Introduction – Flowserve V-370 R3 Edward Valves User Manual

Page 2

EDWARD UNIVALVE USER INSTRUCTIONS ENGLISH 12-13

INTRODUCTION

EDWARD CUSTOMER SERVICE
Consult your Edward factory inside sales representative for

information on obtaining repair tools.
As always, field sales and service personnel are available

to assist with maintenance and repairs involving Edward

valves. And they are backed up by factory-trained specialists

to lend additional assistance whenever needed.
An improved low-maintenance Univalve design... tools for

fast in-line repairs...and reliable Edward service!

Seat Refinishing Tool

Bonnet Torquing Collar

Seal Weld Cutting Machine

THREE TOOLS FOR FASTER IN-LINE REPAIRS OF

EDWARD UNIVALVES
Edward Univalves aren’t likely to require any maintenance

or repair work until they’ve been in services for quite a few

years. But sooner or later – depending on the nature of the

fluids, frequency of operation and time in service – Univalve

seats and disks may need to be repaired.

The Seat Refinishing Tool has

a self-centering head of multiple

tungsten carbide cutters on a

spindle which is hand-operated

with a speed wrench for complete

seat refinishing. Lapping or other

finishing work is not required to

produce refinished seats.
Seat damage, such as that

produced by foreign materials

in the line fluids, can be repaired

quickly.

The Bonnet Torquing Collar

is essentially a torque wrench

adapter that is used to remove

and reassemble the bonnet of an

unwelded Univalve.
The tool facilitates reassembly

of the bonnet with the required

torque correctly applied to ensure

that the graphitic body-bonnet

gasket is properly loaded to

establish a leak-tight seal. The tool

may also be used to assemble and

disassemble seal-welded valves.

The Seal Weld Cutting Machine

has the ability to cut both fillet

and canopy welds. By removing

the handwheel and yoke, then

installing the machine, seal welds

can be cut, leaving a suitable weld

prep. The machine is operated by

one person and uses conventional

plant air.

TABLE OF CONTENTS
Edward Customer Service ..............................................2
Three Tools for Faster In-line Repairs

of Edward Univalves ........................................................2
Exploded View .................................................................3
Disassembling the Univalve ....................................... 4–5
Servicing Edward Univalve Stop and Stop-check Valves ..6
Servicing Edward Univalve Check Valves ........................7
Alternate Weld-cutting Methods for Univalves ................8
Univalve Maintenance Tools ..................................... 9–13
Reassembly of the Univalve ................................... 14–17

Reassembly of Unwelded Bonnet Univalves .............14

Reassembly of Welded Bonnet Univalves .................14

Replacing the Seal Weld Univalves ...............................18

A105 and F22 Univalves ...........................................18

F316 and F347 Univalves ..........................................18

Operational Recommendations ..............................19–20
General Information ............................................... 21–22

TABLES
Valves With No Prefix in Figure Numbers .............. 10–11
Valves With “B” Prefix Figure Numbers ........................12
Valves With “C” and “D” Prefix Figure Numbers* .........13
Unwelded Univalve Bonnet Gasket Torques ..................15
Welded Univalve Bonnet Torques .................................16
Torque Range for Packing Gland Bolts .........................17
Minimum Torque for Closing Valves —

ft-lb on Main Seat

.......................................................................

Impactor Handle/Handwheel Performance Chart ..........20