Pneumatic Conveying Diverter

Pneumatic Conveying

What is a Pneumatic Conveying System?

A pneumatic conveying system is an industrial bulk material transfer technology that transports dry bulk materials (like cement, fly ash, flour, plastic granules) from one point to another through pipelines safely and in a closed circuit using compressed air or vacuum.

Working Principle: Materials are pushed or vacuumed through the pipeline by the kinetic energy of pressurized air supplied by blowers or compressors.
Dense Phase Conveying (Denseveyor): Transports material in plugs through the pipe at low air velocity and high pressure, minimizing wear and dust generation. Ideal for fly ash and cement.
Dilute Phase Conveying: Efficiently transfers light particles in a continuous suspended flow using high air velocity and low pressure.
Advantages: Ensures zero dust emission and product loss due to its entirely enclosed design. Offers virtually zero maintenance costs compared to mechanical conveyors.

DUCON PNEUMATIC CONVEYING DIVERTER VALVE(MDV)

To divert a conveyed material stream into two pipelines in high - or low - pressure conveying systems

MDV VALVE Areas of application

The conveying diverter valve TYPE MDV is a two-way diverter valve for application in pneumatic high- and low-pressure conveyor systems. Suitable for conveying of dry, non-caking bulk goods from powdery up to abrasive. Because of variable sealing materials, bulk goods with temperatures up to 180° C can be conveyed without problems. The material cushion accumulation during dense stream conveying transfers the wear zone into the material cushion away from the valve walls.

Operation A shifting swivel arm distributes the bulk goods. The swivel arm is equipped with a gasket cone with easily exchangeable gaskets. Sealing is effected against hardened interior rings. Shifting is achieved via a pneumatic or electro-motoric swivel drive. Swivel drive with limit switches for position indication.

Pneumatic swivel drive with 5/2-way impulse magnetic valve guarantees secure operation - even during power outage.Material/design Housing: grey, nodular-cast iron or stainless steel casting Swivel arm: nodular- or stainless steel-cast iron Sealing ring: rubber, silicone, viton Painting: hammertone, silver-grey

Technical data Pneumatic swivel drive:

Operating pressure: 7 bar Control pressure: 5 bar Limit switch box with mechanical limit switches, Solenoid valve voltage: 24 V DC/24 V AC/ 230 V AC As control valve a 5/2-way impulse magnetic valve is used. Pneumatic actuator swivel drive: Operating pressure: 10 bar Voltage: 24 V/AC or 24v/dc Limit switch box with mechanical limit switches, made by Schmersal Hand-drive: with hand swivel lever

Operating pressure: 7 bar Advantages

· Material cushion formation during dense stream conveying

· Wear zone diverted into the material cushion

· During power outage the swivel arm remains in the selected position

· Sealing rings can be exchanged without disassembly during shortest stoppages

· Pressure tight, even in the low pressure area

Where does it fit best?

Pneumatic conveying is a strong option for cement, fly ash, mineral powders, and fragile bulk-solids transfer where closed handling matters.
On long routes, multi-turn lines, and silo transfers, it can offer a more compact solution than mechanical conveyors.
Where dust control and housekeeping matter, it supports a cleaner process environment.

Selection criteria

Particle size, bulk density, abrasiveness, and fragility are core design inputs.
Line length, bend count, air velocity, and pressure regime must be assessed together.
The choice between dense and dilute phase should balance energy, wear, and product integrity.

Operation and maintenance notes

Feed stability, airlock selection, and line build-up behavior should be monitored routinely.
Bend wear, plugging tendency, and blower/compressor loading are the main maintenance themes in the field.
If velocity is too high, wear rises; if too low, build-up and plugging become more likely.

Frequently Asked Questions

How do you choose between dense and dilute phase?

The decision depends on material sensitivity, line length, wear expectations, and the required transfer regime.

Is pneumatic conveying suitable for every material?

No. Material flow behavior, fragility, and tendency to build up all affect whether pneumatic transport is the right fit.

Which components deserve the closest maintenance attention?

Feed equipment, bends, airlocks, and the blower/compressor package usually need the closest monitoring.

Quick Info

Closed-line design helps reduce dust leakage and product loss

Material behavior and line geometry sit at the center of the design

Dense-phase and dilute-phase layouts answer different process priorities

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Pneumatic Conveying Diverter

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