Emerson 657 - Manuals - manualsarea.com

Page 2 - Instruction Manual; Description; Note; Specifications

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 2 Table 1. Specifications SPECIFICATION (1) ACTUATOR SIZE SPECIFICATION (1) 30 34 40 45 46 50 60 70 (1) 87 (1) Nominal Effective Area cm 2 297 445 445 677 1006 677 1006 1419 1419 Nominal Effective Area Inch 2 46 69 69 105 156 105...

Page 3 - Installation; WARNING; If the actuator and

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 3 Figure 2. Schematic of Type 657 and 657-4 Actuators SPRING LIFTSSTEM UP AIR PUSHESSTEM DOWN STEM AF3833-AA0792-2/IL Installation Key number locations are shown in figures 6, 7, and 8, unless otherwise indicated. Also, refer tofi...

Page 4 - If a positioner is installed, or is to; Mounting the Actuator on the Valve; Lift or hoist the actuator onto the valve bonnet:; For size 87 actuators,; insert the cap screws; For all other size actuators,; screw the yoke

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 4 Figure 4. Bench Set Adjustment SPRING ADJUSTER LOWER BENCH SETLOADING PRESSURE UPPER BENCH SETPRESSURE MARK VALVESTEM RATED VALVETRAVEL MEASURE MARK VALVESTEM HERE UPPER BENCH SETLOADING PRESSURE ACTUATORSTEM NOTES: THE LOWER P...

Page 5 - not; connect the actuator stem to the valve; Discussion of Bench Set; Refer to table 1 for the effective diaphragm area.; Spring Verification; top

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 5 valve because the disk will not go through theactuator yoke opening). 4. Do not connect the actuator stem to the valve stem at this time. Whenever the actuator is installedon the valve, it is recommended to perform theBench Set ...

Page 6 - first; detected at the; CAUTION

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 6 nameplate. Apply loading pressure to thediaphragm. CAUTION Stroke the actuator a few times toensure that the pressure gauge isworking correctly, and that theactuator is functioning properly. Toprevent product damage, it isimpor...

Page 7 - Deadband Measurement

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 7 Figure 5. Typical Valve Response to Deadband UPPER BENCH SETPRESSURE LOWERBENCH SETPRESSURE 9 3 0 CLOSINGVALVE 15 1.0 0.6 0.2 OPENINGVALVE OPEN CLOSED MID RANGE VALVE TRAVEL DIAPHRAGM PRESSURE, PSIG DIAPHRAGM PRESSURE, BAR RANGE...

Page 8 - Calculate the percent of deadband by:; Loading Connection; Maintenance; even when the valve has; Actuator Maintenance

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 8 4. Calculate the percent of deadband by: Deadband, psi Deadband = —————————————— = nn% Bench Set Span, psi Loading Connection The loading pressure connections are made at thefactory if the valve, actuator, and positioner come a...

Page 9 - Actuator Disassembly; Actuator Assembly

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 9 Actuator Disassembly 1. Bypass the control valve. Reduce the loadingpressure to atmospheric, and remove the tubing orpiping from the upper diaphragm casing (key 1). WARNING To avoid personal injury from theprecompressed spring f...

Page 10 - Top-Mounted Handwheel Assembly; Assembly for Top-Mounted Handwheel; For a handwheel assembly used on sizes 30

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 10 8. Tighten the remaining hex nuts in a clockwise,criss-cross pattern to 13 N S m (10 lbf S ft). 9. Repeat this procedure by tightening four hexnuts, diametrically opposed and 90 degrees apart, toa torque of 27 N S m (20 lbf S ...

Page 12 - lbf

657 Actuator (30-70 and 87) Instruction Manual Form 1900 February 2007 12 2. Remove the retaining ring (key 154) and drive outthe lever pivot pin (key 153). 3. Two screws (key 156) hold the right- andleft-hand levers (key 146) together. Remove thescrew from the top of the levers so that the leverswi...

Page 15 - Casing-Mounted Adjustable Up Travel Stops; drive out the groove; Casing-Mounted Adjustable Down Travel Stops; Parts Ordering; Use only genuine Fisher

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 15 Disassembly for Casing-Mounted TravelStop 1. Bypass the control valve. Reduce the loadingpressure to atmospheric, and remove the tubing orpiping from the connection in the body (key 142). WARNING To avoid personal injury from t...

Page 17 - Parts Kits; Kits for Side-Mounted Handwheels; Parts List

657 Actuator (30-70 and 87) Instruction Manual Form 1900February 2007 17 Figure 8. Type 657 Size 87 Actuator APPLY LUB 50A8767–C / IL Parts Kits Key Description Part Number Kits for Side-Mounted Handwheels Retrofit kit includes parts to add a side-mounted handwheel. Size 34 push down to close 30A877...