Emerson Fisher 585C Data Sheet

585C Actuator

D102086X012

Fisherr 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 piston actuator family is available in sizes 25
to130tocoverawiderangeofthrustandtravellength
requirements. It can be used with switching valves for
on-off control, or with the DVC6200 digital valve
controller or 3600 positioner for throttling
applications.

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.

Information for the 585CLS long stroke actuator can
be found in Fisher bulletin 61.2:585CLS
(D103792X012).

Product Bulletin

61.2:585C

September 2014

Features

 High Thrust Capability-- With standard air supply,

the Size 130 Fisher 585C can produce up to 111,000
Newtons (25,000 lbs) of force.

 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).

 Rugged Construction-- The 585C standard yoke

material is ductile iron, resulting in robust
construction and increased thrust capability.

X0175-1

Fisher 585C Piston Actuator

with FIELDVUE™ DVC6200 Digital Valve Controller

 Broad Travel Capability-- 585C piston actuators

provide standard travel lengths of up to 203 mm (8
inches).

 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.

www.Fisher.com

Product Bulletin

61.2:585C
September 2014

Figure 1. Fisher 585C Piston Actuator Components

SPRING

(SIZES 25 & 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

September 2014

Operating Pressure

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

Seetables4,5,6,7,and8

Stroking Speeds

(1)

Construction Materials

Part Material

Yoke Ductile Iron

Piston Aluminum

Cylinder Aluminum

Bolting and Fasteners NCF (non-corroding finish)

Springs(sizes25&50only) Alloy Steel

O-Rings Nitrile (std), Fluorocarbon, or EPDM

Actuator Stem Chrome-plated Steel

Stem Connection Stainless Steel

Travel Indicator Scale Stainless Steel

Paint Polyester Powder

Actuator Stem

(sizes 60-130only)

Cylinder Seal Bushings

(sizes 60-130only)

Varies with actuator size, actuator spring, travel, and
supply pressure. If stroking speed is critical, consult

Instrument Mounting

your Emerson Process Management sales office

Universal NAMUR mounting

Piston Area

See table 8

Cylinder Volumetric Displacement

See table 2

Operative Temperature Limits

(1)

For All Sizes:

With Nitrile O

-

Rings: -40 to 80_C(-40to175_F),

standard

With Fluorocarbon O

-

Rings: -18 to 149_C

(0 to 300_F), optional

Approximate Weights (less positioner and
handwheel)

Size 25:
2-1/8inchyokeboss,7kg(16pounds)
2-13/16 inch yoke boss, 8 kg (17 pounds)
Size 50:
2-13/16 inch yoke boss, 20 kg (45 pounds)
3-9/16 inch yoke boss, 22 kg (48 pounds)
Size 60: 31 kg (68 pounds)
Size 68: 54 kg (120 pounds)
Size 80: 102 kg (225 pounds)
Size 100: 113 kg (250 pounds)
Size 130: 188 kg (415 pounds)

Yoke Boss and Valve Stem Diameters

Options

See table 3

Sizes 25 and 50:

Pressure Connections

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/temperaturelimits in this bulletin andany applicable standardor code limitation for valve should not be exceeded.

J Top-mounted handwheel, see figures 6 and 7 and

table 9

J Cylinder bypass valve J Limit switches J Fisher

4200 position transmitter
Sizes 60-130:

J Integral side-mounted handwheel

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

S41600 (416) SST, Chrome Plate

Brass

3

Product Bulletin

61.2:585C
September 2014

Features and Advantages

Table 1. Features and Advantages

Features Advantages

High thrustcapability

Stroke Length Capability Depending on size, strokes of up to 203 mm (8 inches) are available.

Wide range of sizes The 585Cis availablein standard sizes 25, 50, 60, 68,80, 100, and 130.

Valve mounting capability

Positioner mounting capability

High frequencyresponse The doubleacting construction allows quick responseto instrument signals.

Stiff construction

Handwheels

Bias springs

With air supplycapability of up to150 psig, the 585C can produce up to 111,000Newtons (25,000pounds) 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 ofthe piston, plus the relatively smallvolume ofair withinthe cylinder,results instiff, precise

positioning.

585C size25 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 ontop 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

The585Cpistonactuator(figures1and2)usesa
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

September 2014

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 & 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.

5