Emerson Process Management FISHER 657 Manuel d'utilisateur

www.Fisher.comD100306X012Type 657 Diaphragm ActuatorSizes 30-70 and 87ContentsIntroduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 2007108. Tighten the remaining hex nuts in a clockwise,criss-cross pattern to 13 NSm (

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200711figure 10) with anti-seize lubricant (key 244). Placethe thrust bearing in the pu

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 2007122. Remove the retaining ring (key 154) and drive outthe lever pivot pin (key 153

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 2007133. Remove the cap screws and casing screws andnuts (keys 22 and 23), lift off th

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20071411. Pack the needle bearing and race (keys 37 and 38) with lithium grease (key 2

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200715Disassembly for Casing-Mounted TravelStop1. Bypass the control valve. Reduce the

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200716Figure 6. Type 657 Actuator Sizes 30 through 60 APPLY LUB40A8765–C/DOCFigure 7

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200717Figure 8. Type 657 Size 87 Actuator APPLY LUB50A8767–C / ILParts KitsKey Descr

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200718Key Description Part NumberSizes 46 & 60 18B2713X112Sizes 70 & 87 18B2713

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200719Figure 9. Top-Mounted Handwheel Assembly for Size 30through 60 Actuators APPLY

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20072Table 1. SpecificationsSPECIFICATION(1)ACTUATOR SIZESPECIFICATION(1)30 34 40 45 46

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200720Figure 11. Side-Mounted Handwheel Assembly for Size 34 and 40 Actuators APPLY

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200721Figure 13. Type 657 Size 70 and 87 Actuators with Side-Mounted Handwheel APPLY

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200722Figure 14. Casing-Mounted Adjustable Up Travel Stop forSizes 30 through 60 Actuat

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200723Figure 16. Casing-Mounted Adjustable Down Travel Stop for Size 30 and 40 Actuator

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200724Key 6 Actuator SpringACTUATORSIZEDIAPHRAGMPRESSURERANGETRAVEL, mm (INCHES)SIZEBar

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20073Figure 2. Schematic of Type 657 and 657-4 ActuatorsSPRING LIFTSSTEM UPAIR PUSHESST

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20074Figure 4. Bench Set AdjustmentSPRING ADJUSTERLOWER BENCH SETLOADING PRESSUREUPPER

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20075valve because the disk will not go through theactuator yoke opening).4. Do not co

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20076nameplate. Apply loading pressure to thediaphragm.CAUTIONStroke the actuator a few

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20077Figure 5. Typical Valve Response to DeadbandUPPER BENCH SETPRESSURELOWERBENCH SETP

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 200784. Calculate the percent of deadband by: Dead

657 Actuator (30-70 and 87)Instruction ManualForm 1900February 20079Actuator Disassembly1. Bypass the control valve. Reduce the loadingpressure to at