Manual

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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.

NIBCO Technical Services • Phone: 1.888.446.4224 • Fax: 1.888.336.4224

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: 01/18/2012

Original Date: NA

Installation and Maintenance Guidelines for

NIBCO

Bronze Gate Valves

1/4” to 3” Class 125, 150, 200, 300 and 175 WWP

Figure Numbers

T-103-HC

T-104-O

T-111-113

S-111-113

T-134-136

S-134-136

T-131

T-133

T-135

T-154-A

T-174-A

T-176-A

T-174-SS

T-176-SS

Summary of content (7 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 instructions are furnished for use in the installation, operation and maintenance of NIBCO 1/4” to 3” Class 125, 150, 200, 300 and 175 WWP bronze gate valves, with screwed in or union bonnet, rising stem or non-rising stem, and having handwheel operation. 1.2 GENERAL DATA A. MANUFACTURER NIBCO INC. 1516 Middlebury Street Elkhart, IN 46516 Phone: (574) 295-3000 B.
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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. When more detailed information is required, the NIBCO Bronze & Iron or Fire Protection catalog should be referred to using the valve figure number as the guide. D.
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The body and bonnet are held together by threads of the male and female type; male threads being on the bonnet section and female threads being within the body. There are no gaskets between the body and bonnet to affect seals. This is strictly a metal-tometal seal as required by standards. This general arrangement is used on the Class 125 and is also used on the Class 150 gate valves.
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on the delicate seating surfaces. The boxes are not waterproof and, therefore, require that they be protected from the weather. 2.2 HANDLING AND INSTALLATION Each valve should be handled very carefully and not dropped or thrown into a dirty environment before it is assembled into the system.
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when union nut joints are used. This gives lubrication to the joint so good tightening pressures can be applied. The chain wrench or socket wrench should be used to tighten the bonnet. Stop the union nut approximately at the same place where it was when the valve was disassembled or possibly slightly past that mark. Remember any nick on the surfaces on the bonnet sealing area assures leakage.
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5.0 MAINTENANCE 5.1 TOOLS AND EQUIPMENT Standard wrenches and tools are suitable for servicing valves as follows: A. For removing bonnet of the union type – a chain wrench is normally used or the appropriate socket that will fit the bonnet union nut. For screw in type bonnets – generally a socket wrench or open end wrench may be used if extreme caution is used. Pipe wrenches on union nuts or screw in bonnets have a definite crushing action which will deform the component and are not recommended.