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

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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NIBCO INC.

WORLD HEADQUARTERS

1516 MIDDLEBURY ST.

ELKHART, IN 46516-4740

USA

PHONE: [phone]

FAX: [phone]

WEB: www.nibco.com

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

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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

III. GEAR OPERATOR INSTALLATION AND HANDWHEEL POSITIONING

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

Valve

Series

LD/WD/LC/WC

1000/2000/3000/5000 Series

LD7000/8000 Series N200 Series

Valve Size

Minimum

Pipe/Flange

ID for Disc

Clearance

Maximum

Pipe/Flange

ID for

Proper Seal

Minimum

Pipe/Flange

ID for Disc

Clearance

Maximum

Pipe/Flange

ID for

Proper Seal

Minimum

Pipe/Flange

ID for Disc

Clearance

Maximum

Pipe/Flange

ID for

Proper Seal

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 — —

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TABLE 2

Tools Required

Fire Protection

(UL/FM)

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

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

All Sizes 5/16” Socket Wrench for Stamped Flag

Commercial

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.