Data Sheet

ManualsBrandsEmerson ManualsPneumatic ActuatorsEmerson Fisher 656

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Fisherr 656 Diaphragm Actuator

The Fisher 656 actuator is a bracket-mounted,

direct-acting, diaphragm actuator for either throttling

or on-off service. Principal applications include

operation of butterfly valves and built-in turbine

valves, louvers, dampers, and other similar equipment.

Features

 Mounting Versatility–Four tapped holes in the

actuator base permit either bracket or plate

mounting.

 Long Actuator Travel–Deep casings provide up to

105 mm (4.125 inches) of maximum travel with a

size 60 actuator.

 Application Versatility–Wide spring selection is

available for nearly any control application. Spring

selection procedures are quick and accurate.

 Severe Service Capability–Rugged yoke and casings

provide stability and corrosion resistant protection.

Installation

The actuator may be installed in any position.

Dimensions are shown in figure 1.

W1996-2

Fisher 656 Actuator

TRAVEL STOP

ADJUSTING SCREW

SPRING SEAT

BEARING

BEARING SEAT

YOKE

TYPICAL CONSTRUCTION

W0454-1

656 Actuator

D100086X012

Product Bulletin

61.1:656

February 2013

Summary of content (4 pages)

PAGE 1
Product Bulletin 656 Actuator 61.1:656 February 2013 D100086X012 Fisherr 656 Diaphragm Actuator The Fisher 656 actuator is a bracket-mounted, direct-acting, diaphragm actuator for either throttling or on-off service. Principal applications include operation of butterfly valves and built-in turbine valves, louvers, dampers, and other similar equipment. Features  Mounting Versatility–Four tapped holes in the actuator base permit either bracket or plate mounting.
PAGE 2
Product Bulletin 656 Actuator 61.1:656 February 2013 D100086X012 Specifications Maximum Recommended Casing Operating Pressure(1) 2.4 bar (35 psig) Maximum Allowable Casing Pressure(2)(4) 30 Maximum Casing Pressure for Actuator Sizing(2a), Bar (Psig) 8.6 (125) 1.0 (15) 9.7 (140) 40 4.5 (65) 0.69 (10) 5.2 (75) 60 2.8 (40) 0.69 (10) 3.4 (50) Actuator Size Maximum Excess Diaphragm Pressure(1a), Bar (Psig) Maximum Diaphragm Casing Pressure(2a,3a), Bar (Psig) 1a.
PAGE 3
Product Bulletin 656 Actuator 61.1:656 February 2013 D100086X012 Table 1. Stem Force Output and Other Actuator Data TYPICAL SPRINGS(1) NET STEM FORCE(2) EFFECTIVE DIAPHRAGM AREA Stem Fully Extended(4), with Diaphragm Loading as Shown Maximum Range Part Number Color Code Bar --- --- Newtons Newtons 0.17 to 0.66 0.21 to 0.86 0.29 to 1.2 0.26 to 1.3 0.27 to 1.6 0.21 to 1.
PAGE 4
Product Bulletin 656 Actuator 61.1:656 February 2013 D100086X012 Table 3. Dimensions DIMENSION E ACTUATOR SIZE A C Without Handwheel With Handwheel H 30 67 289 314 490 40 79 333 454 60 79 473 692 Y (4 Holes) J S (Stem Thread) X Bolt Circle Diameter Thread 54 171 1/2-20 19 73 3/8-16 UNC 723 57 222 3/4-16 19 73 3/8-16 UNC 1014 64 222 3/4-16 32 99 1/2-13 UNC 0.75 2.88 0.75 2.88 1.25 3.88 mm Inches 30 2.62 11.38 12.38 19.32 2.12 6.75 30 3.12 13.