Emerson Fisher 3025 Ficha Técnica descarregar pdf (Página 2)

3025 Actuator

D102789X012

Product Bulletin

61.1:3025

March 2012

Specifications

Operating Pressure Range

See tables 3 and 4

Maximum Travel

Sizes P462 and P900: 120 mm (4.75 inches)

Size P460-200: 200 mm (8 inches)

Output Indication

Stainless steel disc or pointer and graduated scale

Stroking Speed

Dependent on actuator size, travel, spring rate, initial

spring compression, and supply pressure. If stroking

speed is critical, consult your Emerson Process

Management sales office

Operating Temperature Range

-30 to 80_C

Volumetric Displacement

See table 2

Signal Connection

1/2 NPT internal

Effective Diaphragm Area

See table 4

Maximum Pressure

4barg

Construction Materials

Diaphragm Casing: Steel

Diaphragm: Nitrile on nylon

Diaphragm Plate: Steel

Actuator Spring: Steel alloy

Actuator Stem: Steel alloy

Travel Indicator: Stainless steel

Yoke: Steel

Stem and Yoke Boss Diameters

ACTUATOR

SIZE

YOKE BOSS

DIAMETER

(Inches)

STEM DIAMETER

mm Inches

P462 and

P460-200

3-9/16

(1)

19.1

25.4

31.8

3/4

1-1/4

P900

(1)

25.4

31.8

1-1/4

1. H = Heavy actuator to valve bolting.

Dimensions and Weights

Seetables5,6,and7andfigures3,4,and5

Options

J Side-mounted gear handwheel, J Oversize signal

connections

Available Configurations

The 3025 actuator can be supplied in either direct or

reverse action.

Direct Action

In direct action, applying air pressure to the upper

diaphragm casing forces the actuator stem downward.

When this pressure is reduced, the opposing spring

forcemovestheactuatorstemupward.Shouldthe

loading pressure fail, the spring forces the stem to the

extreme upward position. This provides fail-open

action for push-down-to-close valves and fail-closed

action for push-down-to-open valves.

Reverse Action

In reverse action, applying air pressure to the lower

diaphragm casing forces the actuator stem upward

against the opposing spring force. When this loading

pressure is reduced, the spring moves the actuator

stem to the extreme downward position. Should the

loading pressure fail, the spring forces the stem to the

extreme downward position. Reverse acting actuators

provide fail-closed action for push-down-to-close

valves and fail-open action for push-down-to-open

valves.

1 2 3 4 5 6 7 ... 11 12

Comentários a estes Manuais

Sem comentários

Emerson Fisher 3025 Ficha Técnica Página 2

Comentários a estes Manuais

Manuais e produtos relacionados com não Emerson Fisher 3025