Spout Types and Configurations

  Depending on process requirements and physical properties of product, loading spouts are available with extensive range of spout configurations. Proper selection of configuration is essential for efficient and dust-free loading.  

Single Outer Bellow

Single outer bellows provide economical solution for low dust content, granular material loading operations. There exists one spout that maintains the confined region in the system. Product flows downward through this spout and any dust is collected upwards within the same region.

Loading spout with single outer bellow fabric

Double Bellows

There exists one outer bellow and one inner bellow in this configuration. Product flows through the inner spout downwards and dust is collected through the region between two spouts upwards. As two opposite flows are separated, product loading capacity and dust collection efficiency are increased. The dust collection system is connected to the region between two spouts. Collected dust is sent back through this region again.

Double bellows inner and outer loading spout for dust collection

Single Outer Bellow With Internal Wear Cones

Wear cones are used to protect bellows from abrasion caused by flow of bulk solids. They are installed at the center of loading spout. Main stream product flow is separated from spout by wear cones. Flowing material does not have contact with spout fabric. Depending on the physical properties of product different type of wear cones are available. While carbon steel cones are suitable for wide range of bulk solids, hardox steel cones are needed for highly abrasive materials. For food products and corrosive materials stainless steel cones are preferred. In high temperature loading applications, wear cones serve as a heat barrier to protect spouts.

Single outer loading bellow with wear cones abrassion resistant loading spouts

Double Bellows With Internal Wear Cones

Inner bellows can be used to cover internal wear cones. This design both protects bellows from abrasion and provides efficient dust collection with rapid product loading. Bulk material flows through the wear cones inside the inner spout downwards and dust is collected through the region between two spouts upwards.

Double bellow with abrasion resistant wear cones bulk solid loading spouts

Loading Spout Selection Chart

Following chart can be used to determine possible loading spout configurations for different applications and conditions.

  Loading spouts bellow type selection chart diagram    

Heavy Duty Loading Spouts


Single Loading Chute

Telescopic loading chutes are used for high capacity and/or high temperature powder loading to trucks, ships and stockpiles. They are composed of large diameter telescopic steel pipes controlled by winch mechanism. These pipes are used to provide large inner space for easy discharging of powdered material and isolate it from the surroundings.

Telescopic chute loading spout pipe

Single Outer Bellow With Internal Loading Chute

An outer bellow is used in this telescopic chute configuration to provide closed containment. Any dust leakage is prevented during material flow. Dust collection system connected to flexible dust skirt at the bottom are utilized capture fugitive dust.

Telescopic loading pipe outer loading dust collection spout

Loading Chute With Double Dust Collection Bellows

For high capacity loadings of high dust content materials, flexible dust skirt size is increased. Two bellows are installed at the sides of telescopic chute piping. These two bellows are used to collect higher dust content. Large scale jet filter type dust collection systems are used to prevent any dust emission to the environment.

clinker loading telescopic chute with double dust collection spouts