Drain-All 870100 Panduan Instalasi - Halaman 12

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1. Connect balance line to vessel being drained, to header leaving vesssel being drained, or vent to atmposphere - do not manifold balance lines together.

2. Balance line balances reservoir of trap to vessel being drained. Control air operates air cyclinder. These two should not be connected together.

3. Bring control air from clean dry source downstream of dryer if possible, can manifold control air lines together.

THERE ARE THREE METHODS USED TO CONNECT THE BALANCE LINE PORT

Method -1

Connect the balance line port to the vessel

producing the condensate. This is the pref-

ered method since it is a closed-loop arrange-

ment. In the first four applications above, the

balance line is connected back to the vessel

that is producing the condensate. The pres-

sure on the incoming condensate to the trap

and the pressure in the balance line are the

same and the trap is filling by gravity. For this

method, the top of the trap must be below the

bottom of the vessel being drained.

VESSELS WITH BOTTOM LOWER THAN THE TRAP'S TRIGGER LEVEL

In the drawing below, there is a dotted line

indicating the level of the trigger level of the

trap. This is the height the condensate must

reach in the trap to start the discharge cycle.

When the balance line port is connected

back to the vessel or header pipe, as

shown in the drawing above, the trap is

filling by gravity. In these applications the

bottom of the vessel must be higher than

the top of the trap so that the condensate

flows by gravity down and out of the ves-

sel into the trap.

When the bottom of a vessel being

drained is lower than the trigger point in

the trap, as shown in the drawing to the

right, do not connect the balance line port

to the vessel or header pipe.

In the drawing to the right, if the balance

line were connected to the vessel or head-

er pipe, the condensate would be filling

022802 Model 1700-IG

INSTALLATION LOCATIONS

Method -2

Connect the balance line port to the head-

er pipe leaving the vessel producing the

condensate. This is an alternate method to

Method-1 when there is no convenient loca-

tion to connect the balance line to the vessel.

This is shown above in the drip leg applica-

tion. In the case of a dryer, however, connect-

ing the balance line to the header pipe leaving

the dryer essentially results in a bypass of the

dryer function. The condensate from the

dryer would have a path up the balance line

and back into the flow of dry air leaving the

dryer. That would not be desirable.

the trap by gravity. With the bottom of the

vessel being lower than the top of the trap,

this would result in condensate backing up in

the vessel to the same height of the conden-

sate in the trap. When the condensate reached

Trigger

level in

trap

Vessel like air receiver tank above with low vessel bottom

Control air from clean dry air

source if at all possible

For this

application

vent balance

line port to

atmosphere

Page 12

Method -3

Vent the balance line port to atmosphere

using a needle valve inserted in the balance

line port and slightly opened. This can be

used on any application but must be used

when the bottom of the vessel is lower than

the top of the trap. The needle valve should

be opened slightly to a point where only a

small amount of air can be felt leaving the

needle valve. This method provides a pres-

sure differential in the trap reservoir and con-

densate is blown into the reservoir instead of

filling by gravity.

the trigger level in the trap, shown by the dot-

ted line, the condensate would also reach the

same height in the vessel (the same dotted

line).

In an application where the bottom of the

vessel is lower than the top of the trap, the

balance line must be vented to atmos-

phere. Venting a small amount of air from

the trap reservoir to atmosphere results in

a pressure differential in the trap reser-

voir. This allows the pressure in the ves-

sel to push the condensate downward, out

of the vessel, and up into the trap. This

achieves proper filling of the trap while

removing all condensate from the vessel.

Send application questions to:

Technical Service

Phone: 865-970-9290

Fax: 865-977-6658

[email protected]