Specifications - Fisher 685SE Instructions Manual

685SE/685SR Piston Actuator
June 2017
Table 1. Specifications
(1)
Operating Pressure
Minimum: 2.7 bar (40psig)
Maximum Allowable: 10.3 bar (150 psig)
Consult your Emerson sales office
Partner for supply pressures under 2.7 bar (40 psi)
(2)
Travel
25 mm (1 inch) through 610 mm (24 inch).
See table 2
Thrust Capabilities
Designed to meet the application requirements
Piston Diameter and Area
Available in 51 mm (2 inch) increments between
254 mm (10 inch) and 711 mm (28 inch). See table 2
Operative Temperature Limits
Standard: -40 to 93_C (-40 to 200_F)
Low Temperature: -54 to 93_C (-65 to 200_F)
High Temperature: -32 to 204_C (-25 to 400_F)
Pressure Connections
See table 3
Yoke Boss and Valve Stem Diameter
J 90.5 mm (3­9/16 inch) yoke boss with 19.1 mm (3/4
J 127 mm (5 inch) yoke boss with 25.4 mm
inch) stem
J 127 mm (5 inch) yoke boss with 31.8
(1 inch) stem
J 127 mm (5H inch) yoke boss
mm (1­1/4 inch) stem
with 32 mm (1­1/4 inch) stem
boss with 51 mm (2 inch) stem
Instrument Mounting
Mounting kits are available for use with FIELDVUE™
DVC6200 Series digital valve controllers
Manual Override (optional)
Size 10 to 26: Handwheel
Size 28: Hydraulic Hand-pump
1. The pressure/temperature limits in this instruction manual and any other applicable standard or code should not be exceeded.
2. Contact your Emerson sales office for larger travels or cylinder diameters. The Fisher 657, 667, and 585C family of actuators can be used for smaller travels or cylinder diameters.
3. Contact your Emerson sales office for applications requiring low or high temperature requirements.
4. Contact your Emerson sales office for applications requiring a manual override on a size 28 actuator.
5. Refer to the product nameplates to determine which certifications each actuator construction possesses.

Specifications

Specifications for the 685SE and 685SR piston actuators are shown in table 1. Refer to the nameplate affixed to the
actuator yoke for specifications specific to individual constructions.
2
or Local Business
(2)
(3)
(3)
J 178 mm (7 inch) yoke
(4)
Construction Materials
PART
Yoke
Piston
254 to 559 mm (10 to 22 inch) cylinder:
1026 DOM (steel) with chrome­plated bore
Cylinder 610 to 711 mm (24 to 28 inch) cylinder:
Upper/Lower Heads
Outer Spring Cartridge
Tie Bolt
Piston Rod
Stem Connector
Weights
See tables 4 and 5
Lifting Point Load Ratings
See table 6
Optional Certifications
J Pressure Equipment Directive (PED) 2014/68/EU
J Complies with the requirements of ATEX Group II
Category 2 Gas and Dust
J Customs Union Technical Regulations (CU TR)
010/2011 and 012/2011
II Gb c T* X/III Db c T* X
Fisher 685SE and 685SR actuators have been
evaluated for ignition hazard and certified for CUTR
012/2011 under "protection by constructional
safety". To ensure conformity with CUTR, only Fisher
parts and materials can be used.
Instruction Manual
D103799X012
MATERIAL
ASTM A36 (steel)
ASTM A36 (steel)
ASTM A516 Grade 70 (steel) with
fluoropolymer coated bore
ASTM A36 (steel)
ASTM A36 (steel)
ASTM A311 1045, Class B (steel)
S31603 (316L Stainless Steel)
ASTM A36 (steel)
(5)