Flowserve V-377 R4 Edward Valves - Manual (Page 4)

4
Flow Control Division
Edward Valves
The procedure to be followed in making
the repair is then explained. This includes
normal valve maintenance as well as major
valve repair. Field repair equipment, avail-
able from Edward, is described and
illustrated. Valve lubrication and welding
rod recommendations are also made.
These procedures are adequate for almost
any pressure-seal valve repair or mainte-
nance problem that may arise in the field.
Following is the section describing the
disassembly procedure for the various
valve components; for example, manual of
Limitorque operators, valve yokes, and the
four basic bonnet types. It is very impor-
tant that the Introduction and the para-
graphs titled “First Determine the Area of
Failure” be read and understood before
any disassembly work is begun. Several
procedures are described, depending upon
the area of failure. Considerable time can
often be saved by first selecting the proper
disassembly procedure.
The last major section explains how the
various valve constructions are to be
reassembled. Information on how to
contact Edward for additional advice, if
required, and how to order parts is
included.
Description of
Pressure-Seal Valve Types
Edward pressure-seal valves are built with
four basic bonnet arrangements to provide
the most suitable designs for the wide
range of sizes and pressure classes
offered.
Type I is the studded bonnet design as
shown. It uses the basic pull-up construction
with studs in the bonnet projecting through
the retainer for tightening by use of nuts. It
is a simplified design employed in moder-
ate pressure applications and certain valve
sizes, as shown in the following table.
Description of Pressure-Seal Bonnet Types – Type I
Type I
Illustration No. 1
Pressure-Seal Bonnet
Fig. No. Pressure Rating Type of Valve Size
602Y 600 Flite-Flow Globe Stop-Check (Y-Type) 6-20
606 and 606Y 600 Globe Stop-Check 8-14
607 and 607Y 600 Angle Stop-Check 8-14
614Y 600 Flite-Flow Globe Stop (Y-Type) 6-20
616 and 616Y 600 Globe Stop 8-14
617 and 617Y 600 Angle Stop 8-14
692Y 600 Flite-Flow Check (Y-Type) 16-20
694 and 694Y 600 Horizontal Check 8-14
695 and 695Y 600 Angle Check 8-14
702Y 600-SPL Flite-Flow Globe Stop-Check (Y-Type) 16-20
714Y 600-SPL Flite-Flow Globe Stop (Y-Type) 6-20
792Y 600-SPL Flite-Flow Check (Y-Type) 16-20
1602Y Special Flite-Flow Globe Stop-Check (Y-Type) 16-20
1614Y Special Flite-Flow Check Stop (Y-Type) 16-20
1692Y Special Flite-Flow Check (Y-Type) 16-20
1802Y Special Flite-Flow Globe Stop-Check (Y-Type) 16-20
1814Y Special Flite-Flow Globe Stop (Y-Type) 16-20
1892Y Special Flite-Flow Check (Y-Type) 16-20
Type I