Emerson A31A Manual de instrucciones descargar pdf

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D500194X012

Type A31A High Performance Butterfly Valve

(NPS 14 through 24)

Contents

Introduction 1...............................

Scope of Manual 1..........................

Description 1...............................

Specifications Table 2.......................

Installation 4................................

Valve Orientation 5.........................

Before Installing the Valve 5..................

Adjusting the Actuator Travel Stops or Travel 8.

Installing the Valve 8........................

Packing Adjustment and Shaft Bonding 9......

Maintenance 10.............................

Removing and Replacing the Actuator 10......

Packing Maintenance 10.....................

Removing the Valve 11......................

Seal Maintenance 11........................

PTFE Seals 11............................

NOVEX, Phoenix III and/or

Phoenix III Fire-Tested Seals 14..........

Anti-Blowout Design, Packing, Valve Shaft,

Disc, and Bearing Maintenance 15..........

Installing the Two-Piece Shaft 16............

Gasket Retainer 18.........................

Parts Ordering 18............................

Parts List 19................................

Introduction

Scope of Manual

This instruction manual includes installation,

maintenance, and parts ordering information for NPS

14 through 24, Type A31A High-Performance

Butterfly Valves (see figure 1). Refer to separate

instruction manuals for information covering the

actuator and accessories.

Do not install, operate, or maintain a Type A31A

High-Performance Butterfly Valve without first

D being fully trained and qualified in valve, actuator,

and accessory installation, operation, and

maintenance, and D carefully reading and

understanding the contents of this manual. If you

have any questions about these instructions, contact

Figure 1. Type A31A Valve with Bettisr Actuator and

DVC6020 Digital Valve Controller

W9134-1

your Emerson Process Managementt sales office

before proceeding.

Description

The valve is available in either a flangeless wafer

body or a single-flange (lugged) body design, with a

variety of seals and internal components. The

pressure-assisted seal provides tight shutoff against

the full class pressure range for the specific type.

The keyed shaft combines with a variety of

handlevers, handwheels, pneumatic piston or

spring-and-diaphragm actuators. Maximum inlet

pressure/temperature ratings are consistent with

CL150 and 300.

Note

Neither Emerson, Emerson Process

Management, nor any of their affiliated

entities assumes responsibility for the

selection, use and maintenance of any

product. Responsibility for the

selection, use, and maintenance of any

product remains with the purchaser

and end-user.

Instruction Manual

Form 5291

March 2008

A31A Valve

1 2 3 4 5 6 ... 23 24

(NPS 14 through 24) 1
A31A Valve 10

Indice de contenidos

Pagina 1 - (NPS 14 through 24)

www.Fisher.comD500194X012Type A31A High Performance Butterfly Valve(NPS 14 through 24)ContentsIntroduction 1...Scope of Ma

Pagina 2

A31A ValveInstruction ManualForm 5291March 200810Figure 6. Optional Shaft-to-Valve Body Bonding Strap AssemblyVALVE BODYACTUATORAAVIEW A-A37A6528-AA31

Pagina 3

A31A ValveInstruction ManualForm 5291March 200811Usually, packing leakage can be eliminated bymerely tightening the hex nuts (key 15) locatedabove the

Pagina 4

A31A ValveInstruction ManualForm 5291March 200812Figure 7. Anti-Blowout Design DetailsC0758-1/ILCUTAWAY, INTERNAL DETAILSWARNINGAvoid personal injury

Pagina 5

A31A ValveInstruction ManualForm 5291March 200813Table 6. Torque Values for FastenersFASTENER NOMINALSIZERETAINING RING SCREWS GASKET RETAINING BOLTSN

Pagina 6

A31A ValveInstruction ManualForm 5291March 2008146. Manually rotate the upper shaft clockwise 180degrees to return the disc (key 2) to its closedposi

Pagina 7

A31A ValveInstruction ManualForm 5291March 200815This adjustment is necessary to be certain that theactuator output torque is fully absorbed by theact

Pagina 8

A31A ValveInstruction ManualForm 5291March 200816follower (key 102), jam nuts (key 17),anti-blowout flange (key 10), and the spring packassembly (key

Pagina 9

A31A ValveInstruction ManualForm 5291March 200817WARNINGAvoid personal injury or propertydamage caused by the impact of afalling or tipping of a large

Pagina 10 - A31A Valve

A31A ValveInstruction ManualForm 5291March 200818excessive force, use appropriate carewhen driving the pins into the disc huband shaft(s). Use the rig

Pagina 11

A31A ValveInstruction ManualForm 5291March 200819Repair KitsPTFE Repair kits include a single PTFE packing setand anti-extrusion washers. Graphite pac

Pagina 12

A31A ValveInstruction ManualForm 5291March 20082Table 1. SpecificationsValve Size and End Connection StylesNPS J 14, J 16, J 18, J 20, and J 24 valves

Pagina 13

A31A ValveInstruction ManualForm 5291March 200820Key Description Part Number26* Retaining Ring Gasket, Oxygen Service,CL150 (continued)NPS 20 V169962X

Pagina 14

A31A ValveInstruction ManualForm 5291March 200821Figure 9. Type A31A Wafer Style Valve AssemblyB2388-1/ILNPS 14 THROUGH 24CL150 AND 300NPS 14 CL150NPS

Pagina 15

A31A ValveInstruction ManualForm 5291March 200822Key 6* Backup RIngVALVE SIZE, NPS FKM NITRILE EPR CHLOROPRENE PTFE(1)Soft Seal PTFE / UHMWPECL15014 V

Pagina 16

A31A ValveInstruction ManualForm 5291March 200823Figure 10. ENVIRO-SEALr Packing Systems PTFE PACKING SYSTEM34B7524-BSTACKING ORDER OFPTFE PACKING RIN

Pagina 17

A31A ValveInstruction ManualForm 5291March 200824Key 21* GasketVALVE SIZE, NPSSOFT SEAL METAL / PHOENIX III SOFT SEAL & METAL / PHOENIX IIIStandar

Pagina 18

A31A ValveInstruction ManualForm 5291March 20083Figure 2. Maximum Pressure/Temperature RatingsB23352/ILTEMPERATURE LIMITATIONS DO NOT ACCOUNT FOR THE

Pagina 19

A31A ValveInstruction ManualForm 5291March 20084Table 2. Material Temperature RatingsCOMPONENT AND MATERIAL OF CONSTRUCTION(1)TEMPERATURE RANGE_C _FVa

Pagina 20

A31A ValveInstruction ManualForm 5291March 20085the limits given in this manual or onthe nameplates.D Use pressure-relieving devices asrequired by gov

Pagina 21

A31A ValveInstruction ManualForm 5291March 20086Table 3. Valve Body Data, CL150VALVE SIZE,NPSSHAFT DIA. ATYOKE BEARINGFACE-TO-FACEDIMENSION(1)MINIMUMI

Pagina 22

A31A ValveInstruction ManualForm 5291March 20087Table 4. Valve Body Data, Wafer-Style Valves, CL300VALVE SIZE, NPSSHAFT DIA. ATYOKE BEARINGFACE-TO-FAC

Pagina 23

A31A ValveInstruction ManualForm 5291March 20088Figure 4. Proper Installation StepsB2263-1/ILA5557/ILFigure 5. Properly Installed Wafer-Style ValveAdj

Pagina 24

A31A ValveInstruction ManualForm 5291March 20089D For Single-Flange Valves: Position the valvebetween the flanges. Be sure to leave enough roomfor the