Fisher® 1035/El-O-Matic0 pages

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1035/El-O-Matic Actuator

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D500241X012

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Product Bulletin

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22.1:1035

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January 2013

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Fisher® 1035/EI-O-Matic

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Rack-and-Pinion Rotary Actuator

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Fisher 1035/El-O-Matic double-acting and

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spring-return rotary valve actuators are compact,

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simply-designed control devices quality-engineered to

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provide high torque outputs to 5700 N»m (50,000

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lbf»in) and a high cycle life.

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A compact, dual-opposed rack and pinion design and

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guide band suspension system combine to produce a

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symmetrically balanced, center-mount actuator with a

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short powerful stroke and rapid response. A fully

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concentric operating load capability provides

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optimum performance.

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Features

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■ Three Point Suspension System—Three carbon-filled

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PTFE guide bands provide a low friction bearing

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surface for piston alignment and rack support.

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Elimination of metal-to-metal contact between

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pistons and cylinder wall reduces friction for

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outstanding cycle life, smooth piston travel, and

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maximum power.

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■ Balanced Piston Design—As part of the design, three

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equally spaced bearing surfaces are cast into each

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piston. The rack and pinion construction results in

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even distribution of bearing loads, optimum gear

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engagement, and reduced piston tilt. Equal spring

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force applied to each piston enhances actuator life.

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■ Multiple Constructions—Conversion from double

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acting to spring return, or vice versa, is simple and

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safe, thus reducing spare part requirements.

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Valve/actuator action is also field reversible.

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1035/EI-O-Matic Actuator with Fisher A41 Valve

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Dual Stop Adjustment—This adjustment is standard

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on all E Series actuators. The P Series actuators are

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supplied with a limit plate adjustment feature.

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Dual Piston Design—Air pressure applies a balanced

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force across the common pinion gear (see figure 1).

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Symmetrically balanced center mount construction

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eliminates undue stress on the valve stem,

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bearings, and disc.

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www.Fisher.com

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EMERSON

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Process Management

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