MA-005 - MINITRANS Installation Manual - Rev 3.1
29-Sep-15
Page 26 of 85
If a flange-type valve is to be used to return the oil and the flange is drilled and
tapped to a ¼ in. female NPT fitting, then the drilled hole should be offset to the top
of the internal valve diameter to prevent an air pocket from being trapped behind
the flange (see Figure 8—9).
Figure 8—9: Flange example
Figure 8—10 depicts the Return Assembly kit.
Figure 8—10: Return Assembly kit
All pipe fittings should be tight and all threaded pipe fittings tightly wrapped with
PTFE tape with a light coating of PTFE paste or other quality pipe thread sealant
applied over the taped male threads to prevent leaks. Both of these items are
included in the product installation kit.
Note: GE recommends two wraps of PTFE tape or
three wraps for large pipe fittings.
Bolt holes
Inside valve diameter
behind the flange
¼ in. NPT return port
Check valve – the
arrow must point
toward
the
transformer.
Check valve – the
arrow must point
toward
the
transformer.
Elbow is only used if
the ¼ in. female NPT
fitting
face
is
vertical; it is not
used if the ¼ in.
female NPT fitting
face is horizontal.
Elbow is only used if
the ¼ in. female NPT
fitting
face
is
vertical; it is not
used if the ¼ in.
female NPT fitting
face is horizontal.
