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Instruction Manual
Form 1900
February 2007
657 Actuator (30-70 and 87)
Type 657 Diaphragm Actuator
Sizes 30-70 and 87
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mo
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) Table 1. Specifications ACTUATOR SIZE (1) (1) SPECIFICATION SPECIFICATION (1) (1) 30 34 40 45 46 50 60 70 87 2 cm 297 445 445 677 1006 677 1006 1419 1419 Nominal Nominal Effective Area Effective Area 2 Inch 46 69 69 105 156 105 156 220 220 mm 54 54 71 71 71 90 90 90 127 Yoke Yoke Boss Diameters Boss Diameters Inches 2-1/8 2-1/8 2-13/16 2-13/16 2-13/16 3-9/16 3-9/16 3-9/16 5 mm 9.5 9.5 12.7 12.7 12.7 19.1 19.1 19.1 25.4 Accept
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) AIR PUSHES NPT FEMALE STEM DOWN CONNECTION DIAPHRAGM CASING DIAPHRAGM AND SPRING LIFTS STEM SHOWN IN STEM UP UP POSITION DIAPHRAGM PLATE LOWER DIAPHRAGM CASING STEM ACTUATOR SPRING AF3833-A ACTUATOR STEM A0792-2/IL SPRING SEAT Figure 2. Schematic of Type 657 and 657-4 Actuators SPRING ADJUSTOR STEM CONNECTOR YOKE Installation TRAVEL INDICATOR DISK Key number locations are shown in figures 6, 7, INDICATOR SCALE and 8, unless o
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) SPRING ADJUSTER RATED VALVE TRAVEL MEASURE LOWER BENCH SET LOADING PRESSURE 1 ACTUATOR STEM UPPER BENCH SET PRESSURE MARK 3 4 MARK VALVE 2 UPPER BENCH SET VALVE STEM HERE 3 LOADING PRESSURE STEM NOTES: 1 THE LOWER PSIG LOADING PRESSURE (MARKED ON NAMEPLATE) WHERE THE FIRST MOVEMENT OF ACTUATOR STEM IS DETECTED. 2 THE UPPER PSIG LOADING PRESSURE EXTEND ACTUATOR STEM. 3 MARK THIS POINT WITH TAPE OR A MARKER. MEASURE DISTANCE OF
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) valve because the disk will not go through the 3. Increase the actuator diaphragm pressure until actuator yoke opening). the actuator is at a travel position greater than its mid-travel position. 4. Do not connect the actuator stem to the valve 4. Decrease the actuator diaphragm pressure and stem at this time. Whenever the actuator is installed read the diaphragm pressure as the actuator on the valve, it is recommended to
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) nameplate. Apply loading pressure to the selection for your application. Or, contact your diaphragm. Emerson Process Management sales office for assistance. After replacing the spring, repeat the steps above. CAUTION Installing the Stem Connector Stroke the actuator a few times to Assembly ensure that the pressure gauge is When installing the stem connector assembly working correctly, and that the (key 26), the actuator and
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) CLOSING OPENING VALVE VALVE UPPER UPPER 1.0 1.0 BENCH SET 15 BENCH SET 15 PRESSURE PRESSURE 0.6 0.6 9 9 RANGE OF RANGE OF DEADBAND 1 DEADBAND 1 LOWER LOWER OPENING CLOSING BENCH SET 0.2 BENCH SET 0.2 3 3 VALVE VALVE PRESSURE PRESSURE 0 0 CLOSED CLOSED OPEN MID RANGE MID RANGE OPEN VALVE TRAVEL VALVE TRAVEL
NOTE: 1 DEADBAND IS CAUSED BY FRICTION. A6763-2 / IL Figure 5. Typical Valve Re
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 4. Calculate the percent of deadband by: WARNING Deadband, psi Deadband = —————————————— = nn% Avoid personal injury or property Bench Set Span, psi damage from sudden release of process pressure or bursting of parts. Before performing any maintenance operations: Loading Connection Always wear protective gloves, The loading pressure connections are made
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) installing and evenly tightening the cap screws Actuator Disassembly (key 8). 1. Bypass the control valve. Reduce the loading pressure to atmospheric, and remove the tubing or 3. Set the actuator spring (key 6) squarely onto the piping from the upper diaphragm casing (key 1). spring seat (key 11). 4. If the diaphragm plate and actuator stem (keys 4 and 10) are separate, fasten them together using the WARNING cap screw and
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 8. Tighten the remaining hex nuts in a clockwise, WARNING criss-cross pattern to 13 Nm (10 lbfft). To avoid personal injury from the 9. Repeat this procedure by tightening four hex precompressed spring force thrusting nuts, diametrically opposed and 90 degrees apart, to the upper diaphragm casing (key 1) a torque of 27 Nm (20 lbfft). away from the actuator, thread the spring adjuster (key 12) out of the yoke until all s
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) Note figure 10) with anti-seize lubricant (key 244). Place the thrust bearing in the pusher plate (key 135, Do not use lubricant on these bolts figure 10), slide the two parts onto the handwheel and nuts. Fasteners must be clean and stem (key 133). Coat the retaining screw threads dry. with thread locking sealant (key 242). Insert and tighten the retaining screw (key 174, figure 10). 8. Insert the cap screws (key 22), and ti
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 2. Remove the retaining ring (key 154) and drive out nut (key 54) onto the end of the handwheel screw the lever pivot pin (key 153). (key 145). Tighten the stop nut. 5. Position the pointer mounting bolt (key 159, not 3. Two screws (key 156) hold the right- and shown) and pointer (key 160) as shown in figure 11 left-hand levers (key 146) together. Remove the or 12. Insert and tighten the screw (key 161). screw from the top
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 3. Remove the cap screws and casing screws and 2. Thread the back retainer and ball bearing nuts (keys 22 and 23), lift off the upper diaphragm (keys 49 and 50) into the yoke (key 9). Align the slot casing (key 1), and remove the diaphragm (key 2). in the bearing retainer with the set screw hole in the yoke, insert the set screw (key 41), and tighten it. 4. Remove the cap screw (key 3) and the washer (key 25), then take o
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 11. Pack the needle bearing and race (keys 37 19. Tighten the remaining hex nuts in a clockwise, and 38) with lithium grease (key 241), and slide the criss-cross pattern to 27 Nm (20 lbfft). bearing onto the spring adjuster (key 12). 20. After the last hex nut is tightened to 27 Nm (20 12. Put the spring seat and actuator spring (keys 11 lbfft), all of the hex nuts should be tightened again and 6) into the yoke (key 9
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) 5. Loosen the stop nut (key 54), then unscrew the Disassembly for Casing-Mounted Travel travel stop stem (key 133) out of the actuator stem. Stop The lower diaphragm plate can now be removed. 1. Bypass the control valve. Reduce the loading pressure to atmospheric, and remove the tubing or piping from the connection in the body (key 142). Assembly for Casing-Mounted Travel Stop 1. Reassemble the up or down travel stop in th
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) APPLY LUB 40A8765–C/DOC Figure 6. Type 657 Actuator Sizes 30 through 60 APPLY LUB 50A8768–C/DOC Figure 7. Type 657 Size 70 Actuator 16
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) APPLY LUB 50A8767–C / IL Figure 8. Type 657 Size 87 Actuator Parts Kits Parts List Key Description Part Number Note Part numbers are shown for recommended spares Kits for Side-Mounted Handwheels only. For part numbers not shown, contact your Retrofit kit includes parts to add a side-mounted handwheel. Emerson Process Management sales office. Size 34 push down to close 30A8778X0A2 Size 34 push down to open 30A8778X0B2 Size
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) Key Description Part Number Top Mounted Handwheel Sizes 46 & 60 18B2713X112 (figure 9 or 10) Sizes 70 & 87 18B2713X122 With down travel stop (style 2) Key Description Part Number Sizes 70 & 87 2N1309X0012 51 Handwheel Fluorocarbon/Aramid 54 Stop Nut Size 30 1F354202402 133 Handwheel Stem, brass Sizes 34 & 40 1F444302402 134 Washer Sizes 45 & 50 1F354102402 135 Pusher Plate Sizes 46 & 60 1F4444X0022 137 Casing-Mounted Travel
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) Key Description Part Number 143 U-Bolt 144 Hex Nut, pl steel 145 Handwheel Screw 146 Lever & Pin Ass’y 147 Hex Jam Nut 148 Dowel Pin 149 Washer 150 Lockwasher 151 Bushing 152 Ball Bearing 153 Lever Pivot Pin 154 Retaining Ring 155 Lever Spacer 156 Screw 157 Lockwasher 158 Hex Nut 159 Pointer Mounting Bolt APPLY LUB/SEALANT 160 Pointer NOTES: 161 Screw THE TOP MOUNTED HANDWHEEL IS NOT DESIGNED FOR USE UNDER HEAVY LOAD OR F
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Instruction Manual Form 1900 February 2007 657 Actuator (30-70 and 87) APPLY LUBRICANT 30A8778-D / IL Figure 11. Side-Mounted Handwheel Assembly for Size 34 and 40 Actuators APPLY LUBRICANT 40A8779-D / IL Figure 12. Side-Mounted Handwheel Assembly for Size 45 and 60 Actuators 20
