Installation Guide

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
Review Date: 11/26/18
Original Date: 2/16/88
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: [phone] • Fax: [phone]
1. To ensure proper installation, standard piping practices should be followed, including
ASTM B828.
2. Clean and flux the surfaces to be soldered.
3. Close the valve. This does two things – it gets the handle out of the way and protects the
PTFE seats from cold-flowing during heating by trapping them against the ball.
4. Wrap a wet rag around valve body.
5. With the flame directed away from the valve, apply heat to the end opposite the
threaded end piece. Apply solder and move off.
6. Repeat step 4 on threaded insert end.
7. Upon completion of steps 1 – 5, leave the valve in the closed position until cool.
8. Heat from soldering, if excessive, may affect stem seal. After completion of soldering, it
may be necessary to tighten packing gland. Always check for leakage after installation.
WARNING: DO NOT under any circumstances, solder the downstream end of this valve
while there is upstream pressure/or with fluid trapped in the cavity around
the ball. Thermal expansion of this fluid could produce excessive internal
pressure which could damage seat or body materials. Always drain down
the system and cycle the valve two to three times after drain down is
complete before applying heat. Steam created from trapped fluid in cavity
around the ball could cause the valve to burst if valve is heated excessively.
IV. THROTTLING SERVICE
Ball valves are generally not recommended for modulating service where critical flow
rates are required. Contact NIBCO Technical Services for throttling service
applications.
CAUTION: Throttling any ball valves is not recommended, where the valve is less
than 45° open.
V. MAINTAINANCE
1. Valves must be exercised from fully opened to fully closed periodically to assure
continued function. NIBCO recommends valves be put on a routine, periodic
exercise program.