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Instruction Manual
Form 1909
February 1999
Type 657 Diaphragm Actuators
Sizes 80 and 100
Contents
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Type 657 Sizes 80 & 100
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W0366-1 / IL
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Figure 1. Sectional view of Type 657 Size 100 Actuator
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AF3833-A
A0792-2/IL
Figure 2. Schematic Representation of Type 657 Actuator
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AIR PUSHES
STEM DOWN
SPRING
LIFTS
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Table of Contents
Related Manuals for Fisher 657 Sizes 80
Summary of Contents for Fisher 657 Sizes 80
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Page 1: Table Of Contents
Instruction Manual Form 1909 Type 657 Sizes 80 & 100 February 1999 Type 657 Diaphragm Actuators Sizes 80 and 100 Contents Introduction ...... -
Page 2: Introduction
3. 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 maximum allowable valve stem force. (If you have any questions on allowable valve stem force, contact your Fisher Controls sales office or sales representative.) 4. -
Page 3: Actuator Mounting
Type 657 Sizes 80 & 100 When an actuator and valve body are shipped togeth- er, the actuator is normally mounted on the valve. Fol - low the valve body instructions when installing the control valve in the pipeline. If the actuator is shipped... -
Page 4: Spring
Type 657 Sizes 80 & 100 1. Back the stem locknuts away from the stem con- nector, and slightly loosen the stem connector cap screws. CAUTION Do not use wrenches or other tools di- rectly on the valve stem. Damage to the... -
Page 5: Maintenance
Because of the care upper diaphragm casing (key 1) away Fisher Controls takes in meeting all manufacturing re- from the actuator, relieve spring com- quirements (such as heat treating and dimensional... -
Page 6: Size 80 Assembly
Type 657 Sizes 80 & 100 2. Remove cover band (key 60). Insert a rod of screw, and thrust bearing (keys 36, 12, and 35). Pack approximately 1/2-inch (12.7 mm) diameter into a hole bearing with Lubriplate MAG-1 lubricant (key 241) or in the adjusting screw (key 12), and rotate the adjust- equivalent. -
Page 7: Size 100 Disassembly
Type 657 Sizes 80 & 100 CAUTION WARNING To avoid personal injury from the precom- Over-tightening the diaphragm casing pressed spring force thrusting the upper cap screws and nuts can damage the diaphragm casing (key 1) away from the diaphragm. Do not exceed 50 lbfSft (68 actuator, relieve spring compression (step NSm) torque. -
Page 8: Size 100 Assembly
Type 657 Sizes 80 & 100 Size 100 Assembly Note When you replace actuator diaphragms in the field, take care to ensure the dia- Note phragm casing bolts are tightened to the proper load to prevent leakage, but Units using a group 2 spring require not crush the material. -
Page 9: Size 80 Side-Mounted Handwheel: Disassembly
Type 657 Sizes 80 & 100 can be mounted in either of two positions so that, re- and slide the shaft into the gear case so that the end gardless of valve plug action, counterclockwise rota- of the shaft fits snugly in the back worm retainer. -
Page 10: Size 80 Top-Mounted Handwheel
Type 657 Sizes 80 & 100 decrease damping action. The adjusting screw on the relieved. Rotate handwheel to be sure it is not com- right (the lower of the two adjusting screws in section pressing actuator spring. B-B of figure 7) regulates downward damping action, 3. -
Page 11: Size 100 Top-Mounted Handwheel: Assembly
Each actuator has a serial number stamped on the nameplate. Always refer to this number when corre- 6. Remove front and back worm retainers (keys 48 sponding with your Fisher Controls sales office or and 49). sales representative regarding replacement parts or 7. - Page 12 Type 657 Sizes 80 & 100 Description Part Number Description Part Number Lower Diaphragm Casing, Yoke, & Yoke Tie Rod Ass’y. Size 80 (5 yoke) Size 100 w/group 1 springs Cast Iron 5H yoke boss 40A2631X012 w/o side-mtd handwheel Std 3K407919042 7 in.
- Page 13 Type 657 Sizes 80 & 100 APPLY LUB 40A8771-B / DOC Figure 5. Size 80 Type 657 Actuator Description Part Number Description Part Number Travel Indicator, stainless steel Actuator Tie Rod, steel Size 80 1H736438992 Size 100 w/group 2 springs (4 req’d)
- Page 14 Type 657 Sizes 80 & 100 APPLY LUB 50A2621-F / DOC Figure 6. Size 100 Type 657 Actuator Description Part Number Description Part Number Upper Sleeve, steel (Cont.) Adjusting Flange (cont’d) 3 in. (76 mm) travel 1H734126022 w/o side-mtd handwheel...
- Page 15 Type 657 Sizes 80 & 100 Key 6 Size 80 Actuator Spring, steel COMPRESSION MAXIMUM PART COLOR RATE LOAD SIZE SIZE NUMBER NUMBER CODE CODE Lb/in N/mm 58.7 2480 11,031 1J518227082 White 1000 175.1 5630 25,042 1H747727082 1650 288.9 7900...
- Page 16 Type 657 Sizes 80 & 100 SECTION B B VIEW A VIEW A SECTION C C APPLY LUB 50A8774-C / DOC Figure 7. Size 80 Type 657 Actuator with Side-Mounted Handwheel and Hydraulic Snubber Description Part Number Description Part Number...
- Page 17 Type 657 Sizes 80 & 100 Description Part Number Size 80 Top-Mtd Handwheel Handwheel, cast iron 2A193719042 Nut, pl steel 11B7131X012 Stem, pl steel 10A7297X012 Cap Screw, pl steel (8 req’d) 1A508324052 Handwheel Body, cast iron 2A145319012 Thrust Bearing 1A354128992...
- Page 18 50A2622-F / DOC Figure 9. Top-Mounted Handwheel for Size 100 Actuator Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners.
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