NIBCO LD-1000, LD-2000, LD-7000, LD-8000, LD-3000 Installation Manual

NIBCO INC.

WORLD HEADQUARTERS

1516 MIDDLEBURY ST.

ELKHART, IN 46516-4740

USA

PHONE: [phone]

FAX: [phone]

WEB: www.nibco.com

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

Review Date: 06/14/2016

Original Date: 06/01/2009

Installation and Maintenance Guidelines for

NIBCO

®

Butterfly Valves with Rubber Seats

Fire Protection Valves
Commercial Series Valves *UL/ULC/FM Listed

CWP Rating WWP Rating

Figure Numbers

LD-1000/2000/7000/8000 Series
LD/WD-2000/3000/5000 Series

LC/WC-2000 Series
LD/WD-3500 Series* 250 psi/17.2 Bar CWP, 2” – 12”
GD-4700 Series* 300 psi/ 20.7 Bar CWP, 2-1/2” – 8”

175 psi/ 12.1 Bar CWP, 10”
GD-6700 Series** 350 psi / 24 Bar CWP, 2-1/2” – 10”

GD-4800 Series* 300 psi / 20.7 Bar CWP, 2-1/2”-10”
GD-6800 Series* 350 psi / 24 Bar CWP, 2-1/2” – 10”

FC/FD-2000 Series
FC/FD-5000 Series

N-200 Series

** UL Listed only

For any technical inquiries please call NIBCO Technical Services

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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I. SHIPMENT & STORAGE

NIBCO butterfly valves are individually boxed thru the 12" size. The 14" through 60" butterfly
valves are shipped individually with the faces covered using cardboard or plywood to protect the
flange sealing surfaces.

The disc is shipped in the nearly closed position to protect the sealing edge and prevents 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

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 (Series A) flanges. Cast iron and steel flat-face flanges can be used with all
NIBCO butterfly valves; however, steel raised-face flanges should not be used with cast grey
iron lug-style butterfly valves (NIBCO LC2000 and N200 series).

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 lug and wafer 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 2” 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

.

NIBCO butterfly valves are bi-directional and may be installed with flow in either direction. These
valve 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.

Butterfly valves should be installed a minimum of six (6) pipe diameters, upstream and
downstream, from other line components. This is not always practical but it is important to design
in as much distance as possible. Interference may occur when valves are installed directly to
the outlet flange of a swing check, silent check, or reducing flange. Check valve and butterfly
valve combinations are very popular; normally a short spool piece is required between the
valves.

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 adjustable sprocket rim (chain wheel)
for remote operation. Before valve installation, please review Gear Operator Installation and
Hand Wheel Positioning section of this booklet. These instructions illustrate how to orient the

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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.

TABLE 1

Piping/Flange Inside Diameter Requirements - Flange, Lug, & Wafer BFVs Only

Valve

Series

Valve Size

2” 2.00 2.49 1.31 2.43 1.38 2.24

2½” 2.37 2.86 1.89 3.06 1.95 2.74

3” 2.67 3.43 2.64 3.65 2.66 3.33
4” 3.69 4.55 3.67 4.75 3.67 4.55
5” 4.76 5.62 4.44 5.54 4.48 5.50
6” 5.84 6.62 5.96 6.84 5.96 6.66
8” 8.01 8.62 7.85 8.89 7.85 8.61

10” 10.00 10.80 9.73 10.70 9.76 10.75

12” 11.99 13.12 11.71 12.74 11.72 12.79
14” 13.02 14.01 13.02 15.50 — —
16” 15.20 16.30 15.20 17.90 — —
18” 17.09 18.31 17.16 19.67 — —
20” 18.90 20.08 19.10 21.05 — —
24” 23.05 24.71 23.04 25.57 — —
28” — — 27.10 29.31 — —
30” 29.06 30.29 29.08 31.28 — —
32” — — 30.91 33.93 — —
36” 33.59 35.78 33.60 36.77 — —
42” 39.83 42.77 39.87 44.96 — —
48” 44.85 48.27 44.86 51.57 — —
54” — — 50.67 54.25 — —
60” — — 54.93 60.25 — —

1000/2000/3000/5000 Series

Pipe/Flange

LD/WD/LC/WC

Minimum

ID for Disc

Clearance

Maximum

Pipe/Flange

ID for

Proper Seal

LD7000/8000 Series N200 Series

Minimum

Pipe/Flange

ID for Disc

Clearance

Maximum

Pipe/Flange

ID for

Proper Seal

Minimum

Pipe/Flange

ID for Disc

Clearance

Pipe/Flange
Proper Seal

III. GEAR OPERATOR INSTALLATION AND HANDWHEEL POSITIONING

Maximum

ID for

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TABLE 2

Tools Required

2” – 8” 9/16” Hex Wrench and 1/8” Hex Allen Wrench

Fire Protection

(UL/FM)

Commercial

10” – 12” 3/4” Hex Wrench and 1/8” Hex Allen Wrench

All Sizes 5/16” Socket Wrench for Stamped Flag

2” – 8” 9/16” Hex Wrench
10” – 14” 3/4” Hex Wrench
16” – 18” 1-1/8” Hex Wrench

1. Install hand wheel (1) onto gear operator shaft and secure with pin (2). (If not already attached)
See Figure 1.

2. Turn the hand wheel (1) clockwise until in full SHUT position.

3. Remove 2 screws holding pointer cover plate to center of gear operator to expose bore. Retain
pointer cover plate and screws for reinstallation later.

4. Assure valve is in full SHUT position, turn valve stem (5) to close disc if necessary.

5. Assure mounting base of gear operator (3) and the valve top flange (6) are both clean and dry.

6. Determine desired hand wheel position in reference to the piping system and compare with Fig.

2. There are 2 mounting positions for the gear operator onto the valve and the valve can be
mounted in either direction into the piping system. This will allow hand wheel to be positioned in
any of the 4 quadrants as shown in Fig. 2. Note that all Fire Protection and 10” and 12” size
commercial valves allow for hand wheel positioning in quadrants 1 and 2 only.

7a. Gear operators with adapter bushing:

 Insert adapter bushing (4) into gear operator (3) bore aligning bushing key with desired

keyway. Keyway selection will determine hand wheel orientation position. (Note that Fire
Protection model adapter bushings differ from illustration and only have 1 keyway position).

 Align adapter bushing (4) bore with valve stem (5) and slide gear operator assembly onto valve

stem (5) until seated with valve top flange.

7b. Gear operators without adapter bushing:

 Align gear operator (3) bore with valve stem (5) and align with desired keyway. Keyway

selection will determine hand wheel orientation position.

 Slide gear operator assembly onto the valve stem (5) until seated with valve top flange.

8. Tightly secure gear operator (3) to valve top flange (6) using supplied* fasteners (7 & 8).

9. Reinstall pointer cover plate onto gear operator removed in Step 3 above. Arrow should be aligned
to indicate SHUT position.

10. Install flag and secure with Allen Screw. (Fire Protection gear operators only).

11. Rotate hand wheel from SHUT to Full OPEN positions several times to assure proper orientation.
See Stop Adjustment Procedure Section of this instruction booklet if stop alignment adjustment is
necessary.

12. Proceed with valve installation into piping system.
* A minimum of two fasteners is required, installed in opposite diagonal corners.

NOTES:

 For Fire Protection gear operators, it is critical to use only the key supplied with gear operator

in order to conform to UL, FM and ULC specifications.

 Connection of gear operator to valve stem varies depending on gear operator model, size and

style. The adapter bushing and key may be different from Figure 1 illustration shown.

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IV. VALVE INSTALLATION PROCEDURE – FLANGE, LUG & WAFER STYLE ONLY

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.

NOTE: Fully open and fully shut any butterfly valve before attempting to install it into a system, to
ensure and confirm the valve is operational across its travel range and seating properly in the opened
and shut positions.

1. Carefully ins ert the valve between the pipe flanges. Do not apply any lubricants to the seat faces

as this may damage them.

2. Line up, center and secure the valve between flanges using desired bolts or studs as listed in Table

4. Do not tighten bolts at this time.

3. 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.

4. After proper operation is verified, tighten the bolts to the minimum recommended bolt torques listed

in Table 3, below, using a cross-over pattern as shown in Figure 3. NOTE: When installing any

cartridge liner butterfly valve, i.e. N200 valves or LD 1000/2000 valves NPS 14” and larger,
between two flanges, it is critical that the cartridge liner be evenly compressed from both
sides of the mating flanges (REFER to NIBCO Technical Bulletin NTB-1012-03 for more
details). NIBCO recommends a multi-stepped process utilizing the cross-over pattern be used to

draw the flanges against the liner from both side of the valve at the same rate, ensuring the liner
is compressed evenly. This method differs from the practice used on smaller valves, wherein one
flange side is completely tightened before moving to the opposite side.

5. 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 BELOW.

6. Recommended torques are made without warranty. Installer must verify proper strength bolts for

application. Bolts shall be clean and un-lubricated.

NOTES:

 LUG STYLE VALVES – Extra care should be used when installing with raised faced flanges.

Over tightening of bolts can result in broken valve lugs.

 Class 250 cast iron and Class 300 steel flanges cannot be used on these valves.
 Rubber faced or mechanical flanges are not recommended.
 These valves are not recommended for steam service.
 Valves should not be assembled to the flanges & then welded into the piping system.
 Lever-lock handles are not recommended for use on 8” and larger valves.
 Do not install valves with EPDM liner in compressed air lines.

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TABLE 3

Recommended Bolt Tightening Torques

Flange Size Bolt Size

2” – 4” 5/8” 20 70

5” – 8” 3/4” 30 120
10” and 12” 7/8” 50 200
14” and 16” 1” 70 240
18” and 20” 1-1/8” 100 380

24” – 30” 1-1/4” 140 520
32” – 48” 1-1/2” 200 800
54” – 60” 1-3/4” 350 1800

Minimum Bolt

Torque (ft./lbs.)

Maximum Bolt

Torque (ft./lbs.)

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)

TABLE 4

Recommended Bolt Lengths

A)

CLASS 125

VALVE SIZE

SERIES ONLY

1000 / 2000 / 3000

5000 / 7000 / 8000

2” 1.69

2-1/2” 1.81

3” 1.81
4” 2.06 0.94 0.94 — 1.75 5.00 16 5/8 – 11 UNC

5” 2.19 0.94 0.94 — 1.75 5.00 16 3/4 – 10 UNC
6” 2.19 1.00 1.00 — 2.00 6.00 16 3/4 – 10 UNC

8” 2.38 1.12 1.12 — 2.25 6.00 16 3/4 – 10 UNC
10” 2.69 1.19 1.19 — 2.25 7.00 24 7/8 – 9 UNC
12” 3.00 1.25 1.25 — 2.50 7.00 24 7/8 – 9 UNC
14” 3.01 1.38 1.38 — 2.50 7.00 24 1 – 8 UNC
16” 3.38 1.44 1.44 — 3.00 8.00 32 1 – 8 UNC
18” 4.12 1.56 1.56 — 3.00 9.00 32 1-1/8 – 7 UNC
20” 5.14 1.69 1.69 — 3.50 10.00 40 1-1/8 – 7 UNC
24” 5.98 1.88 1.88 — 4.00 11.00 40 1-1/4 – 7 UNC

28” 6.42

30” 6.57

32” 7.40

36” 8.00

42” 9.88

48” 10.87

54” 15.00

60” 15.00

BODY WIDTH

TOTAL VALVE

CAST IRON

ASME B16.1

0.63 — — 1.25 4.00 8
— 0.75 — 1.50 4.00 8

0.69 — — 1.50 5.00 8
— 0.88 — 1.75 5.00 8

0.75 — — 1.50 5.00 8
— 0.94 — 1.75 5.00 8

— — — — — 56
— — — 4.00 — 56
— — — 4.00 — 56
— — 2.81 5.00 — 56

2.12 — — 3.50 — 56
— — — 3.00 — 56
— — — 3.50 — 56
— — 2.94 4.25 — 56
— — — — — 56
— — — 4.00 — 56
— — — 4.00 — 56
— — 3.91 5.00 — 56

2.38 — — 4.00 — 64
— — — 3.50 — 64
— — — 4.00 — 64
— — 3.56 5.00 — 64

2.62 — — 4.50 — 72
— — — 4.00 — 72
— — — 4.50 — 72
— — 3.81 5.50 — 72

2.75 — — 4.50 — 88
— — — 4.50 — 88
— — — 5.00 — 88
— — 4.25 6.00 — 88

3.00 — — 7.00 — 88
— — — 7.00 — 88
— — — 7.50 — 88
— — 4.75 8.50 — 88

3.12 — — 7.00 — 104
— — — 7.00 — 104
— — — 8.00 — 104
— — 5.19 9.00 — 104

FLANGE THICKNESS

ASME B16.5

CLASS 150 STEEL

FLANGE THICKNESS

MSS SP-44

CLASS 150 STEEL

ASME B16.47 (SERIES

RECOMMENDED

FLANGE THICKNESS

LENGTH

CAP SCREW

(LUG & FLANGE

STYLE VALVES

BOLT LENGTH

RECOMMENDED

(WAFER VALVES)

TOTAL QUANTITY

(TO MOUNT VALVE

BETWEEN 2 FLANGES)

CAP SCREWS / BOLTS

CAP SCREW SIZE

5/8 – 11 UNC
5/8 – 11 UNC
5/8 – 11 UNC

1-1/4 – 7 UNC

1-1/4 – 7 UNC

1-1/2 – 6 UNC

1-1/2 – 6 UNC

1-1/2 – 6 UNC

1-1/2 – 6 UNC

1-3/4 – 5 UNC

1-3/4 – 5 UNC

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GEAR OPERATOR PART NUMBERS

2” – 12”

UL/FM VALVE GEAR OPERATOR

2” – 24”

COMMERCIAL VALVE GEAR OPERATOR

Part

Number

T117166 PP
T117167 PP
T117890 PP
T117168 PP

UL/FM VALVE GEAR OPERATOR

Part

Number

T118775 PP 2-1/2” – 4” GD-4865/6865
T118776 PP 6” – 8” GD-4865/6865
T117168 PP 10” GD-4865/6865

Valve

Size

2” – 4”

2-1/2” – 3”

5” – 6”
4” – 6”

8”
8”

10” – 12”

10”

2-1/2” – 10”

Valve

Size

Valve

Series

WD/LD-3510

GD-4765

WD/LD-3510

GD-4765

WD/LD-3510

GD-4765

WD/LD-3510

GD-4765

Valve

Series

Part

Number

T117118 PP

T117119 PP

T117120 PP
T117121 PP

T116697 PP
T026150 PP
T026151 PP
T026211 PP
T026212 PP

Valve

Size

2” – 6”
2” – 5”

8”

6” – 8”

10”
12”

10” – 12”

14”
16”
18”
20”
24”

Valve

Series

WD/LD-2000/3000

FC/FD/GD-

2000/5000/4000

WD/LD-2000/3000

FC/FD/GD-

2000/5000/4000
WD/LD-2000/3000
WD/LD-2000/3000

FC/FD/GD-

2000/5000/4000

LD-1000/2000

TABLE 5

2” – 8” valves 4mm or 5mm Hex Allen Wrench
10” – 18” valves 6mm Hex Allen Wrench
20” – 24” valves 8mm Hex Allen Wrench

Tools Required

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V. STOP ADJUSTMENT PROCEDURE

NOTE: It is best to visually check the valve disc OPEN and SHUT 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. Rotate the hand wheel clockwise until it stops. Visually check to see that the valve disc is
centered in the valve seat for proper seal. Note that the indicator flag (Fire Protection) or
pointer (Commercial) on top of gear operator represents the disc position. If the stop location
is not correct, proceed to step 5.

3. Rotate the hand wheel counter-clockwise until it stops. Visually check to see that the valve
disc is centered in the valve opening. Note that the indicator flag (Fire Protection) or pointer
(Commercial) on top of gear operator represents the disc position. If the stop location is not
correct, proceed to step 5.

4. If both stops are set correctly, valve is ready for installation.

5. Stop adjustment – Using a proper size hex Allen wrench, remove both locking set screws (A)
as shown in Figures 5 and 6.
 SHUT stop adjustment - Using proper size hex Allen wrench, turn set screw (B) counter-

clockwise 2 turns. Rotate hand wheel until disc is centered in valve seat. Turn set screw
(B) clockwise until it stops. Secure set screw “B” by replacing only one locking set screw
(A) in same hole and tightening it until it stops.

 OPEN stop adjustment – Using proper size hex Allen wrench, turn set screw (C) counter-

clockwise 2 turns. Rotate hand wheel until disc is centered in valve opening. Turn set
screw (C) clockwise until it stops. Secure set screw (C) by replacing second locking set
screw (A) in same hole and tightening it until it stops.

6. Again visually verify both OPEN and SHUT stops are correctly set. Repeat step 5 if
necessary.

7. 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 have to visually check the flag (Fire Protection) or pointer
(Commercial) position. Because the exact flag or pointer position is more difficult to
determine, it may take a couple tries to set the SHUT stop. OPEN stop adjustment is not
critical; ±5° travel is adequate.

NOTE: The gear operator’s OPEN and SHUT positions have been set at time of shipping.
These instructions should be used for slight adjustment as needed.

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VI. SWITCH DETAILS– UL/FM FIRE PROTECTION GEAR OPERATORS

Rating:

11 amps @ 125 VAC 60 Hz, or 1 amp @ 28 VDC non-inductive.

Wiring:

All lead wires are 18 AWG, 18 inches long and exit the operator housing through a single threaded
hole designed for use with a ½ inch conduit fitting.

Valve Series

GD4765-8N
WD/LD3510-8*

GD4765C-8N
WD/LD3510C-8*

GD4865-8N
GD6865-8N

GD4865C-8N
GD6865C-8N

*2002 or Newer Model Wafer & Lug UL/FM Butterfly Valves

Supervision Position Switch Kit Number

Valve Open

Valve Closed

T117774 PP

(TS-4)

T1447531 PP

Valve Open

Valve Closed

T1446762 PP

T1447532 PP

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VII. TS-4 SWITCH T-117774 PP & T-1446762 PP SWITCH REPLACEMENT

INSTRUCTIONS FOR FACTORY INSTALLED SWITCHES FOR NIBCO GD4765-8N,
GD4765C-8N, WD/LD3510-8, WD/LD3510C-8 (2002 or Newer Model Wafer & Lug
UL/FM Butterfly Valves)

TABLE 6

Tools Required

1/8” Hex Allen Wrench

All valves

2” – 8” valves

10” – 12” valves

Standard Flat Blade Screwdriver

Continuity Tester

5/32” Pin Head Wrench

9/16” Socket Wrench

3/16” Pin Head Wrench

3/4” Socket Wrench

FIGURE 8

1. Remove flag (A) by backing out (approx. 2 turns) screw (B). See Figure 8.

2. Remove one tamper-proof pin head screw (C), three hex head screws (D), and gear operator
cover (E).

3. Remove the two screws holding the switch assembly into the housing, and one screw holding
the green ground wire to housing, and remove complete switch assembly.

4. Feed electrical wires of new switch assembly through the conduit hole in rear of housing.

5. Place two screws (with lock washers) thru the switch mounting holes, then thru the mounting
holes of the insulation paper. Place switch assembly (F) into gear housing with switch actuating
arms against quadrant gear. Tighten two screws to secure switches, and one screw to secure
green ground wire to housing.

6. Conduct switch continuity test to make sure they are functioning properly. Refer to Figure 7.

7. Reinstall cover plate, screws, and flag. Tighten all screws.

8. Auxiliary switch end connection to be reviewed and accepted by local authority having
jurisdiction.

NOTE: Instructions are the same regardless of valve end connections.

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VIII. T-1446762 PP AND T1447532 PP SWITCH REPLACEMENT INSTRUCTIONS

FACTORY INSTALLED SWITCHES FOR NIBCO GD4865-8N, GD4865-C-8N,
GD6865-8N, GD6865-C-8N UL/FM Butterfly Valves

NOTE: Grooved end valve shown
For illustration purposes only.
See SECTION VII. SWITCH REPLACEMENT INSTRUCTIONS

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IX. KEY DRIVE REPLACEMENT INSTRUCTIONS – 2” THRU 12” UL / FM BUTTERFLY

VALVES

NOTES:

 All replacement parts must be obtained from your NIBCO distributor. Key drive material and

size is specifically designed to meet performance requirements of UL and FM. Failure to use
the properly sized replacement parts may void the UL and FM ratings.

 Drive Key (s ection of weakness) will shear if excessive torque is applied to the input of the

gear operator while the disc is blocked partially open.

TABLE 7

Tools Required

All valves 1/8” Hex Allen Wrench

2” – 8” valves 9/16” Socket Wrench

10” – 12” valves 3/4” Socket Wrench

FIGURE 9

1. Loosen the set screw (B) that secures the flag (A) to the stem. Remove the flag. See Fig. 9.

2. Remove the four (4) hex head cap screws (C) that fasten the gear operator (D) to the valve.

3. Lift the gear operator straight up from the valve. In most cases the adapter bushing (F) will stay
in the segment quadrant gear because the broken key causes interference between the gear
and adapter bushing.

4. Pull the adapter bushing from the gear. Some force may be required.

5. After removing the adapter bushing, remove the broken key.

6. Place the new key in keyway of adapter bushing (F).

7. With drive adapter bushing and key in place within gear operator, carefully slide the gear
operator over stem until it rests flush on the valve operator mounting flange. The hand wheel
may need to be turned in order to align bolt holes and the orientation pin.

8. Secure gear operator with four (4) hex head screws (securely tighten), replace flag on stem
and then tighten set screw on flag.

9. Check operation of valve by turning hand wheel from fully OPEN to fully SHUT position.

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X. MEMORY STOP INSTALLATION INSTRUCTIONS –

2” THRU 24” SIZE COMMERCIAL GEAR OPERATORS ONLY

TABLE 8

Tools Required

All valves

2” – 8” valves 10mm Wrench

10” – 24” valves 13mm Wrench

2.5mm Hex Allen
Wrench

FIGURE 10

1. Remove the two screws holding the top cover (Indicator Pointer) onto segment gear. Discard
cover and screws. See Figure 10.

2. Place indicator (5), supplied with kit, around bottom hub (4). Align key (6) on bottom hub with
slot in segment gear and slide into place.

3. Attach with two supplied M4 x 12 flat head screws (3).

4. Remove one cap screw (1) holding cover onto gear operator housing and replace with stop
pin (7).

5. Use cap screw (1) you just removed to secure the top hub (2) to the bottom hub (4). Top hub
can be moved 360 degrees in 5 degree increments.

6. Tighten cap screw (1) once top hub is appropriately set.
NOTE: The gear operator provides a large mechanical advantage. Be careful to stop turning
the handwheel when the pointer of top hub (2) contacts stop pin (7) to prevent damage.

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XI. MAINTENANCE AND REPAIR – ALL SERIES & SIZES - VALVES ONLY

Due to the many unique features in the NIBCO butterfly valve design, there is no regular
maintenance or lubrication required.

XII. GEAR OPERATOR SERVICE & MAINTENANCE

During installation, customer should carefully adjust gear operator stops for proper valve OPEN and
SHUT positioning.

NIBCO gear operators are suitable for both indoor and outdoor service. However, outdoor service
can be harsh depending upon the conditions that the unit is exposed to. For example; constant
exposure to high heat, humidity, rain, snow, salt spray, or other corrosive media may lead to corrosion
of the iron castings, steel hand wheel shaft, or other components.

NIBCO recommends that gear operators exposed to these extreme conditions be checked and
serviced on a regular basis. This can be accomplished during normal exercising or operation of the
valve (Butterfly Valves should be operated at least once per year or depending upon conditions, as
often as quarterly).

NIBCO tries to balance the needs of our customers and provide a gear operator that fits most service
conditions. It is the responsibility of the ultimate installer / owner to specify the valve and gear operator
based upon the application and conditions that it will be exposed to.

For general gear operator maintenance, refer to NIBCO Technical Bulletin NTB-1012-01

.

For harsh outdoor service refer to NIBCO Technical Bulletin NTB-0208-02 to address maintenance
that can be performed in the field for units installed outdoors in extreme conditions.

For installations where spare parts are held on site, it is suggested that a spare gear operator be held
as an interchangeable item.

NIBCO Technical Services • Phone: [phone] • Fax: [phone]

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