Levelcom 100 - Mounting; Figure 6 Side Entry Example

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Page 19

Mounting

There are a few things to consider when

mounting bubbler pipes in tanks. If the tank is

agitated with a mechanical stirring device, or the

liquid is subject to sloshing the bubbler pipe

supports will have to be strong enough to

maintain the integrity of the bubbler pipe.

The opening of the bubbler pipe should be as

near the lowest point of the tank as possible,

however there must be adequate clearance so

that any sludge that might build up in the tank

does not cause blockage of the bubbler pipe. 3

to 6 inch separation from the bottom of the tank

is common for bubbler installations. This

separation is called Bubbler to Bottom in the

configuration interface.

Onboard Tanks may have quite complicated

shapes and the placement of the bubbler pipe

deserves careful consideration. The bubbler

pipe should be mounted so that the opening of

the pipe is near the centerline of the tank. This

will help minimize the effects of side to side trim

in the ship. Fore and aft trim has some effect,

but for strength reasons the bubbler pipe is

usually mounted to the forward or aft bulkhead

of the tank.

Usually the bubbler pipe is mounted through the

top of the tank. This makes sure that the top of

the bubbler pipe is above the top of the tank, to

prevent any siphon action if the LevelCom 100 is

removed from the system for service. In shorter

tanks, up to about 10 feet in depth the bubbler

pipe can be mounted to a flange in the top of the

tank (Figure 5). In this case there would be no further supports for the bubbler pipe inside

the tank. Again, if the tank is agitated, or if the liquid can slosh with any force, the bubbler

pipe must be made of materials strong enough to withstand this liquid movement.

In taller tanks the bubbler pipe needs to be supported with standoffs fitted to the inside wall of

the tank. Make sure there are enough supports to maintain the strength of the bubbler pipe.

Figure 4 shows such standoffs and supports.

Figure 6 Side Entry Example

TUBING TO

LevelCom