Buying Guide

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NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227
TECH SERVICES PH: 1.888.446.4226 • FAX: [phone] • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: [phone]
www.nibco.com
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AHEAD OF THE FLOW
®
Revised 7/20/2018
Iron Valve Options and Accessories
Stem Extensions
Stem Extension
Stem extensions are designed to permit remote operation of gate, globe or angle valves by providing an
extension to the valve stem long enough to reach from the valve to the desired remote operating location.
The extension consists of a length of steel tube with a coupling on one end to attach to the valve, and a
coupling on the other end to attach to a handwheel or some other type of operating device.
The stem extension is made to accept the handwheel from the valve to which it is being attached.
Therefore, Extensions are not supplied with a handwheel unless it is special ordered.
Orders or inquiries for stem extensions to be attached to a NIBCO
®
valve must include the dimension
from the center line of the valve waterway to the top of the handwheel. This dimension is the ”A“
distance as shown below. Please specify separately coupling sets for iron valve extensions.
Adequate support must be provided for long stem extensions exceeding 12 ft. of ”A“ dimension. This
support should be rigid and of sufficient strength to prevent ”wind-up,“ deflection or transfer of abnormal
loads to the valve. This is a custom-built requirement provided by the customer.
Minimum ”A“ dimensions:
Rising Stem Valve
Valve Size ”A“
In. mm.
2" 21.00 533
2¹⁄₂" 21.50 546
3" 23.50 597
4" 28.00 711
5" 31.00 787
6" 35.00 889
8" 45.00 1,143
10" 53.50 1,359
12" 63.00 1,600
Non-Rising Stem Valve
Valve Size ”A“
In. mm.
2" 19.56 497
2¹⁄₂" 21.06 535
3" 21.94 557
4" 24.25 616
5" 25.50 648
6" 29.50 749
8" 35.06 891
10" 38.88 988
12" 44.56 1,132
NIBCO INC. reserves the right to change materials, options and accessories without notice.