Full Text Searchable PDF User Manual
Cl.CW
Clow Valve Co.
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902 South 2nd Street
Oskaloosa, IA 52577
14"-24" RESILIENT SEAT GATE
VALVE WITH NO GEARING
O&MMANUAL
TABLE OF CONTENTS
General Info/Installation Instructions
Operation/Inspection & Maintenance
Records
RW GV 14" & 16" Parts List
Recommended Spare Parts
RW GV 18" & 20" Parts List
Recommended Spare Parts
RW GV 24" Parts List
Recommended Spare Parts
14"
-
20" RW Valve Dissassembly
24" RW Valve Dissassembly
Troubleshooting
Telephone: 641 673-8611
Fax: 641 673-8269
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CLOW
Clow Valve Co.
GENERAL;
902 South 2nd Street
Oskaloosa, IA 52577
Telephone: 641 673-8611
Fax: 641 673-8269
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
RESILIENT SEAT GATE VALVE
Inspect all valves at time of delivery for shipping damage and to confirm compliance
with specifications. Valves are completely tested per the appropriate standards and
specifications by the manufacturer. The valves should be stored in such
a
manner to
protect them from weather and blowing dirt and debris. In cold climates, if water is
allowed to freeze in the valve, severe damage to the valve components could result.
Any packaging should be replaced if removed for inspection. Proper slinging and
handling methods should be used when moving valves. Do not place slings or other
devices around operating stem or through the valve port opening.
I.
Installation
1.
Check that valve end joints are clean. Again check for damage to the valve. Open and
close valve to insure proper operation. Close wedge before placing valve in trench or line.
2.
Handle valve carefully. Do not drop into position. Do not sling through
the port opening.
3.
Prepare pipe ends according to manufacturer's instructions. Install valve
per proper methods according to end joint type. All piping should be
properly supported to avoid line stress on the valve. Do not use the
valve as
a
jack to force
a
pipeline into position.
4.
A valve box or vault should be provided for each valve used in buried service application.
These should be installed such that no load is transferred to the valve.
5.
Before pressurization of the pipeline and valve, all pressure containing bolting (cover,
follower plate, end connection) should be inspected for adequate tightness (usually 90 ft.
lb.).
6.
Buried valves should be pressurized before backfilling.
7.
With valve in open position, the entire system should be thoroughly flushed to clean the
system. Debris in the valve could prevent valve from closing or possibly damage the
resilient material on the wedge.
8.
Upon completion of the installation: gate valve location, size, type, date of installation,
number of turns to open, direction of opening, and any other special information should be
entered on permanent records.
A Division of Mc Wane, Incorporated
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II.
Operation
1.
Do not operate valves in systems that exceed the rated working pressure of the valve,
(14"-24" 250 psi).
System should be completely flushed before valve is operated in normal cycle.
2.
The RJW valve opens and closes by turning the main valve stem with an operating nut or
handwheel. The valve closes by compressing the resilient material bonded to the wedge
against the valve body. As the material is being compressed (at end of closing cycle)
torque requirements will approach maximum. Opening the valve requires significantly
less torque.
3.
If the valve should fail to seal after necessary number of turns, open the valve four or five
times and reseat.
Emergency Operation;
Turn the handwheel of operating nut faster in the desired direction.
Ill.
Inspection and Maintenance
1.
Frequency of inspection should be based on frequency of operation.
Semi annual inspections are minimum recommended. Valves should not be
disassembled unless a breakdown has occurred.
2.
During inspection, the valve should be opened and closed with pressure in the pipeline.
The valve should function freely with no binding or vibration. Count the number of turns
to full closed, this will reveal an obstruction if correct number of turns are not achieved.
See table;
TURNS TO OPEN
14" -
52
16" - 52
18"
-
64
24"
- 76
2
20"
-
64
3.
All gaskets and joints should be checked for leakage and tightness.
4.4.
With the valve closed and pressure against the disc,
a
check for leakage
Is possible by "listening" to the valve for flow. A stethescope will help in this procedure.
5.
OS&
Y valves should have the exposed stem lubricated at each
inspection. Check stuffing box bolts for tightness.
6.
6.
A permanent inspection record should be kept for each valve.
GV O&M continued
RECORDS
1.
Trouble can be anticipated with a good Inspection Program. Such a program can not exist
without good records. Poor records are worse than none.
2.
A printed 5 x 8 record card for each valve and hydrant in the system is most convenient.
a.
Identification of each valve is essential. Setting up a numbering system is one of the first
steps to take. A reasonably simple method is to assign a number to each street
intersection, then identify each valve numerically or alphabetically between intersection
numbers.
For instance; 19-110, would be the number of second valve from street intersection number
9 in going toward street number 10.
b.
Location should be recorded first. Measurements must be made from property lines or
street center lines - not power poles fence lines - or the like.
VALVE RECORD
No. __________ _
Location _______ FT. ___ of ____ Prop. Line of ________ _
And
FT.
of
Prop. Line of _______ _
Size ___ Make
Type
Gearing ____ Bypass ___ _
Opens
Turns to Operate
Depth of Nut ________ _
Remarks
------------------------------
Maintenance & Inspection Record
Date
Work Done
O.K. By
Date
Work Done
O.K.
By
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CLOW VALVE COMPANY
14" & 16" R/W VALVE - NO GEAR
MATERIAL LIST
MODEL 2638
Complies with applicable
requirements of AWWA C515
4
ITEM
DESCRIPTION
MATERIAL
1
BODY
DUCTILE IRON
2
COVER
DUCTILE IRON
3
WEDGE
EPDM RUBBER
4
WEDGE CAP
DELRIN
5
ORING
EPDM RUBBER
6
STEM
STAINLESS STEEL
7
STEM NUT
COPPER ALLOY
8
ORING
EPDM RUBBER
9
HEX HEAD BOLT
STAINLESS STEEL
10
HEX NUT
STAINLESS STEEL
11
EXTENSION
DUCTILE IRON
12
ORING
EPDM RUBBER
13
HEX HEAD BOLT
STAINLESS STEEL
14
FOLLOWER PLATE
DUCTILE IRON
15
ORING
EPDM RUBBER
16
HEX BOLT
STAINLESS STEEL
17
HEX NUT
STAINLESS STEEL
18
KEY
STEEL
19
OP NUT
GRAY IRON
20
BOLT
STAINLESS STEEL
21
WASHER
STAINLESS STEEL
22
PIPE PLUG
STAINLESS STEEL
23
THRUST WASHER
DELRIN
***
***
***
***
RECOMMENDED SPARE PARTS
***
***
RECOMMENDED SPARE PARTS
CLOW VALVE COMPANY
18" & 20" RW VALVE - NO GEAR
REQUIREMENTS OF AWWA C515
MODEL 2638
MATERIAL LIST
COMPLIES WITH APPLICABLE
9
21
2
12
10
17
13
15
16
20
1
22
11
19
3
4
5
6
7
8
18
14
23
5
ITEM NO.
DESCRIPTION
MATERIAL
ITEM NO. DESCRIPTION
MATERIAL
1
BOLT
STEEL
13
THRUST WASHER
DELRIN
2
WASHER
STAINLESS STEEL
14
PIPE PLUG
STAINLESS STEEL
3
OP NUT
GRAY IRON
15
TRACK
STAINLESS STEEL
4
FOLLOWER PLATE
DUCTILE IRON
16
ROLLER
COPPER ALLOY
5
HEX HEAD BOLT
STAINLESS STEEL
17
PIN
STAINLESS STEEL
6
COVER
DUCTILE IRON
18
SCRAPER
COPPER ALLOY
7
BODY
DUCTILE IRON
19
KEY
STEEL
8
HEX HEAD BOLT
STAINLESS STEEL
20
ORING
EPDM RUBBER
9
HEX NUT
STAINLESS STEEL
21
STEM
STAINLESS STEEL
10
ORING
EPDM RUBBER
22
ORING
EPDM RUBBER
11
EXTENSION
DUCTILE IRON
23
STEM NUT
COPPER ALLOY
12
ORING
EPDM RUBBER
24
WEDGE
DUCTILE IRON/EPDM RUBBER
***
RECOMMENDED SPARE PARTS
***
***
***
***
RECOMMENDED SPARE PARTS
***
CLOW VALVE COMPANY
MODEL 2638
REQUIREMENTS OF AWWA C515
24" RW RTS - NO GEAR
MATERIAL LIST
COMPLIES WITH APPLICABLE
10
12
1
2
3
4
5
6
7
8
9
22
23
21
11
13
14
15
16
17
18
19
20
24
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RW GV O&M Continued
Dis-assembly Instructions 14" & 16" No Gear Valve
Ref; 14" & 16" RW Valve Material List {page 4)
1. Remove (1)bolt, (2)flat washer, & (3)op nut.
2.
Remove (4)bolts, nuts from (5)follower plate.
3.
Remove (5)follower plate.
4.
Remove (10)stem by turning the stem in the opposite direction of opening
the valve.
5.
Remove (11)bolts, nuts & (11
A
)flat washer from (12)Cover
.
6.
Lift (12)cover off.
7.
Grasp (14)stem nut and lift out (15)wedge.
Note; Threading stem
back into stem nut may make removal of wedge easier.
8.
Reassemble in reverse order replaciny (13)cover o-ring, (7)follower plate
o-ring, & (6)stem o-rings if necessary.
Dis-assembly Instructions 18" & 20" No Gear Valve
Ref; 18" & 20" RW Valve Material List {page 5)
1.
Remove (20)bolt, (21)flat washer, & (19)op nut.
2.
Remove (18)key & retain.
3.
Remove (16)bolts, (17)nuts from (14)follower plate.
4.
Remove (14)follower plate.
5.
Remove (13)bolts, nuts from (11)extension.
6.
Remove (11)extension.
7.
Remove (6)stem by turning the stem in the opposite direction of opening
the valve.
8.
Remove (9)bolts, (10)nuts from (2)Cover.
9.
Lift (2)cover off.
10.
Grasp (7)stem nut and lift out (3)wedge.
NOTE; Threading stem
back into stem nut may make removal of wedge easier.
11.
Reassemble in reverse order replacing (5)cover a-ring, (12)extension
o-ring, (15)follower plate o-ring, & (8)stem o-rings if necessary.
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RW GV O&M Continued
Dis-assembly Instructions 24" No Gear Valve
Ref; 24" RW Valve Material List {page 6)
1.
Remove (1)bolt
,
(2)flat washer
,
& (3)op nut.
2.
Remove (19)key & retain.
3.
Remove bolts & nuts from (4)follower plate.
4.
Remove (4)follower plate.
5.
Remove (5)bolts
,
nuts from (11)extension.
6.
Remove (11)extension.
7.
Remove (21)stem by turning the stem in the opposite direction of opening the
valve.
8.
Remove (8)bolts
,
(9)nuts from (6)Cover.
9.
Lift (6)cover off.
10.
Grasp (23)stem nut and lift out (24)wedge.
NOTE; Threading stem back into
stem nut may make removal of wedge easier.
11.
Reassemble in reverse order replacing (22)cover o-ring
,
(12)extension o-ring
,
(10)follower plate o-ring
,
& (20)stem o-rings if necessary.
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Possible Malfunction
Joint Leakage
Seat Leakage
Leak Past Stem
Troubleshooting
RWGV'S
Symptoms - Causes
Bolt Tension Relaxing
Foreign material caught in seat
Seats Dirty/Carroded
Seats Damaged
Bolts loose
(NRS) Orings worn/damaged
(OS& Y) Packing worn/damaged
Clow RW
G
V O&M Cont.
Corrective Action
Tighten Bolts
Operate valve to flush
Out debris.
Flush or dis-assemble
&
clean.
Inspect-repair or
Replace
Tighten Bolts
Inspect/replace
Inspect/replace
Inspection for the above should be done semi/annually at the minimum.
There are no lubrication requirements other than/
OS& Y valves should have the exposed stem **lubricated at each inspection.
** Food grade grease similar to Mystic FG2
For Parts and Service Contact mfg's rep:
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