc and throttling plug are farthest from the seat and there is maximum ﬂow through the valve. Valve actuators equipped with a pilot positioner can utilize full control air pressure at any point in the stem travel to initiate stem movement or to maintain stem position. However, the actuator springs still provide the necessary force to move the stem in the opposite direction. Use of a positioner will tend to provide faster response and to ensure repeatability of stem position regardless of the load on the actuator. However, in a system where available pressure and flow requirements are relatively consistent, control valves can usually perform adequately without a positioner.

GUIDE TO APPLICATIONS

To reverse actuator action, i.e., change an NO to an NC valve, or an NC to an NO valve:

1. Refer to the Modiﬁcation Tables for correct replacement parts.

2. Follow instructions for Reversing Actuator Action.

3. Follow instructions for Preload Adjustment.

To attempt valve sequencing with a 3-15 psi air signal OR to set a NC valve assembly at a higher preload to maintain closeoff or to increase the throttling range:

1. Refer to the Modiﬁcation Tables for correct replacement parts.

2. Refer to Changing Springs.

3. Follow instructions for Preload Adjustment.

4. Use dimensions in the Spring Range Matrix.

To modify the actuator action, i.e., using the same actuator on a different valve body or size:

1. Refer to Modiﬁcation Tables for correct replacement parts.

2. Refer to Changing Springs.

3. Refer to Changing Action (changing stems).

4. Follow instructions for Preload Adjustment.

5. Use dimensions in the Spring Range Matrix.

To install an actuator on a valve and set the preload adjustment:

1. Follow Installing Actuator instructions.

2. Refer to Modiﬁcation Tables for correct replacement parts.

3. Follow instructions in Preload Adjustment.

To replace a ruptured diaphragm:

1. Refer to Replacing the Diaphragm instructions.

CHANGING SPRINGS (DIRECT ACTING ACTUATORS)

Springs can be changed or added if a higher shutoff rating is required. This may become necessary under the following conditions:

1. If the pressure of the medium passing through the valve increases,

2. If the valve size increases due to an increase in process demand, or

3. If valve body type is changed. The Modification Data Tables (page 13-15) provide dimensional data including part numbers, and number of springs required to reconﬁgure an actuator. Springs may be changed with the actuator assembled or removed from the valve. For ease of instruction, pictures are shown with actuators removed.

To change or add springs on a Direct Acting (DA, NO, ATC) actuator assembled to the valve, follow steps 1, 2, 3, 4A, 5-10.

To change or add springs on a Direct Acting (DA, NO, ATC) actuator removed to the bench, follow steps: 1-4A, 5-9.

To change or add springs on a Direct Acting (DA, NO, ATC) actuator assembled to the valve and under preload, follow steps: 1, 3, 4B, 5-10.

1. Shut off controlled medium supply (steam, water, or other liquid).

2. Reduce preload on the springs (refer to Decreasing Preload

on DA Actuators pg. 7).

3. Remove the control signal to the actuator.

4A. (Fig. 1) Remove top housing nuts and bolts or (see above) 4B. (Fig. 1) Remove the three bolts attached to the short nuts,

then equally release the bolts attached to the long nuts.

CAUTION: Springs under tension.

5. (Fig. 2A) Remove upper housing.

6. Remove stem nut, silver and black washers (Fig. 2B).

7. Remove diaphragm, and thrust plate (Fig. 2C).

8. Change or add springs as needed (Fig. 3A & 3B). Make sure

the springs are properly placed over the spring guides and their conﬁguration is symmetrical.

9. Reassemble parts in reverse order, then attach upper housing.

10. Adjust preload ref.

NOTE: Some actuator models have small springs nested inside the larger springs. The small springs also ﬁt over spring guides and must also be placed symmetrically.

Fig 1 - Remove Housing Bolts *(extended versions last and gradually)

Fig 2A - Remove Upper Housing

Fig 2B - Remove Stem Nut, & Washers

INSTALLING AN ACTUATOR

1. Place actuator assembly over valve stem. With actuator stem and valve stem separated, place bonnet lock nut over valve stem onto bonnet.

2. Apply air pressure to the actuator approximately 9 psi for a Normally Closed valve assembly, and 3 psi for a Normally Open Assembly.

3. Tighten the valve stem to the actuator stem by rotating the valve stem (NOT THE ACTUATOR STEM).

4. Tighten the two locknuts together and rotate them clockwise. Tighten the nuts to achieve the proper PRELOAD (as explained in the Preload Section).

5. Remove air pressure.

6. Tighten the bonnet locknut on the bonnet (Fig.1).

Fig 1 - Tighten the Bonnet Lock Nut on the Bonnet

CHANGING SPRINGS (REVERSE ACTING ACTUATORS)

Springs may be changed with the actuator assembled or removed from the valve. For ease of instruction, pictures are shown with actuators removed.

To change or add springs on a Reverse Acting (RA, NC, ATO) actuator assembled to the valve, follow steps 1-4A, 5-8.

To change or add springs on a Reverse Acting (RA, NC, ATO) actuator removed to the bench, follow steps: 1-4A, 5-7.

To change or add springs on a Reverse Acting (RA, NC, ATO) actuator assembled to the valve and under preload, follow steps: 1, 3, 4B, 5-8.

1. Shut off controlled medium supply (steam, water, or other liquid).

2. Reduce preload on the springs (refer to Decreasing Preload on DA Actuators pg. 7).

3. Remove the control signal to the actuator.

4A. (Fig. 1) Remove top housing nuts and bolts or (see above). 4B. (Fig. 1) Remove the three bolts attached to the short nuts,

then equally release the bolts attached to the long nuts.

CAUTION: Springs under tension.

5. (Fig. 2A) Remove upper housing.

6. Add or remove springs as needed for new conﬁguration

(Fig 3A &Fig. 3B). Make sure the springs are properly placed over the spring guides and their conﬁguration is symmetrical.

NOTE: Some actuator models have small springs nested inside the larger springs. The small springs also ﬁt over spring guides and must also be placed symmetrically.

7. Reassemble upper housing.

NOTE: Assemble bolts with long nuts ﬁrst.

8. Adjust preload ref pg. 7.

Fig 1 - Remove Housing Bolts

Fig 2- Remove Upper Housing

Fig 3A - Typical 3-Spring Installation NOTE: *Number required may vary. Refer to page 14-15.

Fig 3A - Typical 4-Spring Installation

Fig 2C - Remove Diaphragm, Thrust Plate

Fig 3A - Typical-Spring Installation

Springs

CHANGING ACTION (DIRECT ACTING ACTUATORS)

All valve bodies used with Flowrite II Actuators are push-to-close. Directing Acting actuators make the valve action Normally Open (NO, DA, ATC); Reverse Acting actuators make the valve action Normally Closed (NC, RA, ATO). Changing the action of the actuator (DA to RA or RA to DA) will therefore reverse the valve action from NO to NC, or NC to NO. To change the actuator action, you change the stem and reverse the order of the spring, diaphragm and thrust plate assembly.

Change Actuator Action from DA to RA or NO to ATC or NC to ATO:

1. Shut off controlled medium supply (steam, water, or other liquid).

2. Reduce preload on the springs (refer to Decreasing Preload

on DA Actuators).

3. Remove the control signal to the actuator.

4. Remove top housing nuts and bolts.

5. Remove upper housing. Remove stem nut, silver and black

washer. (Fig 2A).

6 Remove diaphragm, thrust plate and springs (Fig. 2B).

7. Hold the actuator stem in place and loosen the valve stem

locknuts (turn locknuts counterclockwise a number of times).

8. Hold actuator stem and tighten the two lock nuts together. Turn the locknuts counterclockwise to rotate the valve stem

until the two stems are separated. (Fig. 3)

9. Pull actuator stem upward and remove from assembly

(Fig. 4).

10. Replace with RA actuator stem. Position stem with ﬂats

pointing downward.

11. Thread valve stem into actuator stem by turning the locknuts

clockwise. Tighten by hand.

12. Place black washer on actuator stem. Invert diaphragm and

place inside of lower housing over the black washer. Invert thrust plate and place on top of diaphragm. (Fig. 5)

13. Replace silver washer and tighten stem nut.

14. Place springs on thrust plate in same orientation as found in

lower housing. Properly seat springs over spring guides

(Fig. 6).

15. Replace upper housing assembly and tighten housing nuts

and bolts. (Fig. 1)

16. Connect control signal to 1/4" NPT ﬁtting located on

bottom of actuator housing.

17. Adjust the preload per instructions on pg. 7.

Fig 1 - Remove Housing Bolts Fig 2A - Remove Upper Housing,

Stem, Nut and Washers

Fig 2B - Remove Diaphragm and Thrust Plate

Fig 3 - Loosen Stem Locknuts

Fig 4 - Remove Stem Fig 5 - Reverse Replacement of

Diaphragm and Thrust Plate

Fig 5 - Reverse Replacement of Diaphragm and Thrust Plate. Four (4) springs shown. See note on page 5.

CHANGING ACTION (REVERSE ACTING ACTUATORS)

Change Actuator Action from RA to DA:

1. Shut off controlled medium supply (steam, water, or other liquid).

2. Reduce preload on the springs (refer to Decreasing Preload on RA Actuators).

3. Remove the control signal to the actuator.

4. (Fig. 1) Use a 1/2" wrench on the top housing bolts and hold the bottom housing nuts with a 9/16" wrench.

5. (Fig. 2A) Remove upper housing.

6. Remember the orientation of springs on the thrust plate.

Remove springs, stem nut (Fig. 2B)...

7. …silver washer, thrust plate, diaphragm, & black washer (Fig. 2C).

8. Hold the actuator stem in place and loosen the valve stem

locknuts (turn locknut counterclockwise a number of times).

9. Hold actuator stem and tighten the two lock nuts together.

Turn the locknuts counterclockwise to rotate the valve stem until the two stems are separated. (Fig. 3)

10. Pull actuator stem upward and remove from assembly. (Fig. 4).

11. Replace with DA actuator stem. Position stem with ﬂats

pointing downward.

12. Thread valve stem into actuator stem by turning the locknut clockwise. Tighten by hand.

13. Place springs in lower housing in same orientation as found on thrust plate. Properly seat springs over the spring guides

14. Invert thrust plate and place on top of springs. Invert diaphragm and place on top of thrust plate (Fig. 5).

15. Replace black washer, place silver washer on top of black washer, and tighten stem nut (Fig. 6).

16. Replace upper housing assembly and tighten housing nuts and bolts (Fig. 1).

17. Connect control signal to 1/4" NPT ﬁtting located on the

top of the actuator housing.

18. Adjust the preload per instructions on pg. 7.

Fig 1 - Remove Housing Bolts Fig 2A - Remove Upper

Housing to Expose Springs (4 Shown)

Fig 2B - Remove Springs, Stem Nut

Fig 3 - Loosen Stem Locknuts Fig 4 - Remove and Replace

Stem

Fig 5 - Replace Springs, Reversed Thrust Plate and Diaphragm

Fig 2C - Remove Washers, Thrust Plate, Diaphragm

Fig 6 - Replace Washers, Tighten Stem Nut

PRELOAD

The Normally Closed (NC, RC, ATO) valve assembly uses the springs to hold the valve shut, against the upstream pressure attempting to push the plug open.

1. All Normally Closed valve assemblies are factory set to a nominal preload depending on size of 7-10 psi.

2. If your process requires a high air pressure signal (>7 psi) to start the valve moving, it is necessary to decrease the actuator preload. Adjust the preload so that the valve is fully closed with the minimum air signal and fully open with the maximum air signal.

3. It is a characteristic of an unbalanced valve that as the pressure drop across the valve increases, the effective spring range increases. Consult one of our application engineers if you have any questions about your particular application.

The Normally Open (NO, DA, ATC) valve assembly uses the actuator springs to hold the valve open, and the upstream pressure helps to hold the valve open.

1.If the maximum air signal applied to the valve does not allow the valve to shut off tightly, decrease the preload.

2.If the valve starts closing at too low of an air signal, increase the preload. The preload should be adjusted so that control air pressure closes the valve tightly, and stem movement starts at an acceptable point.

3. In some applications where a wide range of ﬂow conditions are encountered, it is desirable to install two valves in parallel and sequence them.

Preload adjustment (also called spring tension adjustment) is required under the following conditions:

1. The valve and actuator stem have been disengaged. (for packing

changes, stem changes, maintenance of valve assembly, etc.)

2. The action of the valve assembly has been reversed.

3. Valve sequencing is required. (Use of a positioner is

recommended if using a 3–15 psi control signal.)

4. Line pressure force exceeds the spring holding force on a

normally closed (NC) valve assembly, which causes the valve to

open with less than 7 psi signal preload.

5. Line pressure force adds to the spring holding force on a

normally open (NO) valve assembly, which causes the valve to

start closing at a preload greater than 3 psi signal Deviation from this recommended preload setting will affect your process. A higher preload setting requires a higher air signal at the diaphragm to start stroking the valve. If the preload is too high, with a given air signal a Normally Open valve will not close completely, and a Normally Closed valve will not open completely to overcome the initial preload setting.

To decrease preload on RA actuators or increase preload on DA actuators:

1. To prevent the plug and seat from scoring, lift the valve plug off the seat before adjusting the preload by applying air pressure to the actuator, approximately 9 psi for a Normally Closed valve assembly, and 5 psi for a Normally Open Assembly.

2. Hold the actuator stem in place (DO NOT turn actuator stem during this process) and loosen the valve stem locknut by turning the locknuts counterclockwise a number of times.Press the two locknuts together.

3. Hold the actuator stem in place (DO NOT turn the actuator stem), turn the valve stem clockwise and retighten the locknut.

(Fig. 1).

To increase preload on R.A. actuators or decrease preload on D.A. actuators:

1. To prevent the plug and seat from scoring, lift the valve plug off

the seat before adjusting the preload by applying air pressure to the actuator, approximately 10 psi for a Normally Closed valve assembly, and 5 psi for a Normally Open Assembly.

2. Hold the actuator stem in place (DO NOT turn actuator stem during this process) and loosen the valve stem locknuts by turning the locknuts counterclockwise a number of times. Press the two locknuts together.

3. Hold the actuator stem in place (DO NOT turn the actuator

stem), turn the valve stem locknuts counter-clockwise and retighten the locknut (Fig. 1).

Fig 1 - Rotate Lock Nuts to Adust Preload

REPLACING A DIAPHRAGM (DIRECT ACTING ACTUATORS)

The diaphragm can be changed with the actuator assembled or removed from the valve. For ease of instruction pictures are shown with actuators removed.

To change a diaphragm on a Direct Acting (DA, NO, ATC) actuator assemble to the valve follow steps: 1-4A, 5-9.

To change a diaphragm on a Direct Acting (DA, NO, ATC) actuator removed to the bench follow steps: 1-4A, 5-8.

To change a diaphragm of a Direct Acting (DA, NO, ATC) actuator assemble to the valve and under preload follow steps: 1-3, 4B, 5-9.

1. Shut off controlled medium supply (steam, water, or other liquid) and remove the control signal to the actuator.

2. Reduce preload on the springs (refer to Decreasing Preload on DA Actuators), see pg. 7.

3. Remove the control signal from the actuator.

4A. (Fig. 1) Remove top housing nuts and bolts or (see above) 4B. (Fig. 1) Remove the three bolts attached to the short nuts, then

equally release the bolts attached to the long nuts.

CAUTION: Springs under tension.

5. Remove upper housing (Fig. 2)

6. Remove stem nut, washer and diaphragm. (Fig. 3)

7. Place new diaphragm over thrust plate. Make sure that the lip of the diaphragm is seated properly in the groove of the actuator housing.

8. Reassemble in reverse order.

NOTE: Assemble bolts with long nuts ﬁrst.

9. Adjust preload, refer to pg. 7.

Fig 1 - Remove Housing Bolts Fig 2 - Remove Stem Nut, and

Washers

Fig 3 - Remove Diaphragm (Leave Thrust Plate On).

REPLACING A DIAPHRAGM (REVERSE ACTING ACTUATORS)

The diaphragm can be changed with the actuator assembled or removed from the valve. For ease of instruction pictures are shown with actuators removed.

To change a diaphragm on a Reverse Acting (RA, NC, ATO) actuator assemble to the valve follow steps: 1-4A, 5-10.

To change a diaphragm on a Reverse Acting (RA, NC, ATO) actuator removed to the bench follow steps: 1-4A, 5-9.

To change a diaphragm of a Reverse Acting (RA, NC, ATO) actuator assemble to the valve and under preload follow steps: 1-3, 4B, 5-10.

1. Shut off controlled medium supply (steam, water, or other liquid) and remove the control signal to the actuator.

2. Reduce preload on the springs. Follow procedures for Decreasing Preload on DA Actuators on pg. 7.

3. Remove the control signal to the actuator. 4A. (Fig 1) Remove top housing nuts and bolts or see above 4B. (Fig 1) Remove the three bolts attached to the short nuts, then

equally release the bolts attached to the long nuts.

CAUTION: Springs under tension.

5. Remove upper housing (Fig 2).

6. Remember the orientation of the springs. Remove springs, stem nut...(Fig. 3).

7. ...silver washer, thrust plate, diaphragm, & black washer

(Fig. 4).

8. Replace with new diaphragm. Make sure the lip of the diaphragm is seated properly in the groove of the actuator housing.

8. Reassemble in reverse order.

NOTE: Assemble bolts with long nuts ﬁrst.

10. Adjust preload, refer to pg. 7.

Fig 1 - Remove Housing Bolts Fig 2 - Remove Upper Housing, Remove

Springs (4 Shown)

Fig 3 - Remove Stem Nut...

Fig 4 - Remove Thrust Plate and Old Diaphragm

PARTS LIST - DA ACTUATOR

ITEM PART NUMBER QUANTITY PART DESCRIPTION

1 See Chart 1 Yoke (Cast Iron) 2 672-632A 1 Top Housing Machined 3 672-633A 1 Bottom Housing Machined 4 See Chart 1 Stem, D.A. 5 081-008 3 Nut, Housing 6 080-033 3 Bolt, Housing 7 672-646 See Chart Spring, Small 8 672-645 See Chart Spring, Large 9 672-626 1 Diaphragm 10 672-627 1 Thrust Plate, Steaming 11 672-618E 1 Bushing, Stem 12 084-015 2 “O” Ring 13 672-470A 1 Label Warning 14 043-009C 1 Cap Plug, 1/4” 15 082-005R 1 Washer, Stem 16 081-011 1 Nut, Stem 17 080-034 4 Bolt, Yoke 18 082-005 1 Washer, Stem 19 087-128 1 Vent Plug, 1/4” NPT 20 672-641 1 Bearing, Stem 22 672-620 1 Nameplate 23 See Chart 1 Locknut 24 900-326 3 Nut, Coupling 5/16 -18x2 25 900-327 3 Bolt, 5/16-18 x 3LG

CURRENT STD. SPRINGS STD. SPRINGS SS. SPRINGS SS. SPRINGS ACTUATORS 672-642 672-615 672-645 672-646 STEM YOKE LOCK NUT

672022D 2 2 0 0 672-636 672-724 625-008 672033D 6 0 0 0 672-636 672-724 625-008 672044D 4 4 0 0 672-636 672-724 625-008 672601D 6 6 0 0 672-636 672-724 625-008 672602D 0 3 0 0 672-636 672-724 625-008 672603D 3 0 0 0 672-636 672-724 625-008 672604D 4 0 0 0 672-636 672-724 625-008 672605D 0 4 0 0 672-636 672-724 625-008 672606D 6 0 0 0 672-636 672-724 625-008 672607D 0 6 0 0 672-636 672-724 625-008 672651D 6 6 0 0 672-614 672-725 625-008 672653D 3 0 0 0 672-614 672-725 625-008 672654D 4 0 0 0 672-614 672-725 625-008 672655D 0 4 0 0 672-614 672-725 625-008 672656D 6 0 0 0 672-614 672-725 625-008 672657D 0 6 0 0 672-614 672-725 625-008 672666D 0 4 0 0 672-636B 672-725 625-008 672670D 0 6 0 0 672-636B 672-725 625-008 672671D 0 6 0 0 672-614B 672-725 625-008 672672D 0 4 0 0 672-614B 672-725 625-008 672726D 0 6 0 0 672-634 672-725 625-008 672727D 0 4 0 0 672-634 672-725 625-008 672728D 0 6 0 0 672-634 672-725 625-008 672-460D 0 0 0 3 672-636 672-724 625-008 672-474D 0 0 0 4 672-636 672-724 625-008 672-647D 0 0 0 6 672-636 672-724 625-008 672-474D 0 0 0 4 672-636 672-724 625-008 672-457D 0 0 0 6 672-636 672-724 625-008 672-461D 0 0 0 4 672-636 672-724 625-008 672-462D 0 0 0 6 672-636 672-724 625-008 672-463D 0 0 0 6 672-636 672-724 625-008 672-464D 0 0 0 6 672-636 672-724 625-008 672-648D 0 0 6 6 672-636 672-724 625-008 672-647D 0 0 6 0 672-636 672-724 625-008 672-474D 0 0 4 0 672-636 672-724 625-008 672-467D 0 0 4 4 672-636 672-724 625-008 672-465D 0 0 6 0 672-614B 672-725 625-008 672-466D 0 0 6 0 672-618E 672-725 625-008 672-469D 0 0 6 0 672-634 672-725 625-008 672-468D 0 0 6 0 672-634 672-725 625-008

Notes:

1. For other spring replacements, make sure that springs are arranged symemtrically to ensure proper balance for the actuator.

2. Soak "O" rings in silicone oil prior to assembly. Assemble and test per Eng. Spec. Y-672-1.

Apply Removable

Loctite Threadlocker #242

(10-12 ft.-lbs.)

"X"

NOT SHOWN

(10-12 ft.-lbs.)

PARTS LIST - RA ACTUATOR

"X"

ITEM PART NUMBER QUANTITY PART DESCRIPTION

1 See Chart 1 Yoke (Cast Iron) 2 672-632A 1 Top Housing Machined 3 672-633A 1 Bottom Housing Machined 4 See Chart 1 Stem, D.A. 5 081-009 3 Nut, Housing 6 080-033 3 Bolt, Housing 7 672-645 See Chart Spring, Large 8 672-646 See Chart Spring, Small 9 672-626 1 Diaphragm 10 672-627 1 Thrust Plate, Steaming 11 672-618E 1 Bushing, Stem 12 084-015 2 “O” Ring 13 672-471 1 Label Warning 14 043-009C 1 Cap Plug, 1/4” 15 082-005R 1 Washer, Stem 16 081-011 1 Nut, Stem 17 080-034 4 Bolt, Yoke 18 082-005 1 Washer, Stem 19 087-128 1 Vent Plug, 1/4” NPT 20 672-641 1 Bearing, Stem 22 672-620 1 Nameplate 23 See Chart 1 Locknut 24 900-326 3 Nut, Coupling 5/16 -18x2 25 900-327 3 Bolt, 5/16-18 x 3LG

CURRENT STD. SPRINGS STD. SPRINGS SS. SPRINGS SS. SPRINGS ACTUATORS 672-642 672-615 672-645 672-646 STEM YOKE LOCK NUT

672024R 2 4 0 0 672-636A 672-724 628-008 672033R 3 3 0 0 672-636A 672-724 628-008 672044R 4 4 0 0 672-636A 672-724 628-008 672601R 6 6 0 0 672-636A 672-724 628-008 672602R 0 3 0 0 672-636A 672-724 628-008 672603R 3 0 0 0 672-636A 672-724 628-008 672604R 4 0 0 0 672-636A 672-724 628-008 672605R 0 4 0 0 672-636A 672-724 628-008 672606R 6 0 0 0 672-636A 672-724 628-008 672607R 0 6 0 0 672-636A 672-724 628-008 672645R ? 0 0 672-636A 672-724 628-008 672651R 6 6 0 0 672-614A 672-725 628-008 672653R 3 0 0 0 672-614A 672-725 628-008 672654R 4 0 0 0 672-614A 672-725 628-008 672655R 0 4 0 0 672-614A 672-725 628-008 672656R 6 0 0 0 672-614A 672-725 628-008 672657R 0 6 0 0 672-614A 672-725 628-008 672666R 0 4 0 0 672-636D 672-725 628-008 672668R 0 4 0 0 672-634B 672-724 628-008 672669R 0 6 0 0 672-634B 672-724 628-008 672670R 0 6 0 0 672-636C 672-725 628-008 672671R 0 6 0 0 672-634C 672-725 628-008 672672R 0 4 0 0 672-634C 672-725 628-008 672726R 0 6 0 0 672-634A 672-725 628-008 672727R 0 4 0 0 672-634A 672-725 628-008 672728R 0 6 0 0 672-634A 672-725 628-008 672-648R 0 0 0 3 672-636A 672-724 628-008 672-460R 0 0 0 4 672-636A 672-724 628-008 672-474R 0 0 0 6 672-636A 672-724 628-008 672-647R 0 0 0 4 672-636A 672-724 628-008 672-475R 0 0 0 6 672-636A 672-724 628-008

Notes:

1. For other spring replacements, make sure that springs are arranged symemtrically

to ensure proper balance for the actuator.

2. Soak "O" rings in silicone oil prior to assembly.

Assemble and test per Eng. Spec. Y-672-1.

Apply Removable Loctite Threadlocker

#242

(10-12 ft.-lbs)

NOT SHOWN

SPRINGS II

672-645 Total

Actuator Area = 46”

Spring Valve Stroke Rate (inches)

672-6142 672-646 (lbs.)

Number of Springs --- 0.125 0.1875 0.25 0.3125 0.375 0.5626 0.625 0.75 1 1.25 1.5 00 00.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 20 164 0.4457 0.6685 0.8913 1.1141 1.3370 2.0058 2.2283 2.6739 3.5652 4.4565 5.3478 30 246 0.6685 1.0027 1.3370 1.6712 2.0054 3.0087 3.3424 4.0109 5.3478 6.6848 8.0217 40 328 0.8913 1.3370 1.7826 2.2283 2.6739 4.0116 4.4565 5.3478 7.1304 8.9130 10.6957 60 492 1.3370 2.0054 2.6739 3.3424 4.0109 6.0174 6.6848 8.0217 10.6957 13.3696 16.0435 02 104 0.2826 0.4239 0.5652 0.7065 0.8478 1.2720 1.4130 1.6957 2.2609 2.8261 3.3913 22 268 0.7283 1.0924 1.4565 1.8207 2.1848 3.2778 3.6413 4.3696 5.8261 7.2826 8.7391 32 350 0.9511 1.4266 1.9022 2.3777 2.8533 4.2807 4.7554 5.7065 7.6087 9.5109 11.4130 42 432 1.1739 1.7609 2.3478 2.9348 3.5217 5.2835 5.8696 7.0435 9.3913 11.7391 14.0870 62 596 1.6196 2.4293 3.2391 4.0489 4.8587 7.2893 8.0978 9.7174 12.9565 16.1957 19.4348 03 156 0.4239 0.6359 0.8478 1.0598 1.2717 1.9079 2.1196 2.5435 3.3913 4.2391 5.0870 23 320 0.8696 1.3043 1.7391 2.1739 2.6087 3.9137 4.3478 5.2174 6.9565 8.6957 10.4348 33 402 1.0924 1.6386 2.1848 2.7310 3.2772 4.9166 5.4620 6.5543 8.7391 10.9239 13.1087 43 484 1.3152 1.9728 2.6304 3.2880 3.9457 5.9195 6.5761 7.8913 10.5217 13.1522 15.7826 63 648 1.7609 2.6413 3.5217 4.4022 5.2826 7.9253 8.8043 10.5652 14.0870 17.6087 21.1304 04 208 0.5652 0.8478 1.1304 1.4130 1.6957 2.5439 2.8261 3.3913 4.5217 5.6522 6.7826 24 372 1.0109 1.5163 2.0217 2.5272 3.0326 4.5497 5.0543 6.0652 8.0870 10.1087 12.1304 34 454 1.2337 1.8505 2.4674 3.0842 3.7011 5.5526 6.1685 7.4022 9.8696 12.3370 14.8043 44 536 1.4565 2.1848 2.9130 3.6413 4.3696 6.5555 7.2826 8.7391 11.6522 14.5652 17.4783 64 700 1.9022 2.8533 3.8043 4.7554 5.7065 8.5613 9.5109 11.4130 15.2174 19.0217 22.8261 06 312 0.8478 1.2717 1.6957 2.1196 2.5435 3.8159 4.2391 5.0870 6.7826 8.4783 10.1739 26 476 1.2935 1.9402 2.5870 3.2337 3.8804 5.8217 6.4674 7.7609 10.3478 12.9348 15.5217 36 558 1.5163 2.2745 3.0326 3.7908 4.5489 6.8246 7.5815 9.0978 12.1304 15.1630 18.1957 46 640 1.7391 2.6087 3.4783 4.3478 5.2174 7.8275 8.6957 10.4348 13.9130 17.3913 20.8696 66 804 2.1848 3.2772 4.3696 5.4620 6.5543 9.8333 10.9239 13.1087 17.4783 21.8478 26.2174

SPRING RANGE MATRIX

The spring range matrix provides the theoretical spring ranges from a given spring arrangement and valve stem travel. You are encouraged to discuss your application with one of the Powers application engineers.

In general, positioners are required to sequence valves. In some circumstances it may be possible to sequence valves by changing spring ranges and adjusting start points (preload adjustment). Again, please consult with one of our application engineers for assistance.

SPRING OPERATING SPAN (psi)

SPRINGS

CURRENT STD STD SS SS ACTUATORS 672-642 672-615 672-646 672-645 STEM YOKE LOCK NUT

672-457R 0 0 0 4 672-634A 672-725 628-008 672-461R 0 0 0 6 672-634A 672-725 628-008 672-462R 0 0 0 6 672-634A 672-725 628-008 672-463R 0 0 0 6 672-634A 672-725 628-008 672-464R 0 0 3 6 672-636A 672-725 628-008 672-645R 0 0 0 6 672-636A 672-724 628-008 672-458R 0 0 6 6 672-634A 672-725 628-008 672-644R 0 0 6 6 672-634A 672-725 628-008

672-615 TOTAL SPRING VALVE STROKES

STANDARD RATE (lbs.) (inches)

Number of Springs 0.125 0.1875 0.25 0.3125 0.375

000.0000 0.0000 0.0000 0.0000 0.0000 1 245 0.6658 0.9986 1.3315 1.6644 1.9973 2 490 1.3315 1.9973 2.6630 3.3288 3.9946 3 735 1.9973 2.9959 3.9946 4.9932 5.9918 4 980 2.6630 3.9946 5.3261 6.6576 7.9891 5 1225 3.3288 4.9932 6.6576 8.3220 9.9864 6 1470 3.9946 5.9918 7.9891 9.9864 11.9837

Part No. Dia. Spring Rate

672-642 1.406” 82 672-615 2.175” 245 672-645 2.9” 82 672-646 1.459” 52

TABLE 3 VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING STEM VALVE

TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY PART # TRAVEL (in)

WM N/A 1/2 672-022D 672-615 672-648D 672-646 6 672 636 1/8

N/A 1/2 672-022D 672-642 672-648D 672-646 6 672 636 1/8 N/A 3/4 672-022D 672-615 672-648D 672-646 6 672 636 3/16 N/A 3/4 672-022D 672-642 672-648D 672-646 6 672 636 3/16 N/A 1 672-022D 672-615 672-648D 672-646 6 672 636 1/4 N/A 1-1/4 672-022D 672-615 672-648D 672-646 4 672 636 5/16 N/A 1-1/2 672-022D 672-615 672-648D 672-646 4 672 636 5/16 N/A 2 672-022D 672-615 672-647D 672-646 4 672 636 5/16

MI N/A 2-1/2 672-671D 672-642 672-465D 672-646 6 672636B 5/8

N/A 3 672-671D 672-642 672-465D 672-646 6 672636B 3/4 N/A 4 672-671D 672-642 672-465D 672-646 6 672636B 1

*4X Actuators add 6 Springs #672-645.

MODIFICATION DATA TABLES

These tables provide actuator design information with regard to the specific valve type and size. Use this information to determine which springs to use, the number of springs required, and spring kit part numbers. These are the correct preload adjustments when mounting an actuator on a valve or changing stems:

5 psi for NO assemblies 7-10 psi for NC assemblies

Use these pressure and the "Valve Travel" data to properly adjust the stem length of your actuator/valve assembly.

Example:

Change a Single Seat Stainless Trim reduced port 1/2A size valve, with a normally open actuator assembly (593 VE A50 NO)

to a Single Seat Stainless Trim 1/2" size valve with a Normally Closed assembly (593 SS 050 NC).

1. Look up the references to the type of valve you want. In this case, refer to the SS Valve Type, Table 4.

2. You need a new stem, part #672636A. You also need four #672-615 springs.

3. Now install the new parts. Refer to the section on Changing Actuator Action from DA to RA.

4. Also consult the section Changing Springs on a Reverse Acting Actuator. See Figure 3A & B for Typical 4 Spring Installation for symmetrical spring orientation.

TABLE 2

VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING STEM VALVE TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY PART # TRAVEL (in)

SI NO 2-1/2 672-672D 672- 642 672-466D 672-646 6 672-636B 5/8

NO 3 672-672D 672 -642 672-466D 672-646 6 672-636B 3/4 NO 4 672-672D 672 -642 672-466D 672-646 4 672-636B 1 NC 2-1/2 672-024R 672 -642 672-465R 672-646 6 672-636C 5/8 NC 3 672-024R 672 -642 672-465R 672-646 6 673-636C 3/4 NC 4 672-024R 672 -642 672-465R 672-646 6 673-636D 1

*4X Actuators add 6 Springs #672-645.

TABLE 1

VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING STEM VALVE TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY PART # TRAVEL (in)

VE NO 1/2A 672-022D 672-642 672-648D 672-646 6 672-636 1/4

NO 1/2B 672-022D 672-642 672-648D 672-646 6 672-636 1/4 NO 1/2C 672-022D 672-642 672-648D 672-646 6 672-636 1/4 NO 1/2D 672-022D 672-642 672-648D 672-646 6 672-636 1/4 NC 1/2A 672-024R 672-642 672-648R 672-646 6 672-636A 1/4 NC 1/2B 672-024R 672-642 672-648R 672-646 6 672-636A 1/4 NC 1/2C 672-024R 672-642 672-648R 672-646 6 672-636A 1/4 NC 1/2D 672-024R 672-642 672-648R 672-646 6 672-636A 1/4

*4X Actuators add 6 Springs #672-645.

TABLE 5

VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING STEM VALVE TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY PART # TRAVEL (in)

DB NO 1 672-022D 672-615 672-648D 672-646 6 672-636 3/16

NO 1 672-022D 672-642 672-648D 672-646 6 672-636 3/16 NO 1-1/4 672-022D 672-615 672-648D 672-646 6 672-636 1/4 NO 1-1/2 672-022D 672-615 672-648D 672-646 6 672-636 1/4 NO 2 672-022D 672-615 672-648D 672-646 6 672-636 3/8 NC 1 672-024R 672-615 672-648R 672-646 6 672-636A 3/16 NC 1 672-024R 672-642 672-648R 672-646 6 672-636A 3/16 NC 1-1/4 672-024R 672-615 672-648R 672-646 6 672-636A 1/4 NC 1-1/2 672-024R 672-615 672-648R 672-646 6 672-636A 1/4 NC 2 672-024R 672-615 672-466D 672-646 6 672-636A 3/8

DI NO 2-1/2 672-672D 672-615 672-466D 672-646 6 672-636A 3/8

NO 3 672-672D 672-615 672-466D 672-646 6 672-636A 9/16 NO 4 672-672D 672-615 672-466D 672-646 6 672-636A 9/16 NO 5 672-672D 672-642 672-466D 672-646 6 672-636A 3/4 NO 6 672-672D 672-642 672-466D 672-646 6 672-634 1 NC 2-1/2 672-671R 672-615 672-465R 672-646 6 672-636A 3/8 NC 3 672-671R 672-615 672-465R 672-646 6 672-636A 9/16 NC 4 672-671R 672-615 672-465R 672-646 6 672-636A 9/16 NC 5 672-671R 672-642 672-465R 672-646 6 672-636A 3/4 NC 6 672-671R 672-642 672-465R 672-646 6 672-636A 1

*4X Actuators add 6 Springs #672-645.

VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING STEM VALVE TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY PART # TRAVEL (in)

SS NO 1/2 672-607D 672-615 672-647D 672-646 6 672 636 3/8

NO 3/4 672-607D 672-642 672-647D 672-646 6 672 636 3/4 NO 1 672-607D 672-642 672-647D 672-646 6 672 636 3/4

SD NO 1-1/4 672-607D 672-642 672-647D 672-646 6 672 636 1

NO 1-1/2 672-607D 672-642 672-647D 672-646 6 672 636 1 NO 2 672-607D 672-642 672-647D 672-646 6 672 636 1

SP NC 1/2 672-607R 672-642 672-647R 672-646 6 672636A 3/8

NC 3/4 672607R 672 642 672-647R 672-646 6 672636A 3/4 NC 1 672607R 672 642 672-647R 672-646 6 672636A 3/4 NC 1-1/4 672605R 672 642 672-647R 672-646 6 672636A 1 NC 1-1/2 672605R 672 642 672-647R 672-646 6 672636A 1 NC 2 672605R 672 642 672-647R 672-646 6 672636A 1

*4X Actuators add 6 Springs #672-645.

TABLE 4

VALV E ASSEMBLY VALVE 46 ACTUATOR 46 SPRING 4C ACTUATOR 4C SPRING SPRING VALVE TYPE ACTION SIZE PART # PART# PART # PART# QUANTITY TRAVEL (in)

SB NO 1/2 672-727D 672-642 672-468D 672-646 4 9/16

NO 3/4 672-727D 672-642 672-468D 672-646 4 9/16 NO 1 672-727D 672-642 672-468D 672-646 4 3/4 NO 1 1/4 672-727D 672-642 672-468D 672-646 4 3/4 NO 1 1/2 672-727D 672-642 672-468D 672-646 4 3/4 NO 2 672-727D 672-642 672-468D 672-646 4 3/4 NC 1/2 672-726R 672-642 672-469R 672-646 6 9/16 NC 3/4 672-726R 672-642 672-469R 672-646 6 9/16 NC 1 672-726R 672-642 672-469R 672-646 6 3/4 NC 1 1/4 672-726R 672-642 672-469R 672-646 6 3/4 NC 1 1/2 672-726R 672-642 672-469R 672-646 6 3/4 NC 2 672-726R 672-642 672-469R 672-646 6 3/4

*4X Actuators add 6 Springs #672-645.

TABLE 6

USA ofﬁce: Phone: 800.669.5430 • Fax: 847.824.0627

Canadian ofﬁce: Phone: 888.208.8927 • Fax: 888.882.1979

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TI-593-672 0252 EDP # 1916068 Printed in U.S.A.

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