Manual

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INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

NIBCO Technical Services • Phone: 1.888.446.4226 • Fax: 1.888.336.4226

NIBCO INC.

WORLD HEADQUARTERS

1516 MIDDLEBURY ST.

ELKHART, IN 46516-4740

USA

PHONE: 574.295.3000

FAX: 574.295.3307

WEB: www.nibco.com

Review Date: 09/16/2013

Original Date: 09/16/2013

MAINTENANCE GUIDELINES

FOR NIBCO

2" THROUGH 10" CLASS 125, 150 & 250

FLANGED END OUTSIDE SCREW & YOKE (OS&Y)

CAST & DUCTILE IRON GLOBE AND ANGLE VALVES

Figure Numbers

Globe Valves:

F-718-B, Y

F-718-N

F-768-B, Y

F-738-31

Angle Valves:

F-818-B, Y

F-838-31

Special ductile iron models designated N.R. are non-return valves that prevent

backflow and are not recommended for steam service. NIBCO F-869-B, -Y is

recommended for steam and has separate guidelines.

*** CAUTION ***

ONLY QUALIFIED PERSONNEL SHOULD UNDERTAKE THE PROCEDURES

OUTLINED BELOW. NIBCO INC., ITS AGENTS, REPRESENTATIVES AND

EMPLOYEES ASSUME NO LIABILITY FOR THE USE OF THESE

PROCEDURES. THESE PROCEDURES ARE OFFERED AS SUGGESTIONS

ONLY.

Summary of content (10 pages)

PAGE 1
NIBCO INC. 1 5 1 6 M I D D L E B U R Y S T. PHONE: WORLD HEADQUARTERS E L K H A R T, I N 4 6 5 1 6 - 4 7 4 0 FA X : USA WEB: 574.295.3000 574.295.3307 w w w. n i b c o .
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1.0 GENERAL INFORMATION 1.1 SCOPE These guidelines are furnished for use in the installation, operation, and maintenance of NIBCO Class 125 globe O.S. & Y. I.B.B.M., cast iron, all iron, 2" thru 10", and angle pattern 2" thru 8"; Class 250 I.B.B.M. O.S. & Y. cast iron, 2" thru 8"; and Class 150 ductile iron globe and angle valves, all with bolted bonnet, rising-stem and having handwheel operation. 1.2 GENERAL DATA A. MANUFACTURER NIBCO INC.
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FLANGES A.N.S.I. - B16.5 A.N.S.I. - B16.1 150 Class flanges will match up with 125 Class iron flanges 300 Class flanges will match up with 250 Class iron flanges C. IDENTIFICATION PLATES An aluminum identification plate is attached beneath the handwheel nut. This identification plate gives the figure number of the valve, some general information about the trim and location of NIBCO’s corporate offices.
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1.3 DETAILED DESCRIPTION The globe and angle valves listed above and covered in these guidelines are iron valves made of ASTM A-126; Grade B material for Class 125 and 250 cast iron valves and from ASTM A-395 ductile iron material for Class 150 valves. These valves are operated with the handwheel and are used to start, stop or throttle the flow of fluids in piping systems. Globe and angle valves are rising-stem type only. When the stem rises, (about 25 % of nominal size), it also turns.
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2.2 HANDLING AND INSTALLATION Each valve should only be handled with apparatus that will safely support the valve weight. Slings should never be placed around the handwheel, stem, or gland adjustment parts. First, raise the valve to the vertical position and block it. Reposition the slings and lift the valve vertically. Remove the expendable end protectors, if present, and install the valve according to the piping layout.
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valve shop or machine shop may have to be consulted or contact NIBCO Technical Services or your nearest NIBCO representative for help. In many cases, it is less costly to replace the entire valve rather than have it repaired. 8. With the surfaces now clean and flat, place the gasket on the body and replace the bonnet. Be careful to use the chalk marks to put everything back together the same way it came apart. Always use a new, clean, fresh gasket.
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4.3 LEAKAGE THROUGH THE STUFFING BOX Leakage through the stuffing box packing may be stopped by tightening the packing nuts. Excessive tightening may cause difficult operation of the valve and could cause damage to the stem or packing nut; so do not over tighten. They should be just tight enough to stop the leak. If the pack gland follower has run out of travel, isolate, depressurize, and allow valve to cool and/or decontaminate as required, the valve for repacking or the addition of more packing.
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6.0 SPARE PARTS Normal spare parts to be maintained on hand are listed on the NIBCO materials list in the Bronze & Iron Valve catalog. If the bonnet or body are damaged, it is normally less expensive to remove the entire valve from the line and install a new one.
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4. Clean off the gasket. Make sure that no foreign particles are stuck to it that might cause a leak. Make sure the gasket is the correct size. It should fit inside the bonnet-body bolt holes. 5. Place the bonnet in position; insert the bolts and hand tighten the nuts against the body. A minimum of 2-1/2 threads should extend beyond each nut. 6. After the nuts are hand tight, follow the tightening sequence shown in the table.
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BOLT TIGHTENING SEQUENCE For any technical enquiries please call NIBCO Technical Services. NIBCO Technical Services • Phone: 1.888.446.4226 • Fax: 1.888.336.