Flowserve V-377 R4 Edward Valves - Manual (Page 47)

47
Flow Control Division
Edward Valves
8. Insert the gasket retainer segments in
the body groove.
9. Install the cover retainer.
10. Lift the cover, pressure-seal gasket,
and spacer ring assembly into con-
tact with the gasket retainer seg-
ments. Install the cover stud nuts.
11. Tighten the cover stud nuts in accor-
dance with the torque values shown
on page 10. All nuts must be tight-
ened uniformly in a star pattern to
avoid cocking the cover.
12. Replace the cover/cover retainer.
Type IV Pressure-Seal Bonnets –
Stop and Stop-Check
(Non-Return) Valves
See Illustration No. 27 on page 39.
1. Insert the disk, disk-nut, stem assem-
bly, or the disk-piston and stem, low-
ering carefully until they rest on the
valve seat. Hold the stem centrally in
the valve bore.
2. Insert the gasket retainer segments in
the body groove.
3. Install a new pressure-seal gasket on
the bonnet. Lower this assembly care-
fully into the body until it rests on the
gasket retainer segments.
4. If used, slip the spacer ring over the
bonnet and down on to the pressure-
seal gasket.
5. Lower the bonnet retainer over the
stem.
6. Install the bonnet retainer cap screws
in accordance with the torque values
shown on page 10. All nuts must be
tightened uniformly in a star pattern
to avoid cocking the bonnet.
7. Retrace disassembly steps 14, 12,
11, 10, 9, 6, and 5 on page 40.
8. Reassemble the operator to the valve
using a procedure opposite the disas-
sembly.
Type IV Pressure-Seal Bonnets –
Piston-Lift Check Valves
See Illustration No. 28 on page 41.
1. Insert the piston in the body, lowering
carefully until it rests on the valve
seat.
2. Insert the gasket retainer segments in
the body groove.
3. Install a new pressure-seal gasket on
the bonnet. Lower this assembly care-
fully into the body until it rests on the
gasket retainer segments.
4. If used, slip the spacer ring over the
bonnet and down on to the pressure-
seal gasket.
5. Install the bonnet retainer.
6. Screw in the bonnet retainer cap
screws in accordance with the torque
values shown on page 10. All nuts
must be tightened uniformly in a star
pattern to avoid cocking the bonnet.
7. Replace the large center bolt, insert-
ing it through the cover retainer and
threading it into the cover.
Reassembly Procedures for Metal Pressure-Seal Valves
(continued)