Nibco LD-7000 Series Guide

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
CAUTION: Only qualified personnel should undertake the procedures outlined in this document. NIBCO
INC., its agents, representatives and employees assumes no liability for the use of these procedures. These
procedures are offered as suggestions only.
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1
NIBCO INC.
WORLD HEADQUARTERS
1516 MIDDLEBURY ST.
ELKHART, IN 46516-4740
USA
PHONE: [phone]
FAX: [phone]
WEB: www.nibco.com
Review Date: NA
Original Date: 3/23/2022
USA ONLY
Installation and Maintenance Guidelines for
NIBCO®Flanged Butterfly Valves with Rubber Seats
Figure Numbers
LD-7000 Series
LD-3000 Series
Pressure Rating
232 psi / 16 Bar CWP - LD-7000 Series
250 psi / 17.2 Bar CWP – LD-3000 Series
Valve Size Range
14” – 48” - LD-7000 Series
(DN 350 - DN 1200)
14” – 24” - LD-3000 Series
(DN 350 - DN 600)
For any technical inquiries please call NIBCO Technical Services

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I. SHIPMENT & STORAGE
NIBCO butterfly valves are packaged depending on valve size and quantity shipped. Smaller size
butterfly valves are bulk crated, larger size butterfly valves are crated individually. The butterfly
valve faces are covered with hardboard or plywood to protect flange sealing surfaces.
The disc is shipped in the nearly closed position to protect the sealing edge and prevent the liner
from taking a temporary set. The stem bushings and disc edge have been coated with a factory-
applied lubricant to prolong storage and service life.
Valves may be shipped or stored in any position. Storage should be limited to 10 years indoors with
a temperature range of 40º F to 90º F (4°C to 32°C).
II. BUTTERFLY VALVE INSTALLATION GUIDELINES
Review valve pressure rating on nameplate and system pressure limits to ensure valve is rated for
the intended service. Do not exceed the pressure rating of the valve.
NIBCO rubber-lined butterfly valves, depending on size and pressure rating, are designed to mate
with Class 125/150 flange patterns in conformance to ASME B16.1, ASME B16.5, or ASME B16.47
Class 150 (Series A) flanges. Cast iron and steel flat-face flanges can be used with all NIBCO
butterfly valves.
While flange standards specify flange OD, thickness, bolt size, bolt-circle diameter, and number of
bolts, they may not specify flange opening ID. Care must be used when selecting mating
components for use with NIBCO flange style butterfly valves. The internal diameter of flanges,
fittings, and pipe must be compatible with the butterfly valve for proper seal-face integrity
and disc operation.
When in the open position, the disc extends outward from the valve body. The internal diameter of
connecting components must be large enough to allow clearance for the disc to fully open. The
disc clearances specified in TABLE 1 (below) are in accordance with MSS Standard Practice SP-
67 Butterfly Valves, Table A1.
NIBCO 14” thru 48” size butterfly valves have an integral rubber face that seals to the attaching
flange; therefore, a separate gasket is not necessary and should never be used.
The flange inside diameter must not be too large or it will not mate properly with this integral seal.
See TABLE 1 (below) for minimum and maximum inside diameters of connecting piping/flanges to
assure proper seal-face integrity and full operation of NIBCO butterfly valves. Verify the inside
diameter and clearance dimensions of all components connecting directly to a butterfly valve.
VALVE
SIZE
MINIMUMPIPE
/FLANGEIDFOR
DISCCLEARANCE
MAXIMUMPIPE
/FLANGEIDFOR
PROPERSEAL
VALVE
SIZE
MINIMUMPIPE
/FLANGEIDFOR
DISCCLEARANCE
MAXIMUMPIPE
/FLANGEIDFOR
PROPERSEAL
14"12.88”15.50”30"29.08”31.28”
350mm327mm394mm750mm739mm795mm
16"15.06”17.90”36"33.60”36.77”
400mm383mm455mm900mm853mm934mm
18"17.02”19.67”42"39.87”44.96”
450mm432mm500mm1050mm1013mm1142mm
20"18.96”21.05”48"44.86”21.57”
500mm482mm535mm1200mm1139mm548mm
24"23.04”25.57” 
600mm585mm649mm  

TABLE 1

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VALVE INSTALLATION GUIDELINES CONTINUED
Butterfly valves should be installed a minimum of six (6) pipe diameters from other line components
and changes in direction in both the upstream and downstream piping. This assures disc clearance
when opening the valve and reduces internal stress on disc by reducing flow turbulence. While not
always practical, it is important to design in as much straight distance on either side of the butterfly
valve as possible.
NIBCO butterfly valves are bi-directional and may be installed with flow in either direction. These
valves can be installed in any horizontal or vertical position. If a choice of stem positions exists, the
valve should be installed with the stem in the horizontal position; this will minimize seat wear by
distributing the stem and disc weight evenly. Also, if the media is abrasive, the horizontal stem
position is highly preferred, which will allow the disc to act as a “scoop” to sweep the line of the
media when operated.
When using a valve with gear operator attached, it may be desirable to have the hand wheel
positioned to allow easy access, or for use of an optional sprocket rim (chain wheel) for remote
operation. It is the responsibility of the installer to determine if a Retaining Harness is needed when
using a chain wheel. Before valve installation, review how to orient the gear operator hand wheel
position in relation to the valve body and piping system. Pre-planning may save from having to
remove a newly installed valve and reinstalling in another orientation.
Open and close the butterfly valve fully before attempting to install it into a piping system to ensure
the gear operator stops are properly set and the valve is fully functional. If the gear operator is
removed from the valve for any reason, prior to or during installation, the gear operator stops must
be properly reset as per Section IV, on page 5.
III. VALVE INSTALLATION PROCEDURE
Always position the connecting pipe flanges accurately in the line, allowing sufficient space between
the flanges for the valve. Make sure the pipe flange faces are clean of any foreign material such as
scale, metal shavings or welding slag. Valves should be installed with the disc in the closed position
to prevent damage to sealing surfaces. Rubber seated butterfly valves have an integral rubber face
that seals to the attaching flanges, therefore separate gaskets should not be used.
1. Fully close valve and inspect to assure disc is centered equally in the seat. Adjust gear operator
CLOSE stop if necessary, to center disc in seat. See Section IV on page 5.
2. Carefully insert the valve between the pipe flanges. Do not apply any lubricants to the seat faces
as this may damage them.
3. Line up, center & secure the valve between flanges using customer supplied desired bolts as
listed in TABLE 2 on next page. Do not tighten bolts at this time, hand tighten then “snug-up”.
4. Carefully open the valve to assure free unobstructed disc movement. Disc interference may
result when valves are installed in pipelines having smaller than normal inside diameters, such
as heavy wall pipe, plastic-lined pipe, as-cast flanges, or reducing flanges. Interference can also
occur when connecting directly to a swing check or silent check. Suitable corrective measures
must be taken to remove these obstructions, such as taper boring the pipe or installing a spacer
or spool piece.
5. After proper operation is verified, tighten the bolts to the minimum recommended bolt torques
listed in TABLE 3, next page, using a cross-over pattern as shown in FIGURE 1, next page.
6. A multi-stepped process utilizing the cross-over pattern should be used to draw flanges against
the rubber seat from both sides of the valve at the same rate, ensuring even compression. This
should be followed by 2 sets of chase patterns, alternating from one side of the valve to the
other. Refer to ASME PCC-1 GUIDELINES FOR PRESSURE BOUNDRY BOLTED FLANGE
JOINT ASSEMBLY for bolt tightening methodology.
7. Pressurize piping to valve and inspect for leakage. If leakage is observed, tighten bolts using
cross-over pattern, increasing torque until leak stops.
DO NOT EXCEED MAXIMUM TORQUES LISTED IN TABLE 3 on next page.
8. Recommended torques are made without warranty. Installer must verify proper strength bolts
for application.

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VALVE INSTALLATION PROCEDURE - CONTINUED
RECOMMENDED BOLT LENGTHS
VALVESIZE
TOTALVALVEBODY
WIDTH
ASMEB16.1
CLASS125CASTIRON
FLANGETHICKNESS
ASMEB16.5
CLASS150STEEL
FLANGETHICKNESS
ASMEB16.47(SERIESA)
CLASS150STEEL
MSSSP‐44
FLANGETHICKNESS
RECOMMENDED
BOLTLENGTH
TOTALQUANTITY
CAPSCREWS/BOLTS
(TOMOUNTVALVE
BETWEEN2FLANGES
)

BOLT
THREADSIZE
14”3.011.381.38—2.5241‐8UNC
16”3.381.441.44—3321‐8UNC
18”4.121.561.56—3321‐1/8–7UNC
20”5.141.691.69—3.5401‐1/8–7UNC
24”5.981.881.88—4401‐1/4–7UNC
30”6.572.12——4.25561‐1/4–7UNC
——2.94556
36”8.002.38——5641‐1/2–6UNC
——3.56664
42”9.882.62——5.25721‐1/2–6UNC
——3.816.572
48”10.872.75——5.5881‐1/2–6UNC
——4.25788
TABLE 2
TABLE 3
BOLTGRADEBOLTHEAD
MARKING
LUBRICATEDBOLTSIZENON‐LUBRICATEDBOLTSIZE
1"‐81⅛"‐71¼"‐71½"‐61"‐81⅛"‐71¼"‐71½"‐6
ASTMA307ORTORQUE
FT./LBS.
MINIMUM457010017075100150240
SAEJ429GRADE2MAXIMUM140200300500240350500800
BOLT
TIGHTENING
SEQUENCE
⑩ CIRCLED NUMBERS REPRESENTS BOLT NUMBER
16 BOXED NUMBERS REPRESENTS TIGHTEN SEQUENCE ORDER
FIGURE 1

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IV. GEAR OPERATOR ADJUSTMENT
NOTE: It is best to visually check the valve disc OPEN and CLOSE positions before the valve is
installed in the system piping to assure proper valve operation.
1. Attach gear operator to the top of the valve and securely tighten bolts, or verify bolts are
securely tight if you received a valve with the gear operator already attached.
2. Fully close valve and inspect seat to assure disc is centered equally in seat. If not, CLOSE
stop adjustment is necessary.
IF VALVE DISC DOES NOT FULLY CLOSE
3. Loosen CLOSE stop nut on gear operator one turn by turning counterclockwise or remove
outer set screw. See FIGURE 2, 3, 4, & 5 on next pages.
4. Loosen CLOSE stop set screw 2 turns by turning counterclockwise.
5. Turn handwheel clockwise until valve disc is centered equally in seat.
6. Tighten CLOSE stop set screw by turning clockwise until it stops.
7. Tighten CLOSE stop nut until it is tight or reinstall outer set screw and tighten.
IF VALVE DISC TRAVELS PAST CLOSE POSITION
8. Turn handwheel counterclockwise until disc is centered in seat.
9. Loosen CLOSE stop nut on gear operator one turn by turning counterclockwise or remove
outer set screw.
10. Tighten CLOSE stop set screw, or inner set screw, by turning clockwise until it stops.
11. Tighten CLOSE stop nut until it is tight or install outer set screw and tighten.
12. If the valve is installed in the system piping and cannot be removed, it is possible to adjust
the stops, but is a little more difficult. The only difference is that instead of visually checking
the actual disc in the valve; you must visually check the pointer position. Because the exact
pointer position is more difficult to determine, it may take a couple tries to set the CLOSE
stop. OPEN stop adjustment is not critical; ±5° travel is adequate.
NOTE: The gear operator’s OPEN and CLOSE positions have been set at time of shipping.
These instructions should be used for slight adjustment as needed.
GEAR OPERATOR DIMENSIONS
VALVESIZEAABBCCDDEEFFGGHHJJPIN/KEYWEIGHT
14"4.723.942.132.36.9410.6310.2419.699.84.236”X2.17”58lbs.
350mm1201005460242702605002506X55mm26Kg.
16”,18”20"4.137.282.522.36.9414.9611.4211.819.84.236”X1.57”90lbs.
400,450,500mm1051856460243802903002506X40mm41Kg.
24”5.515.913.312.52.9414.2513.7819.6911.81.236”X2.17”145lbs.
600mm1401508464243623505003006X55mm66Kg.
30",36"6.376.953.464.051.109.747.6617.6813.91.315"X1.57"339lbs.
750,900mm16217788103282481954503548X40mm154Kg.
42",48"13.569.745.895.781.4116.279.3519.6528.45.315"X1.57"924lbs.
1050,1200mm345248150147364142385007248X40mm420Kg.
TABLE 4
See FIGURE 2, FIGURE 3, FIGURE 4, and FIGURE 5 on next pages for drawings

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GEAR OPERATOR FOR 14” SIZE BUTTERFLY VALVES
FIGURE 2
GEAR OPERATOR FOR 16” THRU 24” SIZE BUTTERFLY VALVES
FIGURE 3

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GEAR OPERATOR FOR 30” & 36” SIZE BUTTERFLY VALVES
FIGURE 4
GEAR OPERATOR FOR 42” & 48” SIZE BUTTERFLY VALVES
FIGURE 5
OPEN STOP CLOSE STOP
OPEN STOP CLOSE STOP

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V. VALVE CONSTRUCTION - 14” THRU 24” SIZE BUTTERFLY VALVES
VALVE
SIZEUNITSABCD (KEY)EFGHIJK
14"INCHES1.6870.4721.81.487X.315X1.614.020.475.511.8115.6711.3016.50
350mmmm42.861245.8612X8X401021214046.0398287419
16"INCHES1.9930.6302.15.630X.394X2.755.510.717.762.9916.9713.7418.90
400mmmm50.621654.6216X10X701401819776.0431349480
18"INCHES2.1250.6302.28.630X.394X2.755.510.717.762.9917.8314.4520.67
450mmmm53.981657.9816X10X701401819776.0453367525
20"INCHES2.4940.7092.65.709X.433X3.155.510.717.763.3918.9015.9122.05
500mmmm63.351867.3518X11X801401819786.0480404560
24"INCHES2.7560.7872.93.784X.472X3.1510.000.7110.873.3922.1318.1526.57
600mmmm70.002074.5020X12X802541827686.0562461675

VALVE
SIZEUNITSLMNOPQR QTY
U
THREADSTGEAR MOUNTWEIGHT
14"INCHES13.153.623.9420.9818.7512.87
241"‐8UNC1.18 F10220lbs.
350mmmm334.092100533476.332730100Kg.
16"INCHES15.364.024.3323.5021.2515.08
321"‐8UNC1.26 F14288lbs.
400mmmm390.1102110597539.838332131Kg.
18"INCHES17.374.494.8025.0022.7517.01
321⅛"‐7UNC1.38 F14354lbs.
450mmmm441.1114122635577.943235161Kg.
20"INCHES19.375.005.3127.5225.0018.98
401⅛"‐7UNC1.57 F14471lbs.
500mmmm192.1127135699635.048240214Kg.
24"INCHES23.346.066.3832.0129.5023.03
401¼"‐7UNC1.77 F25929lbs.
600mmmm592.8154162813749.358545422Kg.
TABLE 5
FIGURE 6

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14” THRU 24” SIZE BUTTERFLY VALVES
ITEMQTYDESCRIPTIONMATERIALSPECIFICATIONS
11ENDCAPCOVERDUCTILEIRONASTMA53665‐45‐12
22SCREWSTEEL
31O‐RINGNITRILEASTMD2000
42BUSHINGSHORTBRONZEASTMB584C83600
51O‐RINGNITRILEASTMD2000
61STEMSTAINLESSSTEELASTMA276S42000
STAINLESSSTEELASTMA564S63000
71DISC
DUCTILEIRONA53665‐45‐12NYLON11COATED
ALUMBRZASTMA148C95400
STAINLESSSTEELCF8M
82TAPERPINSTAINLESSSTEELASTMA276S42000
STAINLESSSTEELASTMA564S63000
91SEATEPDMASTMD2000
NITRILEASTMD2000
102BUSHINGLONGBRONZEASTMB584C83600
111BODYDUCTILEIRONASTMA53665‐45‐12
122STUDSTEEL
132NUTSTEEL
141PACKINGRINGBRONZEASTMB584C83600
152V‐CUPPACKINGNITRILEASTMD2000
161UPPERPACKINGNITRILEASTMD2000
171PACKINGGLANDDUCTILEIRONASTMA53665‐45‐12
181KEYSTEEL
191RETAINERPLATESTEEL
202SCREWSTEEL
TABLE 6
FIGURE 7

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10
30” THRU 48” SIZE BUTTERFLY VALVES
TABLE 7
VALVE
SIZEUNITSABCD
(2KEYS)EFGHIJK
30"INCHES2.9530.7873.31.787X.472X2.5011.730.8713.782.6033.3124.3332.28
750mmmm75208420X12X632982235066846618820
36”INCHES3.5430.9843.94.984X.551X4.0011.730.8713.784.6536.6729.2538.27
900mmmm902510025X14X10029822350118906743972
42INCHES4.1341.1024.611.102X.630X5.5014.021.3016.345.9141.1034.0246.46
1050mmmm1052811728X16X1403563341515010448641180
48"INCHES4.7241.2605.281.260X.709X5.5014.021.3016.345.9144.3737.4453.07
1200mmmm1203213432X18X143563341515011279511348

VALVE
SIZEUNITSLMNOPQR
QTY
S
THREADSTGEAR
MOUNTWEIGHT
30"INCHES29.336.577.0938.7436.0029.09561¼"‐7UNC2.13F301109lbs.
750mmmm745167180984914.473954504Kg.
36"INCHES34.067.998.3145.9842.7533.62641½"‐6UNC2.40F301762lbs.
900mmmm86520321111681085.985461801Kg.
42INCHES40.599.8810.2852.9949.5039.88721½"‐6UNC2.60F352746lbs.
1050mmmm103125126113461257.31013661248Kg.
48"INCHES45.6710.8711.2659.4956.0044.84881½"‐6UNC2.76F353498lbs.
1200mmmm116027628615111422.41139701590Kg.
FIGURE 8

NIBCO Technical Services • Phone: [phone] • Fax: [phone]
11
30” THRU 48” SIZE BUTTERFLY VALVES
FIGURE 9
ITEMQTYDESCRIPTIONMATERIALSPECIFICATIONS ITEMQTYDESCRIPTIONMATERIALSPECIFICATIONS
11SCREWSTEEL 181DISCALUMBRZASTMA148C95400
21NUTSTEEL STAINLESSSTLCF8M
31WASHERSTEEL 191SEATEPDMASTMD2000
41O‐RINGNITRILEASTMD2000 NITRILEASTMD2000
54SCREWSTEEL 201BUSHINGLONGBRONZEASTMB584C83600
64WASHERSPRINGSTEEL 211BODYDUCTILEIRONA53665‐45‐12
71ENDCAPCOVERDUCTILEIRONA53665‐45‐12 221I.D.PLATEALUMINIM
81O‐RINGNITRILEASTMD2000 232RIVITALUMINIM
91ROLLPINSTEEL 242KEYSTEEL
102SPACERSTEEL 258SCREWSTEEL
111THRUSTBEARINGSTEEL 268WASHERSPRINGSTEEL
124BUSHINGSHORTBRONZEASTMB584C83600 278NUTSTEEL
132O‐RINGNITRILEASTMD2000 281TOPCONNECTIONSPTDUCTILEIRONA53665‐45‐12
141STEMLOWERSTAINLESSSTASTMA276S42000 291PACKINGRINGBRONZEASTMB584C83600
STAINLESSSTASTMA564S63000 304V‐CUPPACKINGNITRILEASTMD2000
151BUSHINGMID.BRONZEASTMB584C83600 311UPPERPACKINGNITRILEASTMD2000
163TAPERPINSTAINLESSSTLASTMA276S42000 321PACKINGGLANDDUCTILEIRONA53665‐45‐12
STAINLESSSTASTMA564S63000 332STUDSTEEL
171STEMUPPERSTAINLESSSTLASTMA276S42000 342NUTSTEEL
STAINLESSSTASTMA564S63000351PINSTEEL
181DISCDIASTMA536NYLONCOAT.361RETAININGRINGSTEEL
TABLE 8

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12
VI. OPERATION
Rotate the gear operator handwheel in the counter-clockwise direction to open the valve. Rotate
the handwheel in the clockwise direction to close the valve. Disc position can be determined by
looking at the pointer plate located on top of the gear operator. Note that the keys in the stem
also align with the sealing edges of the disc.
VII. REPAIR
No regular scheduled lubrication or maintenance is required except for regular exercising of the
valve. The valve needs to be fully cycled every 6 months, at a minimum, and inspected for
smooth operation and external leakage.
VIII. TROUBLESHOOTING
ISSUE POSSIBLE REASONS SOLUTIONS
LEAKAGE AT
VALVE SEAT
DISC IS NOT FULLY CLOSED
ADJUST GEAR OPERATOR OR
ACTUATOR CLOSE STOP - SEE
SECTION I
V
CONTAMINATION ADHERED TO
SEALING SURFACES OF SEAT CLEAN BOTH SEALING SEAT SURFACES
RUBBER SEAT HAS ERODED CHECK MEDIA TO SEE IF COMPATIBLE
WITH RUBBER SEAT MATERIAL
EXTERNAL
LEAKAGE AT
LOWER STEM
END CAP O-RING DAMAGED REPLACE O-RING
RETAINING COVER O-RING
DAMAGED REPLACE O-RING
ADJUSTING SCREW O-RING
DAMAGED REPLACE O-RING
EXTERNAL
LEAKAGE AT
UPPER STEM
STEM V-CUP PACKING WORN EVENLY TIGHTEN PACKING GLAND
NUTS - DO NOT OVERTIGHTEN!
STEM V-CUP PACKING
ASSEMBLY DAMAGED
REPLACE STEM V-CUP PACKING
ASSSEMBLY
LEAKAGE AT
FLANGE
CONNECTION
FLANGE BOLTS ARE NOT TIGHT
OR NOT TIGHTENED
PROPERLY
EVENLY TIGHTEN ALL FLANGE BOLTS
USING CROSS-OVER / CRISS-CROSS
PATTERN
VALVE CONNECTED TO
IMPROPER SIZE FLANGE
REVIEW FLANGE DIMENSIONS AND
COMPARE TO TABLE 1, INSTALL
PROPER SIZE FLANGE
SURFACES OF FLANGE ARE
CONTAMINATED INSPECT AND CLEAN FLANGES
SURFACES OF FLANGES ARE
DAMAGED INSPECT AND REPAIR FLANGE DAMAGE