Emerson A31A Manual de instrucciones descargar pdf (Pagina 2)

A31A Valve

Instruction Manual

Form 5291

March 2008

Table 1. Specifications

Valve Size and End Connection Styles

NPS J 14, J 16, J 18, J 20, and J 24 valves,

and in J wafer-style (flangeless) or

J single-flange (lugged) with raised-face flanges,

CL150 or 300

Maximum Pressure Drop

(1)

Consistent with CL150 and 300

pressure/temperature ratings per ASME B16.34

unless further restricted by values given in

figure 2

Shutoff Classification Per ANSI/FCI 70-2

and IEC 60534-4 or MSS SP-61

Standard Soft Seal: Bidirectional shutoff Class VI

(bubble-tight)

NOVEX Seal: Unidirectional shutoff MSS SP-61

(reverse flow direction only) Class VI optional

Phoenix III Seal: Bidirectional shutoff Class VI

(bubble-tight)

Phoenix III Seal for Fire-Tested Applications:

Unidirectional shutoff Class VI (reverse flow

direction only) (bubble-tight).

Fire Tested per API 607 Rev. 4

Available Seal Configurations

Standard Constructions

See figure 3 and table 2

Standard Construction Materials

See table 2

Material Temperature Capabilities

(1)

See table 2

Flow Characteristic

Modified equal percentage

Flow Coefficients

See Catalog 12 and bulletin 21.1:A31A

Flow Coefficient Ratio

(2)

100 to 1

Noise Levels

See Catalog 12 for sound/pressure level

prediction

Valve In-Line Position

Shaft horizontal. See figure 4

Valve/Actuator Action

With diaphragm or piston rotary actuator,

field-reversible between:

J push-down-to-close (extending actuator rod

closes valve) and

J push-down-to-open (extending actuator rod

opens valve)

Valve Body Classification

Face-to-face dimensions are in compliance with

MSS SP68 and API 609 standards; Valve bodies

are designed for installation between ASME

B16.5 CL150 and 300 raised-face flanges

Disc Rotation

Clockwise to close (when viewing from the drive

shaft end) through 90 degrees rotation

Shaft Diameter and Approximate Weight

See tables 3 and 4

ENVIRO-SEALr Packing

This optional packing system provides improved

sealing, guiding, and transmission of loading force

to control liquid and gas emissions. Contact your

Emerson Process Management sales office for

availability of ENVIRO-SEAL packing

1. The pressure/temperature limits in this manual, and any applicable code or standard limitation should not be exceeded.

2. Ratio of maximum flow coefficient to minimum usable flow coefficient may also be called rangeability.

1 2 3 4 5 6 7 ... 23 24

(NPS 14 through 24) 1
A31A Valve 10

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Emerson A31A Manual de instrucciones Pagina 2

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