11-3
11-4. Assembling the parts of the gland
11-4-1. Preparation for assembly
(1) Checking the surface condition of the parts
Any flaw or the like on the surface of the parts may cause leakage from that area, resulting in
a total amount of leakage from the gland that exceeds the specified value. Therefore, check the
surface of the following parts.
Table 11-1. Parts to be checked for surface condition
Part Checkpoints Possible problems
Stem
• No flaws or defects,
including scratches and
dents
• No rust or corrosion
• The entire surface is even.
• No burrs
• Clean surface, with no
adhering coating material,
powder, or dirt.
• If necessary, take necessary
measures such as cleaning
with alcohol.
If the problems stated on the left
remain, fluid leaks from flawed
areas may cause the total amount
of leakage from the gland to exceed
the specified value.
Stuffing box
Both ends of the spacer
Packing follower
Packing contact surface
O-ring groove
Packing flange
Gland nut contact
surface
The total amount of leakage from
the gland may exceed the specified
value because of insufficient
tightening.
Packing flange (entire
surface)
Gland stud
Gland nut
• No flaws, rust, or defects
The problems on the left, if they
remain, can cause control valve
damage, leading to injuries.
To Next Page
Loading...
