GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
26
Typical Forged Bolted Bonnet Globe Valve Expanded View
1. Disc
Plug type disc is machined to the tightest tolerances to ensure
trouble free shut off and cycling.
2. Disc Nut
The disc nut (where applicable) secures the disc to the stem. A
tack weld or a lock ring may also be used.
3. Lock Groove
The lock groove attaches to the disc directly or a disc nut in
some designs.
4. Stem
The stem insert vertically into the disc.
5 & 19. Gland Bolts & Nuts
The gland bolt and nut allows for easy adjustments for packing
compression.
6. Stuffing box
The stuffing box contains the packing.
7. Stem Nut
The stem nut provides a precision guide for proper stem
alignment.
8. Seat Ring
Can be separate or integral. Ensures a stable shut off, the seat
ring is aligned into the valve, then precision ground for optimal
seating.
9. Body
Forged steel bodies provide a low resistance flow and optimum
strength and performance.
10. Bonnet Gasket
The bonnet gasket creates a leakproof seal between the bonnet
and body.
11. Bonnet
Bonnet assemblies are built to the same standards as the
bodies.
12. Bonnet Bolts
The bonnet bolts secure the bonnet to the body.
13. Packing
The packing creates a seal above the back seat, between the
bonnet and stem.
14. Gland
Compresses the packing to create a stem seal above the back
seat, between the bonnet and stem.
15. Gland Flange
Applies pressure to the gland for accurate packing compression.
16. Handwheel
The handwheel cycles the valve.
17. Handwheel Washer
The washer helps to prevent loosening
18. Handwheel Nut
The handwheel nut secures the handwheel to the bonnet
assembly.
18
17
16
19
15
14
13
12
11
10
9
4
3
2
1
5
6
18
5
7
8
*Example only refer to as built drawing as there are numerous designs for different sizes, classes, bonnet types & design standards.
FIGURE 9
