Flowserve Valtek GS User Manual

Valtek GS General Service Valve FCD VLENIM0300-00-A4 08/14
14
6. Remove the bonnet gasket (58).
7. Insert the Seat Change Tool (See Section 16: Special
Tools) into the body of the valve until the pin clicks
into place. Use a suitable torque wrench to remove the
seat ring.
8. Remove the seat ring (20) and profile ring (55).
9. Remove the plug (50) from the bonnet (40).
10. Use the Packing Driver Tool (See Section 16: Special
Tools) to remove the packing (88) and the packing box
ring (93).
11. Use a standard brass scraper or other suitable tool to
remove all old gasket material; then clean the gasket
surfaces.
NOTICE
Examine the valve trim and bon-
net components. If the nominal and
actual values differ by more than 5% a control valve
overhaul may be required (See Point 8, Page 9).
12. Check stressed surface areas for damage such as
scoring and deformities.
13. Use a standard brass scraper or other suitable tool to
clean bolting. Check for corrosion or any other damage.
Reassembly instructions of the valve body
assembly (standard or extended bonnet design).
14. Lubricate all bolt and screw threads and bearing sur-
faces (stem, underside of the nuts) with a suitable, ap-
proved lubricant (See Section 15: Lubricants).
NOTICE
Never allow lubricants to come in contact
with the bonnet or sealing surfaces.
15. Install and finger tighten a new profile ring (55) and
seat ring (20).
16. Insert the Seat Change Tool (See Section 16: Special
Tools) into the body of the valve and turn clockwise
using a suitable torque wrench (See Section 14:
Required Torque, for screwed seat rings).
17. Lower the plug (50) into the body and place it into
the seat ring (See page 18 for pressure balanced and
MultiStream trim).
18. Install the new bonnet gasket (58).
19. Carefully lower the bonnet (40) onto the plug in the
1
108
55
20
58
50
40
114
93
88
87
109
80
Figure 9: Disassemble / Reassemble the valve
Item Part Item Part
1 Body 87 Upper stem guide
20 Seat ring 88 Packing
40 Bonnet 93 Packing box ring
50 Plug 108 Stud bolt
55 Bonnet gasket 109 Belleville spring
58 Bonnet gasket 114 Hex nut
80 Packing follower
Table 11: Valve parts

Flowserve Valtek GS Specifications

General

Brand	Flowserve
Model	Valtek GS
Category	Control Unit
Language	English