Donaldson Torit TBV-2 Specifications download pdf (Page 23)

Bin Vent, Models TBV-2, TBV-4, and TBV-6

Delta P Control

Description

The Delta P Control monitors the differential

pressure between the clean and dirty air plenums,

providing a visual display of the filter condition.

When combined with a pulse timer, it controls the

pressure drop by turning the cleaning mechanism

On and Off at the chosen limits. There are three (3)

set points: High Pressure On, Low Pressure Off, and

Alarm. The first two, High Pressure On and Low

Pressure Off, control the filter cleaning system. The

third, Alarm, provides a relay output to activate an

external alarm supplied by others.

Operation

Normal

The Delta P Control monitors the pressure in the

clean and dirty air plenums while the unit is running.

The blower draws air through the filters, creating

a pressure drop. The Delta P control measures the

pressure drop and provides a visual display in inches

water gauge or metric (SI) units.

Filter Cleaning

When the pressure drop across the filter bags reach

the control’s High setpoint, the control closes an

output relay allowing a timer to trigger the cleaning

valves sequentially. When the control senses that the

pressure drop has decreased to the Low setpoint,

the relay opens and the cleaning cycle stops. This

sequence continues as long as the collector is in

use, maintaining the pressure drop within a narrow

range.

Alarm

The alarm setpoint is set to a higher setting than

used to start the filter cleaning cycle. It indicates

situations when the cleaning system cannot reduce

the pressure drop due to cleaning system failure, lack

of compressed air, or the end of the filter’s useful

life. There is a time delay prior to setting the alarm

to prevent nuisance trips. The Delta P Control also

provides an input connection for a remote alarm

reset.

For complete information, see the most current

version of the Delta P Installation, Operation, and

Maintenance manual.

™

Low

Set

Alarm

Set

Alarm Cleaning

High

Set

Delta P

Control

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Delta P Control Display

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Donaldson Torit TBV-2 Specifications Page 23

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