Data Sheet

ManualsBrandsEmerson ManualsData Input Devices685SE

www.Fisher.com

Fisherr 685SE and 685SR Piston Actuators

The685SEand685SRaremediumtolarge

spring-return, double-acting piston actuators that

provide accurate, high thrust output for short to long

travel applications. These actuators are designed for

use with a variety of medium to large Fisher

slidingstem control valves including the easye™, FB,

TBX,CVX, HP, EH, and 461.

These actuators feature an internal bias spring that

forces the actuator piston rod to extend (685SE) or

retract (685SR) upon a loss of supply pressure, thereby

ensuring a fail-closed or fail-open mode of operation.

This effectively eliminates the need for a trip valve and

volume tank in most constructions.

Several configurations are available to cover a wide

range of application requirements. Typical travels

range from 25 to 610 mm (1 to 24 inches) and cylinder

diameters range from 254 to 711 mm (10 to 28

inches).

The 685SE and 685SR can be used with the FIELDVUE™

DVC6200 digital valve controller for throttling

applications, or with switching valves for onoff

control. This actuator can also be fitted with volume

boosters for fast stroking requirements.

Features

 High Thrust Capability — Maximum thrusts of up to

354 kN (79,000 lbf) can be produced, when supply

pressure is available.

 Broad Application Coverage — Standard

constructions offer travels of up to 610 mm (24

inches) and cylinder diameters of up to 711 mm

(28 inches). Even larger constructions are available

upon request.

 Low Friction — Low friction piston seals and either

chrome plated or fluoropolymer coated cylinder

bores reduce sliding friction and wear.

X0993

 Double Acting Construction — Pressure on both

sides of the piston results in stiff, precise

positioning.

 Wide Temperature Range — Standard constructions

offer a temperature range of -40 to 93_C(-40to

200_F), however higher or lower temperatures are

possible. Special constructions can operate as low

as -54_C(65_F)andashighas204_C(400_F).

 Mechanical Fail Mode — Depending on construction,

an internal bias spring will force the piston rod to

retract or extend upon a loss of supply pressure.

 Manual Override — An optional side-mounted

handwheel or hydraulic hand-pump is capable of

extending or retracting the actuator manually and

can be engaged at any position from full open to full

closed.

685SE and 685SR Actuators

D103791X012

Product Bulletin

61.2:685SE/685SR

September 2014

Summary of content (12 pages)

PAGE 1
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Fisherr 685SE and 685SR Piston Actuators The 685SE and 685SR are medium to large spring-return, double-acting piston actuators that provide accurate, high thrust output for short to long travel applications. These actuators are designed for use with a variety of medium to large Fisher slidingstem control valves including the easye™, FB, TBX,CVX, HP, EH, and 461.
PAGE 2
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 1. Specifications Operating Pressure(1) Construction Materials Minimum: 2.7 bar (40psig) PART MATERIAL Maximum Allowable: 10.
PAGE 3
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Figure 1. Fisher 685SE Piston Actuator SPRING CARTRIDGE PRESSURE CONNECTIONS (TOP AND BOTTOM) TIE RODS SPRING CYLINDER PISTON MOUNTING BOSSES PISTON WEAR RING PISTON QUAD SEAL BEARING ASSEMBLY BEARING RETAINING RING PISTON ROD VALVE STEM CONNECTOR YOKE X0992 Principle of Operation 685SE and 685SR piston actuators utilize a piston that moves inside of a cylinder to generate thrust.
PAGE 4
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Instrument Selection currenttopneumatic instruments. In addition to the traditional function of converting a current signal to a pressure signal, DVC6200 digital valve controllers, using HARTr or FOUNDATION™ fieldbus communications protocol, give easy access to information critical to process operation.
PAGE 5
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 3. Supply Connections SUPPLY CONNECTION ACTUATOR SIZE Size, NPT Quantity (Top/Bottom) 1/1 10 3/8 12 3/4 14 to 28 3/4 (standard), 1, or 1-1/4 2/2 (standard) 1/1 2/2 (standard) 1/1 2/2 (standard for 3/4 NPT only) Table 4. Dimensions A, G, H, and L ACTUATOR Type 685SE 685SR G A H L Size mm Inch mm Inch mm Inch mm Inch 10 318 12.50 338 13.31 235 9.25 394 15.50 12 381 15.
PAGE 6
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 6. Dimensions B and C ACTUATOR SIZE 10, 12 14 16 6 MAXIMUM VALVE TRAVEL MAXIMUM B C (WITHOUT MANUAL OVERRIDE) 3-9/16 Inch Yoke Boss 5/5H Inch Yoke Boss C (WITH MANUAL OVERRIDE) 7 Inch Yoke Boss 3-9/16 Inch Yoke Boss 5/5H Inch Yoke Boss 7 Inch Yoke Boss mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch 25 1 457 18.00 808 31.82 878 34.57 910 35.82 992 39.
PAGE 7
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 6. Dimensions B and C (continued) ACTUATOR SIZE 18 20 22 MAXIMUM VALVE TRAVEL MAXIMUM B C (WITHOUT MANUAL OVERRIDE) 5/5H Inch Yoke Boss C (WITH MANUAL OVERRIDE) 7 Inch Yoke Boss 5/5H Inch Yoke Boss 7 Inch Yoke Boss mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch 25 1 521 20.50 968 38.13 1000 39.38 1129 44.44 1160 45.69 51 2 578 22.75 1026 40.38 1057 41.63 1186 46.
PAGE 8
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 6. Dimensions B and C (continued) ACTUATOR SIZE 24 26, 28 MAXIMUM VALVE TRAVEL MAXIMUM B C (WITH MANUAL OVERRIDE) 7 Inch Yoke Boss 5/5H Inch Yoke Boss 7 Inch Yoke Boss mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch 25 1 572 22.50 1092 43.01 1124 44.26 1254 49.38 1286 50.63 51 2 629 24.75 1149 45.26 1181 46.51 1311 51.63 1343 52.88 76 3 679 26.75 1200 47.
PAGE 9
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Figure 2.
PAGE 10
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Figure 3.
PAGE 11
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 7. Actuator Removal Clearance (AR) AR (WITHOUT MANUAL OVERRIDE) MAXIMUM VALVE TRAVEL 3-9/16 Inch Yoke Boss 5/5H Inch Yoke Boss AR (WITH MANUAL OVERRIDE) 7 Inch Yoke Boss 3-9/16 Inch Yoke Boss 5/5H Inch Yoke Boss 7 Inch Yoke Boss mm in mm in mm in mm in mm in mm in mm in 102 4.0 267 10.50 343 13.50 368 14.50 343 13.50 343 13.50 368 14.50 203 8.0 318 12.50 318 12.
PAGE 12
Product Bulletin 685SE and 685SR Actuators 61.2:685SE/685SR September 2014 D103791X012 Table 10. Approximate Weights for Constructions with Handwheels ACTUATOR TYPE 685SE 685SR MAX VALVE TRAVEL APPROXIMATE WEIGHT FOR ACTUATOR SIZE, kg (lbs) mm (inches) 10 12 14 16 18 20 22 24 26 25 (1.00) 167 (369) 212 (468) 336 (742) 381 (839) 432 (953) 603 (1330) 675 (1489) 853 (1881) 941 (2075) 51 (2.