Industrial Silo Filter Vents are used to vent silos into which material is conveyed. As the material fills the silo, it displaces air, which must be vented without loss of product. Product collected on the filter bags is returned to the silo by shaking the bags after filling has been completed. Silo Filter Vents are available in two series:

• Natural Vented, where a low positive silo pressure is acceptable.
• Blower Assisted, where a negative silo pressure is desirable.

A Continuous Duty Vent (72-CS) is also available to provide continuous filtration through two individual compartments, one in the collecting mode while the other is being cleaned.

All options are electric, so no air supply is required.

Silo Filter Vent Operation

Natural Vents (IS & KS Models)

Displaced air from the silo filling operation is filtered
through the bags. After each truck is unloaded the bags must be cleaned. To clean the bags, shake them for approximately 60 seconds. (Mini-C10 control is optional)

Blower Assisted Vents (JS & LS Models)

Displaced air from the silo filling operation is filtered through the bags, while being assisted by a blower. After each truck is unloaded the bags must be cleaned. To clean the bags, turn the blower off and shake them for
approximately 60 seconds. (Mini-C8 control is optional)

Continuous Duty Vent (72 CS)

The baghouse is split into two 36 bag compartments so that one is in use at all times. A timer switches the diverter valve to the opposite side once every hour. The timer can be adjusted to switch sides more frequently if necessary. Each time the damper position is switched, the compartment taken off line is shaken for 60 seconds. (C6G2E control is included)

Optional Controls

Mini C-8 Includes solid state one minute timer with automatic stop, terminal blocks, indicator light, and fuse for manual control of blower and activation of cycle (cleaning cycle actuates after blower shuts down), in a NEMA 4 enclosure [115VAC /1/60]. Motor starters not included. Shipped loose for field installation. Mini C-10 Includes solid state one minute timer with automatic stop, terminal blocks indicator light, fuse and push button control to activate cleaning cycle, in a NEMA 4 enclosure [115VAC/1/60]. Motor starters not included. Shipped loose for field installation.

Automatic Overfill Control System

The Griffin Overfill Control System, consisting of a closing valve, limit switch and control panel, completely automates silo filling and venting while preventing overfill and resulting damage. It is designed to operate on any pneumatic silo filling system with any number of fill pipes. If the high bin signal is clear when the trucker connects his hose to the fill pipe, the butterfly valve will open and the silo will accept material. When the high bin indicator is activated, an alarm will sound telling the trucker to stop his unloading operation. In 90 seconds the butterfly valve will close, sealing off the fill pipe and making it impossible for the trucker to continue pumping in material. The bags in the dust collection system will then automatically shake.