GE Kelman TRANSFIX 1.6 Installation Manual page 19

Note: Products, such as MULTITRANS, that are connected to more than one transformer must have
suitable dielectric fittings placed in-line with the tubing and installed close to the product (see Appendix E
for more details).
Consider these points when choosing where to route the tubing and estimating how
much tubing is required:
 The route must not interfere with the regular maintenance of the transformer. The
tubing shall not be routed so that it could be stepped on, tripped over or damaged
by activities near the transformer.
 The route shall be selected to allow the tubing to be secured to existing structures.
It is important that the tubing be adequately secured to the structure of the
transformer or ancillary structure with appropriate mounting hardware and
fasteners. (Swagelok or Ham-Let offer several options for mounting and securing
tubing.)
 When measuring the routes chosen for the tubing between the product and the
transformer oil supply and return valves – corners, bends and other obstacles
may add to the overall length and must therefore be taken in to consideration.
 The rigid tubing is typically supplied in 6 m (20 ft) lengths (see Appendix D). If the
length of either tubing path exceeds 6 m (20 ft), ¼ in. stainless steel compression
unions will need to be provided along with the additional tubing. The required
amount of tubing, in accordance with the specification in Appendix D, must be on
site on the day of the installation.
 Bending the rigid tubing is a complicated procedure and if there is a change to the
proposed route during the installation it could require extra tubing. For this
reason, it is advisable to order at least 20% more tubing than the initial required
estimate.
 Flexible tubing is also available, but is more expensive than rigid tubing, and must
be ordered in custom lengths.
 If the supplied shut-off valves are mounted to transformer valves that are 1.82 m
(6 ft) or more above the ground, an additional ¼ in. stainless steel compression
ball valve should be installed on the ¼ in. tubing at an easy to reach and visible
location. This valve should be located not more than 1.82 m (6 ft) above the
ground. This will facilitate turning off the oil flow, if needed, without having to
climb to reach the valve. One additional ¼ in. stainless steel compression ball
valve is included in the product installation kit.

If the oil temperature can fall below −20 °C, a heat trace may be fitted to the
oil pipe to increase the oil temperature before it enters the product.
trace shall need to be powered externally and be installed in accordance with the manufacturer's
instructions and local wiring regulations.
MA-001 – TRANSFIX-family Installation Manual – Rev 3.0
Note: The heat
18-Jan-16 Page 19 of 55