Honeywell V5055A-E User manual

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1 60-2307—10
V5055A-E
IndustrialGasValves
TheV5055GasValvesareusedwiththeV4055,
V4062, and V9055 Fluid Power Actuators to con-
trolgasflowtocommercialandindustrialburners.
■Usedwithnaturalorliquefiedpetroleum(LP)gases.
■V5055 normally closed valves are rated for final
shutoff service (safety shutoff).
■V5055A,C,D,E Valves are for On-Off service.
■V5055B Valve has a characterized guide and in
combination with the V4055, V4062, and V9055
Fluid Power Actuators, provides slow-opening, hi-
lo-off, and modulating functions respectively.
■V5055C,E Valves have a double seal and are used
with V4055D,E Actuators to provide proof-of-clo-
sure switch and valve seal overtravelinterlock.
■V5055D,EValvesareforhighpressureapplications
(see Table 1).
■Seven valve sizes from 3/4 to 3 inches have NPT
threaded connections. Models are available with
BSP-PL threads. V5055A,B,C Valves areavailable
in a 4 inch size and have flange connections.
■Most models have 1/4 inch upstream and down-
stream top and plug. BSP-PL thread models have
1/4 inch upstreamtap andplug.
■Valve body rating of 75 psi (517.1kPa).
■Yellow SHUT indicator attached to the valve stem
provides an indication of the valve closedposition.
■Unpainted, die-cast aluminum body.
CONTENTS
Specifications..................................................2
Ordering Information.....................................2
Installation......................................................6
Operation and Checkout.................................8
Service Information........................................9
F. P. • Rev.
11-94 • ©Honeywell Inc. 1994 • Form Number 60-2307—10

V5055A-E
60-2307—10
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SPECIFICATIONS • ORDERING INFORMATION
Specifications
MODELS:
V5055A Industrial Gas Valve for On-Off service.
V5055B Industrial Gas Valve with characterized guide for
slow opening, HI-LO-OFF, or modulating service. V5055C:
Same as V5055A but incorporates a double seal. Used with
the V4055D Actuator to a provide proof-of-closure switch
and a valve seal overtravel
interlock.
V5055D: Same as V5055A but for high pressure appli-
cations.
V5055E: Same as V5055C but for high pressure appli-
cations.
TYPE OF GAS: Natural or liquefied petroleum (LP) only. PIPE
SIZE: 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, and 4 in. (only
V5055A,B,C available in 4 in. size).
PIPE THREADS: NPT or BSP-PL Threads (equivalent to ISO
R7 and DIN 2999). Available on inlet and outlet of 3/4 to 3
inchvalves.Fourinchvalveshaveflangeconnec- tions.
PRESSURE RATINGS: See Table 1. VALVE
BODY RATING: 75 psi (517.1kPa).
VALVE CAPACITIES: A.G.A. ratings at 1 in. (0.25 kPa)
pressure drop; based on gas with specific gravity of 0.64.
TABLE 1—PRESSURE RATINGS OF VALVE-ACTUATOR COMBINATIONS.
Valve
Actuator
V4055A,Dc
V4055B,Ec
V4062,V9055c
psi
kPa
psi
kPa
psi
kPa
psi
kPa
psi
kPa
psi
kPa
V5055A,C
3/4 to 3 in.
5
34.5
15
103.4
15
103.4
15
103.4
5
34.5
14
103.4
V5055A,C
4 in.
3
20.7
15
103.4
5
34.5
15
103.4
3
20.7
15
103.4
V4055B
3/4 to 3 in.
5
34.5
15
103.4
15
103.4
15
103.4
5
34.5
15
103.4
V5055B
4 in.
3
20.7
15
103.4
5
34.5
15
103.4
3
20.7
15
103.4
V5055D,E
3/4, 1, 1-1/4, 1-1/2 in.
5
34.5
75
517.1
25
172.4
75
517.1
5
34.5
75
517.1
V5055D,E
2, 2-1/2, 3 in.
5
34.5
45
310.3
15
103.4
45
310.3
5
34.5
45
310.3
a Maximum operating pressure differential.
b Maximum close-off pressure without seal leakage. This is the maximum allowable pressure drop to which a valve may be
subjected while fully closed, and is independent of the valve body rating.
c UseaV4055D,V4055E,V4062D,orV9055D(withproof-of-closureswitch)withaV5055CorE(withdoubleseal)forvalve
seal overtravel interlock.
OrderingInformation
WhenpurchasingreplacementandmodernizationproductsfromyourTRADELINE®wholesaleror distributor,refertothe TRADELINE® Catalog or price
sheets for complete ordering number, orspecify—
1. Order number
2. Pipe size.
3. NPT or parallel BSP threads (except for 4 in. models with flanges).
4. Optional additional tapping and plug—1/8 in downstream and/or 1/2 in. upstream.
5. Replacement parts, if desired.
If you haveadditionalquestions, need furtherinformation,or wouldliketo comment on ourproductsor services,pleasewrite or phone:
1. Your local Home and Building Control Sales Office (please check the white pages of your phonedirectory).
2. Home and Building Control Customer Logistics
Honeywell Inc.
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 [phone]
In Canada—Honeywell Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P2V9. International Sales and Service Offices
in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan,
United Kingdom, U.S.A.

3
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I.A.S.a Rated Capacity
Valve Size (in.)
cf/h
cu m/hr
3/4
665
18.8
1
960
27.2
1-1/4
1406
39.8
1-1/2
1717
48.6
2
3620
102.5
2-1/2
4250
120.3
3
5230
148.1
4 (V5055A)
10200
288.8
4 (V5055B,C)
9180
259.9
a AjointventureofCGAApprovalsInc.andAGALabora-
tories.
UPSTREAM TAPPING AND PLUG: 1 /4 in. NPT or BSP-
PL is standard.
DOWNSTREAM TAPPING AND PLUG:
1/4 in. NPT on most domestic models.
1/8 in. NPT on V5055C1182.
AMBIENT OPERATING TEMPERATURE RATING:
-40F to 150F (-40C to 66C); -40F to 125F (-
40C to 52C) when used with V9055.
MATERIAL: Die-cast aluminum.
MOUNTING: Mounts directly in the gas supply line.
DIMENSIONS: See Fig. 2 and 3.
WEIGHT:
3/4, 1, 1-1/4, 1-1/2, in. valve: 4 lb. (1.8 kg).
2 in. valve: 8 lb. (3.6 kg).
2-1/2, 3 in. valve: 11 lb. (5.0 kg).
4 in. valve: 28 lb. (12.7 kg).
Fig. 1—Flow curves for V5055 Valves.
100.0 1
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1
100.0
(25) 9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
10.0 1
(2.5) 9
8
7
6
5
4
3
2
1.0 1
(0.25) .9
.8
.7
.6
.5
.4
.3
.2
.1
1.0
9
8
7
6
5
4
3
2
1.0
.9
.8
.7
.6
.5
.4
.3
.2
.1
CAPACITY, IN CUBIC FEET PER HOUR (cf/h) FOR GAS WITH SPECIFIC GRAVITY OF 0.64 [1 cf/h = 0.0283 cu m/hr] M9542
PRESSURE DROP, INCHES WC
[1 in. wc = 0.25 kPa]
100
1000
10,000
100,000
(2.8)
(28)
(283)
(2830)

60-2307—10
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REPLACEMENT PARTS:
Replacement Seal Assembly: Includes valve seal, bonnet
seal, and tube of lubricant.
133393A: for 3/4, 1, 1-1/4, and 1-1/2 in. valves
133392A: for 2, 2-1/2, and 3 in. valves.
137253A: for 4 in. valves.
Replacement Bonnet Assembly: Includes completebon-
net assembly, plus the required replacement sealassem-
bly.
APPROVALS:ThefollowingcombinationsofV5055Valves
(3/4 through 4 in.) and V4055, V4062 and V9055 Fluid
Power Actuators are approved by theseagencies:
Underwriters Laboratories Inc. Listed: (File No. MH1639,
Guide No. YIOZ):
V4055A,B,D,E/V5055A,B,C,D,E
V4062/V5055A,B,C,E
V9055/V5055A,B,C,E
Fig. 2—Approximate dimensions of the 3/4 through 3 in. V5055 Valves with valve actuator in in. (mm).
3 (171.5)
4
3 23 (94.5)
32
27 (21.4)
32
KNOCKOUT
FOR1/2 INCH
CONDUIT (4)
19
32
(32.5)
A 1
C
B
E
1/4 INCH NPT
DOWNSTREAM
TAP AND PLUG D
1/4 INCH NPT UPSTREAM
TAP AND PLUG
ALLOW 2 IN. (51 mm) CLEARANCE FOR ACTUATOR REMOVAL.
VALVE
SIZE
INCH
DIM A
DIM B
DIM C
DIM D
DIM E
DIM F
OCTAGON
IN.
MM
IN.
MM
IN.
MM
IN.
MM
IN.
MM
IN.
MM
IN.
MM
3/4
11-1/8
282.6
2-3/4
69.9
8-3/16
208.0
5-3/4
146.1
2-1/4
57.2
4-13/16
122.2
2-13/16
71.4
1
11-1/8
282.6
2-3/4
69.9
8-3/16
208.0
5-3/4
146.1
2-1/4
57.2
4-13/16
122.2
2-13/16
71.4
1-1/4
11-1/8
282.6
2-3/4
69.9
8-3/16
208.0
5-3/4
146.1
2-1/4
57.2
4-13/16
122.2
2-13/16
71.4
1-1/2
11-1/8
282.6
2-3/4
69.9
8-3/16
208.0
5-3/4
146.1
2-1/4
57.2
4-13/16
122.2
2-13/16
71.4
2
11-1/4
285.8
2-7/8
73.0
8-5/16
211.1
8-3/8
212.7
2-3/4
69.9
7-19/32
192.9
3-1/2
88.9
2-1/2
11-3/4
298.5
3-3/8
85.7
8-13/16
223.8
9-1/4
235.0
2-3/4
69.9
7-19/32
192.9
4-1/2
114.3
3
11-3/4
298.5
3-3/8
85.7
8-13/16
223.8
9-1/4
235.0
2-3/4
69.9
7-19/32
192.9
4-1/2
114.3
M9585
5(127)
OCTAGON
F
1
6
Valve
Model
Valve
Size (in.)
Replacement
Bonnet
Assembly
V5055A (On-Off)
3/4, 1, 1-1/4,
1-1/2
133398AA
2, 2-1/2, 3
133417AA
4
136911AA
V5055B
(Characterized guide)
3/4, 1, 1-1/4,
1-1/2
133398BA
2, 2-1/2, 3
133417BA
4
136911BA
V5055C (Valve-
closed indicator)
4
136911CA
V5055D (High
pressure On-Off)
3/4, 1, 1-1/4,
1-1/2
136308AA
2, 2-1/2, 3
136307AA

5
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2
Industrial Risk Insurers (Formerly F.L.A.) Acceptable:
V4055A,B,D,E/V5055A,B,C,D,E
V4062/V5055A,B,C,E
V9055/V5055A,B,C,E
FactoryMutualApproved(ReportNo.20698,20835,21172,
and 24061).
American Gas Association (IAS) Design Certified (Report
No. 21 -1 C):
V4055A/V4055A,B V4055E/V5055E
V4055B/V5055D V4062/V5055B,C
V4055D/V5055C V9055/V5055B,C
NOTE:TheIASdoesnotcertifymodelsequippedwithBSP
threads.
Canadian Gas Approvals Inc. (IAS) Certified (Report No.
1029-SSV-4098, 60 Hz actuator models only):
V4055A,B,D,E/V5055A,B,C,D,E
British Gas Corporation and Dutch Gas Institute Approved:
V4055 or V4062 with V5055; A1145, -A1152, A1160,
-A1178, -B1168, -B1184, B1192, -B1200, -B1218.
Australian Gas Association Approved: V5055; -B1267,
-B1275, and -B1291.
DIN-DVGW Approved (Germany): V5055, -A1145,
-A1152, -A1160, -A1178, -B1168, -B1184, -B1192,
-B1200, and -B1218.
GAS VALVE SIZING
1. Check the burner nameplate for (a) the type of gas
used, and (b) the gas flow capacity. The capacity will be
listedinBtu/h(Btusperhour)orincf/h(cubicfootperhour).
2. Call the gas utility for information on (a) the specific
gravity(spgr) and (b) Btu per cubicfoot(Btu/cuft)fortype
of gasused.
3. Find the capacity in cf/h. If the capacity is listed in
Btu/h, convert to cfh by the following formula:
V4062/V5055B
V9055/V5055B Capacity in cf/h = Btu/h (from burner nameplate)
Btu/cu ft (from gas utility)
Fig. 3—Approximate dimensions of the 4 in. V5055 Valves with valve actuator in in. (mm).
3 (171.5)
4
3 23 (94.5)
32
27 (21.4)
32
KNOCKOUT
FOR1/2 INCH
CONDUIT (4)
5 (127)
19 (33)
32
1
14 5
32
(360)
7
32
(285)
3 (19)
4
25
32
(147)
DIAMETER
(16)
5
32
(233)
12 1 (318)
2
45°(16)
1/4 - 18 NPT
UPSTREAM
PLUG (2)
4 (102)
DIAMETER
7 1 (191)
2
DIAMETER
ALLOW 2 IN. (51 mm) CLEARANCE ABOVE V4055 SO IT MAY BE REMOVED FROM VALVE.
DIMENSIONS ON DIN-APPROVED VALVES: 1/4 - 19 BSP.PL UPSTREAM PLUG (2),
.71 IN (18 mm) DIAMETER BOLT HOLE (16), 7.087 IN (180 mm) DIAMETER BOLT CIRCLE.
M9584
1
2
6
11
5
9

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SPECIFICATIONS • INSTALLATION
4. For gases with specific gravities other than 0.64,
multiply the burner cfh by the proper conversion factor:
5. Use the corrected capacity in cf/h when determining
the gas valve size in Fig.1.
6. Determine the maximum pressure drop across the
valve and draw a horizontal line at this pressure inFig. 1.
7. Draw a vertical line in Fig. 1 at the capacity (cf/h)
previouslydetermined.Use the corrected capacityfora gas
with a specific gravity other than0.64.
8. Use the valve sizeat the intersectionof the horizontal
and vertical lines. If the intersection is between valve sizes,
use the next higher size to the right.
TO SIZE TWO IDENTICAL VALVES PIPED IN
SERIES
1. Find the cf/h for the type of gas used.
2. Consider both valves as one unit. Determine the total
maximum pressure drop across the unit.
3. Findthepressuredropacrossthefirstvalvebyassum-
ing it to be 45 percent of the total pressure drop.
4. Find the valve size from Fig.1.
5. The second valve will be the same size as the first
valve.
Installation
IMPORTANT: The V5055 Valve is designed to provide
control of gaseous fuel (natural and LP gas) flow in
applications in which there is minimal exposure to
water.V5055Valvesusedinmaritime,beverage,food
processing, outdoor and other installations in which
occasional exposure to water is experienced may be
subject to valve stem and spring corrosion. The pres-
ence of corrosion decreases the operating life of the
valve. V5055 Valves used in such installations should
be inspected at least annually and should have the
valve bonnets replaced if corrosion isnoted.
A V4055ValveActuator with a NEMA4 rating isalso
recommended for such installations. The water-tight
designof the NEMA 4 rated V4055 Actuator prevents
water from entering the V4055 valve stem and spring
chamber through the actuator. Under certain condi-
tions, some water may be retained by the external
upperportionof the valve body. The retained wateris
effectively excluded from the valve stem and spring
chamberby afunctionalsealthatisincorporatedinto
the NEMA 4 ratedactuator.
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced, flame safe-
guard control technician.
4. After installation is complete, check out product
operations as provided in these instructions.
CAUTION
1. Turnoff gas supplybefore starting installation.
2. Disconnect power supply for valve actuator
before beginning installation to prevent electri-
cal shock and equipmentdamage.
3. Besurethevalveisinstalledsothearrowonthe
valve points in the direction of gas flow. (Gas
pressure helps to close thevalve.)
LOCATION
Installthevalveinthegassupplylinedownstreamfrom
the pressure regulator. The valve and actuator may be
mountedinanypositionthatallowssufficientclearancefor
installation and for repair or replacement.
1. The valve position indicators should beeasily visible
with the valve and actuator in the final position.
2. Thefinalpositionofthevalveandactuatormustallow
for damper linkage, ifused.
IMPORTANT: Allow room for turning the valve body
(actuator not attached) onto the gas piping. Swing
dimensions,measuredfromthecenterofthepipeare:
3/4 through 1-1/2 in. valves: 4 in. (101.6 mm).
2 through 3 in. valves: 5 in. (127.0 mm).
4 in. valves: 7 in. (177.8 mm).
MOUNTING (Figs. 4 through 6)
WARNING
If flow is not in the direction of the arrow on the
valve body, the valve may not shut off.
Type of Gas
sp gr (average)
Multiply cf/h by
LP—Propane
1.53
0.647
LP—Butane
1.98
0.569

7
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1. Use new, properly reamed, pipe, free fromchips.
2. Donot threadpipetoo far(Fig.4). Valvedistortionor
malfunction may result from excess pipe in thevalve.
Fig. 4—Preparing the pipes.
8. Use two threaded companion flanges, two gaskets
(included with valve), and 16 bolts (with washers and nuts)
for mountinga 4 in.-V5055 Valve. Mount a threaded flange
andgasketoneachend ofthevalveasshowninFig.6.Then
screw the pipes into the threaded flanges. Apply dopespar-
ingly, and use wrenchesand vises properlyas showninFig.
4 and5.
9. Make sure the power supply is disconnected from the
valve actuator. Then mount the actuator on the valve body
TWO CLEAN
THREADS,
MODERATE
AMOUNT
OF DOPE
1
EXCESS DOPE MAY BLOCK
DISK OFF
VALVE
SEAT
LOOSE
and complete the electrical and linkage connections follow-
ing the instructions packed with the actuator.
CORRECT:
NORMAL
FULL
THREAD
CORRECT:
NORMAL
FULL
THREAD
CHIPS
REAM PIPE,
BLOW OUT
CHIPS (TO AVOID
LODGING ON SEAT)
INCORRECT:
TOO LONG,
DISTORTS
VALVE SEAT
INCORRECT:
TOO LONG,
DISTORTS
VALVE SEAT
Fig. 5—Installing a 3/4 through 3 in. V5055
Valve.
USE PIPE DOPE RESISTANT TO ACTION OF LP GAS.
M9571
3. Removetheprotectivecapsfromtheendsofthevalve.
Do not attach the valve actuator until the valve body instal-
lation is complete.
4. Applygoodqualitypipedoperesistantto actionofLP
gas, putting a moderate amount on the male threads only.
Use dope sparingly; if pipe dope lodges on the valve seat, it
will prevent proper closure.
5. Install valve with the gas flow in the direction indi-
cated by the arrowon the casting.
6. Applyaparalleljawwrenchonlytotheflatnexttothe
pipe being inserted (Fig. 5). A wrench applied to the valve
bodyitself,ortotheendfarthestfromthepipebeinginserted,
maydistortthecasting,causingamalfunction.Donotusethe
valve for a lever.
7. Be sure the gas flow is in the same direction as the
arrowon the bottom of the valve body.
CORRECT:
VISE GRIPS END
NEXT TO PIPE
BEING INSERTED
CORRECT:
WRENCH CORRECTLY
APPLIED NEXT
TO PIPE BEING
INSERTED
INCORRECT:
WRENCH HERE
STRAINS
VALVE BODY
M9580
1

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INSTALLATION • OPERATION AND CHECKOUT
Fig. 6—Installing a 4 in. V5055 Valve.
Operationand Checkout
OPERATION
A V5055 Industrial Gas Valve is operated by a V4055,
V4062, or V9055 Fluid Power Gas Valve Actuator. The
valve opens when the actuator is energized, and closes
when power is removed. When closed, the valve seals off
against therated close-off pressure with no power applied.
For further information, refer to the Instructions for the
actuator.
CHECKOUT
WARNING
Donot allowfuelto accumulateinthecombustion
chamber.Iffuelisallowedtoenterthechamberfor
longer than a few seconds without igniting, an
explosive mixture could result.
CAUTION
1. Do not put the system into service until you
have satisfactorily completed the following
Valve Leak Test, all applicable tests described
in the Checkout section of the Instructions for
the flame safeguard control, and any other tests
required by the burnermanufacturer.
2. All tests must be performed by a trained, expe-
rienced flame safeguard control technician.
3. Close all manual fuel shutoff valves as soonas
trouble occurs.
Aftertheinstallationiscomplete,cyclethevalveseveral
times with the manual fuel shutoff cock closed. Make sure
the valve and actuator function properly. Also perform the
Valve Leak Test that follows before putting the valve into
service.
4IN.VALVE
NUT AND WASHER
(NOT INCLUDED)
GASKET
(2 INCLUDED WITH VALVE)
THREADED COMPANION
FLANGE (2 - NOT INCLUDED)
5/8X3IN.[76]BOLT
(16-NOTINCLUDED)
4IN.PIPE
M9581

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OPERATION AND CHECKOUT • SERVICE INFORMATION
VALVE LEAK TEST (Fig. 7)
This is a test for checking the closure tightness of a gas
safety shutoff valve. It should be performed by qualified
personnel during the initial startup of a burner system, or
wheneverthevalveorvalvebonnetisreplaced(seeService
Information section). It is recommended that this test also
be included in the scheduled inspection and maintenance
procedures. For a periodic inspection test, follow steps 1,
3, 4, 5, 8, 9, 10, 12, 13, 16, and 17.
1. De-energize the control system to assure that thereis
no power to the safety shutoff valve (C) shown in Fig. 7.
2. Close the upstream manual gas cock(A).
3. Make sure the manual test petcock(F) is closed in the
leak test tap assembly(D).
4. Remove the leak test tap plug and connect the test
apparatus to the Leak Tap(D).
5. Close the downstream manual gas cock(E).
6. Open the upstream manual gas cock(A).
7. Run the safety shutoff valve (C) to its fully open
position (through the safety system); then immediately de-
energize the system to close thevalve.
8. Immersea1/4in.tubevertically1/2in. (12.7mm)into
NOTE: For international leak test requirements, contact the
office of the appropriate approval agency.
AFTER THE TEST:
11. Close the upstream manual gas cock(A).
12. Close the test petcock (F), remove the testapparatus,
and replace the leak test tapplug (D).
13. Openthe upstreammanualgas cock(A) and energize
the safety shutoff valve(C).
14. Testwithsoapbubblestoassurethatthereisnoleakat
the test tap(D).
15. De-energize the safety shutoff valve(C).
16. Open the downstream manual gas cock(E).
17. Restore the system to normal operation. If two safety
shutoffvalvesare utilized,each550Vvalveisto bechecked
for tightness ofclosure.
Fig. 7—Valve Leak Test.
a jar of water.
9. Slowly open the test petcock(F).
10. When the rate of bubbles coming through the water
stabilizes, count the number of bubbles appearing during a
GAS
SUPPLY
A B C D
LEAK
TEST
TAP
E MANUAL
GAS COCK
BURNER
ten-second period. Each bubble appearing during a ten-
second period represents a flow rate of approximately
MANUAL
GAS COCK PRV SSOV
F
0.001 cfh.
TomeetU.S.requirements,leakagemustnotexceedthe
followingvalues:
1/4 in. FLEXIBLE
TUBING
1/4 in. ALUMINUM
OR COPPER PILOT
TUBING
TEST
PETCOCK 1
JAR OR GLASS
WITH WATER
a Based on air at standard conditions, test pressures pro-
vided by ANSI Z21.21, Section 2.4.2 and a maximum of
235 cc/hr per inch of seal-off diameter. Seal-off diameter
is not to be confused with pipe size.
1 [12.7]
2
MAY ALSO BE A PERMANENT PETCOCK.
CUT AT
45 DEGREE
ANGLE
M9547
CAUTION
1. Before servicing, turn off the gas supply and dis-
connectallelectricalpowerto thevalveactuator.
2. Only qualified service technicians should at-
tempt to service or repair flame safeguardcon-
trols and burnersystems.
3. Donot disassemblethevalvebonnetassembly;
the valve seat is notreplaceable.
4. Failureto properlypositionandseatthesealsin
the valve body may result in a hazardous gas
leak.
Service Information
SCHEDULED INSPECTION AND MAINTENANCE
Setup and follow a schedule for periodic inspection and
maintenance, including the burner, all other controls, and
thevalve(s).Itisrecommended thattheValveLeakTestin
the Checkout section beincluded in this schedule. Refer to
the Instructions for the primary safety control for more
information.
VALVE BONNET REPLACEMENT
The entire valve bonnet may be replaced without re-
moving the valve body from the gas line. Do not disas-
semble the valve bonnet assembly; the valve seat is not
replaceable.
1
V5055
Pipe Size
(in.)
Allowable
Leakage
(cc/hr)a
Number of
bubbles per
10 sec
3/4, 1, 1-1/4, 1-1/2
458
16
2, 2-1/2, 3
752
26
4
1003
35

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SERVICE INFORMATION
For part numbers, refer to Replacement Parts in the
Specificationssection.Completeinstructionsforreplacing
the bonnet assembly are included with the replacement
part.
REPLACEMENT OF SEALS (Fig. 8 or 9)
When removing the bonnet to inspect and clean the
valve, install new seals (see Replacement Parts in Specifi-
cations section). Coat the new seals with the grease pro-
vided, and position them in the valve body as shown in
Fig. 8 or9.
Failure to properly position and seat the seals in the
valve body may result in a hazardous gas leak.
Afterthenewbonnetassemblyisinstalled,orthebonnet
isremovedforanyreason,checkforgasleakagearoundthe
bonnet seal. Turn on the gas at the manual valve. Paint the
seal area with a rich soap and water solution. Bubbles
indicateagasleak.Ifaleakisdetected,checktoseethatthe
bonnet screws are tight. If necessary, turn off the gas again
and remove the bonnet to be sure the seals are properly
seated.
Fig. 8—Proper positions of valve and bonnet
seals in 3/4 through 3 in. valves.
Fig. 9—Proper positions of valve and bonnet
seals in 4 in. valve.
M9579
LARGE SEAL
SMALL SEAL
BONNET SEAL
VALVE SEAL
M9578

11
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