MA-001 – TRANSFIX-family Installation Manual – Rev 3.0 18-Jan-16 Page 22 of 55
8.3.2 Fitting Instructions
1. Insert one end of the tubing into the Swagelok or Ham-Let fitting body as shown
in Figure 8—7.
Figure 8—7: Fitting body and tubing
2. Ensure that the tubing rests firmly on the shoulder of the fitting body and that the
nut is finger-tight.
3. Mark the nut with a fine-tipped permanent marker at the 6 o’clock position as
shown in Figure 8—8.
Figure 8—8: Nut at 6 o'clock position
4. While holding the fitting body steady, tighten the nut 1 and a 1/4 turns to the 9
o’clock position as shown in Figure 8—9.
Figure 8—9: Nut at 9 o'clock position
Do not use any type of thread sealant on compression-type tube fittings.
Do not open the valves on the transformer or the stainless steel tubing. This is
performed by GE-trained and certified personnel during the commissioning
phase to prevent air bubbles from entering the transformer.
8.3.3 Connection to Oil Supply Valve
Oil is typically taken from a valve midway up on the transformer or from an active cooling
loop (see Section 8.1 for information on valve selection). Oil must be taken from a location
where the oil is well mixed and in the active flow of the transformer oil. The temperature
of the oil at this location should not exceed 120 °C or be lower than −20 °C. Note: The
distance from the oil return valve should be at least 30 cm (12 in.).
These points must be observed when connecting to the oil supply valve:
Locate the valve on the transformer chosen for the oil supply line. Identify the
items needed to adapt the oil supply valve to a ¼ in. female NPT fitting. Select
fittings and adaptors made from stainless steel, brass or black iron.
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