V-376
Edward Valves
Maintenance Manual for Edward
Forged Steel Valves
Bolted and Screwed Bonnet Types
V-376 R3
V-376 R4
Seats and Seat Finishing......................5
Disks and Disk Tack Welds ...................6
Backseat and Packings.........................7
Gland Bolts ........................................8
Reassembly.........................................9
General Information...........................10
Servicing Edward Forged Steel Valves...3
Introduction ........................................4
Contents
Flow Control Division
Edward Valves
3
STRAIGHTWAY
Figure 1441
BLOW-OFF
VALVE
Bolted Bonnet, Bolted Gland, O.S.& Y
VALVE
BLOW-OFF
ANGLE
Figure 1443
Bolted Gland, O.S.& Y
Bolted Bonnet Stop,
Fig. 1048Y
Typical
Valve
Designs
Ser vicing Edward Forged Steel Valves
Bolted Cover Piston Check
Fig. 838
4
Screw, Screwed-in Seat
Screwed Gland, Inside
Screwed Bonnet Stop,
Fig. 158
Flow Control Division
Edward Valves
Tools
Most Edward Forged Steel valves may be
readily disassembled with ordinary hand
tools. For the removal of screwed-in valve
seats, a special wrench may be necessary.
Disassembly
Be sure line is not under pressure when dis-
assembling valves
Typical Identification Plates
Bolted Cover Strainer
Fig. 238
This manual is provided to help you
service your Edward Forged Steel valves.
Before disassembling any valve, we recom-
mend that you check the valve identifica-
tion plate and note size, figure number
and pressure class, so that you can identify
it in the appropriate Edward Valve catalog.
This catalog will show typical cross sec-
tions to help identify the various parts.
Introduction
Bolted Bonnet
In bolted bonnet/cover style valves, cap
screws should be removed (see page 3
and below). The bonnet assembly or cover
can then be removed and the interior of
the valve exposed.
Screwed Bonnet
Small valves of the screwed bonnet type
are disassembled by unscrewing the
bonnet.
Screwed Bonnet Construction
Flow Control Division
Edward Valves
5
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