5
KeysTOne
K-LOK
®
SerieS 360/362 and 370/372
InstallatIon, operatIon, MaIntenance and troubleshootIng
Inspecting the valve components
1. after disassembly, visually inspect the seat
retainer ring (14) and the bottom cover
plate (7).
2. Make sure all body sealing surfaces:
• are flat
• are free of corrosion damage
• have a smooth surface
• are free of burrs.
remove any burrs with fine grit sandpaper.
3. inspect for scratches around disc edges:
• If scratched, smooth the edge with fine
grit sandpaper (220/400 wet/dry
sandpaper)
• Remove the scratch by using a blending
motion and extend the smoothed area at
least two inches above, below and around
the original scratch
• To polish the disc edge, use a powered
wire brush
• Finish sand or polish the edge on a lathe,
as required.
4. Check to see that the upper and lower
(2B, 2C) stem-to-bushing (5) contact
locations are free of galling.
5. Check to see that the upper (2B)
stem-to-packing (9) contact area is free of
scratches.
removing the stem bushings
1. insert the removal tool in the valve body (1)
top plate area and down the upper stem
journal until the tool contacts the upper
stem bushing.
note:
a special bushing removal/installation
tool is required to remove or install the stem
bushings (5). The tool O.d. dimension should
be as near in size as the valve stem bore i.d.
dimension and have a Class 3 fit. any Machinist
Handbook can provide Class 3 tolerances.
2. remove the upper stem bushing (5) by
striking the tool with a hammer.
3. insert the removal tool in the valve body (1)
bottom plate area and down the lower stem
journal until the tool contacts the lower
stem bushing.
4. Strike the tool until the lower stem bushing
(5) is clear of the lower body stem journal.
removing the packing assembly
Method 1: for packing replacement with stem
in body
Using the screws, grab and remove each
packing ring, one at a time.
Method 2: packing removal with stem
removed from body
To remove the packing set (9) with the upper
stem removed, use a hook-type tool to pull out
one packing ring at a time.
note:
to remove the packing set (9) with the
upper stem (2B) still in the valve body (1), two
long, slender screws are required. The screws
must not have a diameter greater than ¼" and
must be at least six inches long. The most
commonly used screws are "drywall screws."
removing the seat retainer ring
remove the seat retainer ring (14) by removing
the hex socket screws (20) or seat retainer
screws (30) and the clips (21) for lugged body,
or the locating plates (21) for the wafer body.
(See Figure 5)
removing the seat retainer gasket
remove the seat retainer gasket (13). Use a
powered wire brush tool to remove the gasket
material that may have adhered to the mating
body surfaces.
removing the seat assembly
To remove the seat assembly, treat the seat
(11) and its associated components as a single
assembly by removing the following:
• Seat (11)
• Wire wrap (12A)
• Seat backing ring (12B)
Figure 5
- Seat retainer ring and parts.
Figure 6
- Shows partial insertion of the stem bearing.
