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Installation Instructions Gemini Series 89
Nomenclature
A complete valve consists of three subassemblies; two Pipe Adaptor assemblies and a Center Sec-
tion assembly comprising functional elements such as the ball, seats, seals and stem.
Threaded Valves
When installing a threaded Series
89 valve fully assembled, apply the
wrench first to the Pipe Connector
being engaged by the male pipe
thread; fully make up pipe joint. (See
Figure 1). Complete the installation
by assembling pipe to the other con-
nector while that connector is se-
curely held against rotation with a
second wrench. (Figure 2).
Avoid wrenching the end of the
valve opposite the end being as-
sembled to prevent the Pipe Con-
nector from spinning inside the Pipe
Adaptor possibly damaging the
seals. Valve stem orientation may
be adjusted, after loosening the tie
bolts, by rotating the Center Section
to the desired position.
When it is advantageous to install
pipe adaptors separately, as when
a valve is being ‘cut in’ to an exist-
ing line, the following procedure
is recommended:
1. Disassemble valve and as-
semble Pipe Adaptors to the
ends of the pipe individually. Fully
make-up joints need not be
backed off for alignment.
2. Place Center Section in posi-
tion between Pipe Adaptors.
Enter and engage tie-bolts.
3. Snug tie-bolts evenly. As bolts
are tightened, be sure that the
Alignment Key (fixed to the Cen-
ter Section) is engaged in the
Pipe Connector Flange notches.
4. Rotate Center Section to in-
tended final position. Tighten tie-
bolts fully. See To Complete In-
stallation For All Valves on back
for torque recommendations.
