Buying Guide

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]
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Installation Instructions for Metal Connections
Analyze the application to determine which valve is best suited for
installation, keeping in mind the service for which the valve is recom-
mended. Before installing the correct valve, review the following
installation instructions to prevent damage to the valve and assure its
maximum efficiency.
For Plastic Installation Instructions, contact Technical Services at
1.888.446.4226.
SOLDERING
1. Cut tube end square. Ream, burr and size.
2. Use sand cloth or steel wire brush to clean both tube and cup to a
bright metal. Steel wool is not recommended.
3. Apply flux to outside of tube and inside of solder cup. Surfaces to
be joined must be completely covered. Use flux sparingly.
4. Be sure that valve is fully open. This applies only to globe
and gate valves. Apply heat to tube first. Transfer as much heat
as possible through the tube into the valve. Avoid prolonged
heating of the valve itself. For ball valves, consult the instal-
lation instruction sheet or contact NIBCO Technical Services for
assistance.
5. Use just enough solder: with wire solder, use 1" for C⁄v" valve, etc.
If too much solder is use, it may flow past tube and clog seating
area. The correct amount of solder is 1¹⁄₂ times the diameter
of the fitting or valve.
6. Remove excess solder with small brush while plastic (soft), leaving
a fillet around end of valve as it cools.
BRAZING
The strength of a brazed joint does not vary appreciably with the
different brazing materials, but depends to a large extent upon the
maintenance of proper clearance between the outside of the tube and
the valve socket. The interior dimensions of brazing valve sockets are
machined to the closest tolerances and finished smooth to promote full
capillary attraction.
NOTE: Care should be observed in cleaning and in removing residues of the cleaning
medium. Attempting to braze a contaminated or improperly cleaned surface will result
in an unsatisfactory joint. Brazing alloys will not flow over or bond to oxides. Oily or
greasy surfaces repel fluxes, leaving bare spots that oxide and result in voids and
inclusions.