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5
IOM-WKM-BALL-370D5
DISTRIBUTED VALVES
TC9186
3. Install in line; either end may be installed upstream.
4. Install vent valve, if not already factory-installed.
5. On valves having extensions, check all extension piping and fittings to ensure that
all are tight prior to placing valve in service.
6. The seat sealant system is intended only for emergency shut-off. Do not lube.
(See Section III-C).
III. ON STREAM MAINTENANCE
This part covers maintenance and repair which can be performed without removing the valve
from the line.
A. BLOCK-AND-BLEED
With the line under pressure the valve body cavity can be vented to atmosphere and com-
pletely drained down with the ball in the
CLOSED POSITION ONLY
.
The valve body cavity may be drained and flushed by:
1. Removing the special vent valve after pressure has been vented.
2. Removing the 1/2” NPT relief valve from the upper body area.
3. Flushing through upper relief valve connection and allowing drainage through the
lower vent plug connection.
D I S T R I B U T E D V A L V E S
Installation, Operation and Maintenance Manual
4
W-K-M 370D5
B. STEM SEAL O-RING REPLACEMENT
NOTE: ON NEWER VERSIONS OF THE 370D5 BALL
VALVE, THE ADAPTER PLATE AND STOP
COLLAR ARE ONE-PIECE. (SEE FIG. A & B,
PAGE 4)
* On newer valves a needle valve is supplied in lieu of
a vent plug.
The 370D5 has two stem seals, one primary seal, backed up
by a second independent seal.
If the primary O-Ring seal becomes faulty, a leak will
occur through the gland plate vent plug.* In this case
remove 1/4" vent plug* and replace with 1/4" solid plug
to energize the secondary O-Ring seal.
1. To verify the integrity of the primary stem seal,
open the needle on the vent assembly plug.*
If the primary seal is faulty, close the needle valve
to energize the secondary seal.
KEY STOP
1991 -
FIG. A
FIG. B
1.
STEM
1. STEM
2.
KEY
2. KEY
3.
ADAPTER PLATE
3. ADAPTER PLATE
4.
STOP COLLAR
5.
NYLON WASHER
6.
STOP CAPSCREW
NOTE:
OLDER VALVES
HAVE A DOUBLE
BALL CHECK AND
GREASE FITTING.
BALL CHECK &
GREASE
FITTING
SPECIAL
VENT PLUG
BODY RELIEF
VALVE
NOTE:
DIFFERENT TYPE
VENT PLUGS OR DRAIN
VALVES MAY BE SUPPLIED.
STOP COLLAR
1963 - 1990
STEM
GLAND
BUSHING
ADAPTER PLATE
1/4" NPT
DRILLED PLUG.*
LEAKAGE
INDICATES
FAILURE OF
PRIMARY
STEM SEAL
PRIMARY
STEM SEAL
GLAND PLATE
UPPER THRUST WASHER
LINE
PRESSURE
5
6
1
2
1
2
3
3
4
D I S T R I B U T E D V A L V E S
Installation, Operation and Maintenance Manual
4
W-K-M 370D5
B. STEM SEAL O-RING REPLACEMENT
NOTE: ON NEWER VERSIONS OF THE 370D5 BALL
VALVE, THE ADAPTER PLATE AND STOP
COLLAR ARE ONE-PIECE. (SEE FIG. A & B,
PAGE 4)
* On newer valves a needle valve is supplied in lieu of
a vent plug.
The 370D5 has two stem seals, one primary seal, backed up
by a second independent seal.
If the primary O-Ring seal becomes faulty, a leak will
occur through the gland plate vent plug.* In this case
remove 1/4" vent plug* and replace with 1/4" solid plug
to energize the secondary O-Ring seal.
1. To verify the integrity of the primary stem seal,
open the needle on the vent assembly plug.*
If the primary seal is faulty, close the needle valve
to energize the secondary seal.
KEY STOP
1991 -
FIG. A
FIG. B
1.
STEM
1. STEM
2.
KEY
2. KEY
3.
ADAPTER PLATE
3. ADAPTER PLATE
4.
STOP COLLAR
5.
NYLON WASHER
6.
STOP CAPSCREW
NOTE:
OLDER VALVES
HAVE A DOUBLE
BALL CHECK AND
GREASE FITTING.
BALL CHECK &
GREASE
FITTING
SPECIAL
VENT PLUG
BODY RELIEF
VALVE
NOTE:
DIFFERENT TYPE
VENT PLUGS OR DRAIN
VALVES MAY BE SUPPLIED.
STOP COLLAR
1963 - 1990
STEM
GLAND
BUSHING
ADAPTER PLATE
1/4" NPT
DRILLED PLUG.*
LEAKAGE
INDICATES
FAILURE OF
PRIMARY
STEM SEAL
PRIMARY
STEM SEAL
GLAND PLATE
UPPER THRUST WASHER
LINE
PRESSURE
5
6
1
2
1
2
3
3
4