Flowserve V-370 R3 Edward Valves - Manual (Page 2)

EDWARD UNIVALVE USER INSTRUCTIONS ENGLISH 12-13
2
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 ....................................................................... 19
Impactor Handle/Handwheel Performance Chart ..........20