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585C
User Manual
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Fisher 585C User Manual

585C Actuator
D102086X012
Fisher™ 585C Piston Actuators
The 585C linear piston actuator is a powerful, double-acting actuator that provides accurate throttling or on-off operation for sliding-stem control valves.
The 585C has a wide-range of supply pressure capabilities, up to 150 psig. As the 585C is double-acting, the positioner supplies air to both sides of the piston, resulting in stiff, precise movement and control.
Product Bulletin
61.2:585C
March 2021
For more information contact your Emerson sales
office.
Features
n High Thrust Capability-- With standard air supply,
the Size 130 Fisher 585C can produce up to 111,000 Newtons (25,000 lbs) of force.
n Wide Range of Sizes-- The 585C family of actuators
offers a wide range of sizes, with piston areas of 168 sq cm (26 sq in) up to 1,429 sq cm (221.5 sq in).
n Rugged Construction-- The 585C standard yoke
material is ductile iron, resulting in robust construction and increased thrust capability.
X0175-2
FISHER 585C PISTON ACTUATOR
WITH FIELDVUE™ DVC6200f DIGITAL VALVE CONTROLLER
n Broad Travel Capability-- 585C piston actuators
provide standard travel lengths of up to 203 mm (8 inches).
n High-Performance Instrumentation-- 585C
actuators are available with a variety of positioners and accessories, including the FIELDVUE DVC6200 digital valve controller. The 377 trip valve and tank system are also available for fail-safe action.
n Low Ambient Temperature-- Option available for
applications with ambient temperatures down to
-60° C (-76° F). Uses Fluorosilicone O-rings and Nitronic 50 stem connector assembly. Compliant to GOST 15150.
www.Fisher.com
Product Bulletin
61.2:585C March 2021
Figure 1. Fisher 585C Piston Actuator Components
SPRING
(SIZES 25 AND 50)
585C Actuator
D102086X012
CYLINDER
TRAVEL STOP
STEM O-RING
SEAL BUSHING
TRAVEL INDICATOR
ACTUATOR STEM
W7447-1
PISTON
PISTON O-RING
CAP SCREW
YOKE
STEM CONNECTOR
Contents
Features 1.....................................
Specifications 3................................
Features and Advantages 4......................
Principle of Operation 4.........................
Instrument and Accessory Selection 6.............
2
Installation 6..................................
Actuator Data 6................................
Handwheel Specifications 12.....................
Dimensions 13.................................
585C Actuator
D102086X012
Specifications
Product Bulletin
61.2:585C
March 2021
Operating Pressure
(1)
Sizes 25-50:
Maximum Allowable: 10.3 bar (150 psig) Minimum Recommended: 1.4 bar (20 psig)
Sizes 60-130:
Maximum Allowable: See table 8. Minimum Recommended: 2.4 bar (35 psig)
Travel
See table 2
Thrust Capabilities
See tables 4, 5, 6, 7, and 8
Stroking Speeds
Varies with actuator size, actuator spring, travel, and supply pressure. If stroking speed is critical, consult your Emerson sales office
Piston Area
See table 8
Cylinder Volumetric Displacement
See table 2
Operative Temperature Limits
(1)
For All Sizes:
Standard Construction ( Nitrile O-Rings): -40 to 80_C (-40 to 175_F) Optional Construction (Fluorocarbon O-Rings): -18 to 149_C (0 to 300_F)
For Sizes 60 through 130:
Optional Low Ambient Temperature (Fluorosilicone O-Rings): -60 to 80_C (-76 to 175_F)
Yoke Boss and Valve Stem Diameters
See table 3
Pressure Connections
Construction Materials
Part Material
Yoke Ductile Iron Piston Aluminum Cylinder Aluminum
Bolting and Fasteners
Springs (sizes 25 & 50 only) Alloy Steel
O-Rings
Actuator Stem Chrome-plated Steel
Stem Connection (sizes 60-130 only)
Travel Indicator Scale Stainless Steel Paint Polyester Powder Actuator Stem
(sizes 60-130 only)
Cylinder Seal Bushings (sizes 60-130 only)
Instrument Mounting
Universal NAMUR mounting
Approximate Weights (less positioner and handwheel)
Size 25:
2-1/8 inch yoke boss, 7 kg (16 lbs) 2-13/16 inch yoke boss, 8 kg (17 lbs)
Size 50:
2-13/16 inch yoke boss, 20 kg (45 lbs) 3-9/16 inch yoke boss, 22 kg (48 lbs)
Size 60: 31 kg (68 lbs) Size 68: 54 kg (120 lbs) Size 80: 102 kg (225 lbs) Size 100: 113 kg (250 lbs) Size 130: 188 kg (415 lbs)
Options
Sizes 25 and 50:
J Top-mounted handwheel, see figures 6 and 7 and
table 9
J Cylinder bypass valve J Limit switches J Fisher
Sizes 25 and 60:
J 1/4 NPT internal (standard), or J 3/8 NPT internal
(optional)
Size 50:
J 1/4 NPT internal (standard), or J 1/2 NPT internal
(optional)
Sizes 68-130:
J 1/2 NPT internal (standard)
Dimensions
See figures 6 and 7
1. The pressure/temperature limits in this bulletin and any applicable standard or code limitation for valve should not be exceeded.
4200 position transmitter
Sizes 60-130:
J Integral side-mounted handwheel, see figure 8 and
tables 9 and 12
Sizes 25-130:
J FIELDVUE mounting options J Fisher 377 trip valve system to fail actuator J Up or J down or J lock in last position J TopWorx DXP M21GNEB electrical valve stem
position switch
J Micro-Switch limit switches
Steel NCF (std) Stainless Steel (std and low ambient)
Nitrile (std), Fluorocarbon, Fluorosilicone, or EPDM
Zinc-plated Steel (std) Stainless Steel (std and low ambient)
S41600 (416) SST, Chrome Plate
Brass
3
Product Bulletin
61.2:585C March 2021
Features and Advantages
Table 1. Features and Advantages
FEATURES ADVANTAGES
High thrust capability
Stroke Length Capability Depending on size, strokes of up to 203 mm (8 inches) are available.
Wide range of sizes The 585C is available in standard sizes 25, 50, 60, 68, 80, 100, and 130.
Valve mounting capability
Positioner mounting capability
High frequency response The double acting construction allows quick response to instrument signals.
Stiff construction
Handwheels
Bias springs
With air supply capability of up to 150 psig, the 585C can produce up to 111,000 Newtons (25,000 pounds) thrust to overcome high valve unbalance.
Depending on size, the 585C can be mounted to yoke boss diameters of 2-1/8 inches through 5-inches, and valve stem diameters of up to 1-1/4 inch.
Universal NAMUR mounting provides a consistent mounting method for all sizes. This mounting capability provides vibration resistance per ISA-S75.13.
Pressure on both sides of the piston, plus the relatively small volume of air within the cylinder, results in stiff, precise positioning.
585C size 25 and 50 actuators are available with a top-mounted handwheel. All other 585C actuator sizes can accommodate a side-mounted handwheel.
The sizes 25 and 50 are available with bias springs. A bias spring under the piston fully retracts the actuator stem upon loss of supply air, while a bias spring on top of the piston fully extends the actuator stem. The spring bias mode is easily reversed without the need for additional parts.
585C Actuator
D102086X012
Figure 2. Fisher 585C Piston Actuator Without Springs
E0409
Principle of Operation
The 585C piston actuator (figures 1 and 2) uses a piston that moves inside the actuator cylinder. An O-ring (see figure 1) provides a seal between the piston and the cylinder.
From an equilibrium state, the actuator reacts to a force unbalance that is created by increasing supply pressure on one side of the piston,and decreasing it on the other. This moves the piston up or down, and results in a repositioning of the valve control element.
4
585C Actuator
D102086X012
Product Bulletin
61.2:585C
March 2021
Figure 3. Fisher 585C Piston Actuator with Handwheel
Figure 4. Fisher 585C Piston Actuator with Spring Return
E0410
Actuator with Handwheel (figures 3 and 6)
The handwheel version can be used to open or close the valve manually (either during normal operation or in an emergency), to position the valve at any point in the stroke, or to act as a travel stop.
Size 25 and 50 actuators use an integral top-mounted handwheel. See figure 6.
Size 60 to 130 actuators use a side-mounted handwheel, and come with a spring-loaded ball detent which prevents vibration from changing the handwheel setting. Handwheels for most types are either 203 mm (8 inches) in diameter with beveled gears or 432 mm (17 inches) in diameter with worm gears.
W7447-1
Actuator with Spring Return (figure 4)
585C size 25 and 50 actuators are available with bias springs. The 585C actuator with bias spring has the spring under the piston and fully retracts the actuator stem upon loss of cylinder pressure. The bias spring in the 585CR actuator is on top of the piston and fully extends the actuator stem upon loss of cylinder pressure. No additional parts are required to convert from one actuator type to the other.
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