Dear sganesh,

A question, like you are posing here, should describe the situation much more precise.

I assume that there is a filter installed between the hopper and the blower?

(Or is it a centrifugal fan?) (Is there a filter installed?)

In case there is a filter, the lime dust will fill the hopper, until the installed leveltester(?) gives a pre-warning signal and if no action is taken, a second leveltester(?) shuts down the installation if necessary. (Are there leveltesters installed?)

If there is no filter installed in the hopper, the installation seems to be useless, as the dusty air is blown back into the atmosphere.

If the blower is a positive displacement blower, there should be a vacuum safety spring relief valve installed and an overload current relay must be installed.

This protects your V-belts and electric motor.

No dust should be admitted into a positive displacement pump.

If the blower is a centrifugal fan, there is no problem at all.

A fan can run at all pressures and even consumes the least energy when running at maximum pressure and no volume flow.

Dust for a short period should not destroy you fan.

Have a nice day

Teus ■

Dear Mr sganesh,

As long as the bag filters are not leaking, there is no reason to worry about the fan.

A clogged bag filter, caused for whatever reason, will not harm the fan.

The dust extraction has stopped by then, but that you should have noticed way before, because the dust extraction will reduce.

all for now

Teus ■

The first thing I'd do is connect a rotation monitor to the rotor of the rotary valve and connect it to a flashing light and hooter to warn if the valve stops. ■

And a filter pressuredrop alarm. ■