COMPACT CIRCULAR PRESSURE FILTER

Air–micronised-product separation and above-silo pressure-balancing unit

A compact round filtration unit for mounting on closed volumes — silos, hoppers and intermediate tanks where bulk raw materials, dust and granular products are stored — above all in the food and chemical industries and at all industrial plants. By flawlessly separating the high-pressure air arising during pneumatic filling or internal transfer from the micronised dust particles, it preserves the pressure balance of the closed volumes and eliminates environmental emissions.

WORKING PRINCIPLE

Closed-volume expansion management — dusty-pressure reception: when product is forced into a silo or hopper by pneumatic lines or mechanical conveyors, a high air pressure and a dense micronised-dust cloud form inside; this dusty air rises toward the round filter body. High-performance cartridge/bag filtration — micronised-dust separation: the special filter elements work in variations chosen for the process state and the raw-material character; as the dust-laden air passes through these elements, the micronised flour or chemical-dust particles are blocked on the outer surface with high dust-capture capability. High-air-permeability safe exhaust — stable pressure discharge: the air, fully cleared of dust, is released to the atmosphere through the filter’s high-air-permeability upper dome, while the raw-material particles held on the filter elements are shed back into the silo, permanently preventing internal product loss.

KEY ADVANTAGES

- High-efficiency air permeability and dust-capture capability: The filter’s engineering success rests on a high air permeability with low static resistance and an advanced dust-capture technology that catches even micron-level particles; it reliably prevents the silos from deforming under over-pressure.

- Process-character filter variations: According to the physical and chemical nature of the conveyed dust-granule raw material, the storage content and the plant’s moisture regime, it can be configured with cartridge, bag or pleated filter-element variations in different fabric qualities.

- Top-level material science for food and chemical plants: For full compliance with the sector’s hygiene and corrosion criteria, besides the painted-carbon-steel model option, it is also made entirely of AISI 304 or AISI 316 stainless steel, widely preferred on food and chemical lines, above all on flour silos.

- Compact round rigid-body design: The round chassis design spreads the pressure evenly over the body surface, raising mechanical strength; with its small minimal dimensions it offers easy mounting and practical maintenance even in tight spaces above silos and hoppers.

ENGINEERING NOTE

The small round pressure filter is a critical safety component of industrial storage systems, providing both environmental sanitation and silo safety. When exhausting from the silo the air created by blowers or fans in pneumatic-conveying systems, the filter elements’ filtration area (in $m^2$) and air-permeability indices are calculated to a precise balance. Our AISI 304/316 stainless-steel body options and optimised air-outlet geometry secure a safe, stable pressure-discharge regime in areas where flour dust could pose a static (dust) explosion risk (ATEX).