What is ConTran™ Continuous Dense Phase technology?
ConTran™ technology is the fourth generation evolution of continuous dense phase conveying of dry bulk materials. This technology is based on maintaining the material-to-air flow ratio at a pre-selected (material dependent) constant, thus creating and sustaining dense phase, low velocity, gentle action 'wave-form' flow.

1st generation
First generation focuses on using variable speed drives on blowers and airlocks. While these can be partially effective in reducing conveying velocities,the conveying system still operates in dilute phase in terms of material-to-air ratio, pressures and velocities. Material degradation remains significantly higher than in dense phase flow.

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	KEY FEATURES
	Self-cleaning transfer system, no cross contamination Testing facilities Minimizes creation of fines & brokens Convey rate & transfer route flexibility Rate, batch integrity, & degradation guarantees Cost effective

2nd & 3rd generation
Second generation focuses on the use of different valves and sonic nozzles. Positioned downstream of the blower or air compressor, they function to choke and vent excess air or pressure in order to maintain a constant material/air ratio. This can create wave-form flow effectively, but usually is unable to sustain it because of its inherently slow control response time.

If system interruptions occur in quick sequence, these controllers are unable to compensate quickly and allow secondary interruptions to take place. The slugs then tend to disentegrate, while system pressure rises. Once again, material degradation increases.

4th generation
ConTran™'s fourth generation technology uses the ConTran™ Air Controller, positioned upstream of the blower. This causes the vacuum level to vary, which modifies the density of air entering the blower. This compensates for 'system interruptions' by decreasing / increasing the air mass in the system, thereby maintaining the material-air ratio at a pre-selected constant throughout the conveying period.

ConTran™ has a significantly faster response time and there is no excess air or pressure that needs to be vented. Advantages include:

• Ability to convey to the full operational range of P-D blowers. For high transfer rates and/or long distances, this enables us to provide blower-powered systems as opposed to expensive compressor-powered alternatives.
• Up to 30% higher transfer rate with the same blower and motor combination
• Up to 30% energy savings
• Consistently lower material degradation
• Quick material changeover, self-cleaning and no cross-contamination

High-efficiency rotary valve
The ConTran™ system uses a high-efficiency rotary valve which feeds material into the system and provides for minimal air leakage and pressure loss. Since the airlock and air controller's mass flow displacement match, together they compensate for air leakage.

Expansion chamber
An expansion chamber has been incorporated into the system design, allowing air to be relieved in two phases. First, it is released into the smaller chamber, then into a larger filter receiver or silo hopper. A backpressure inducing elbow is often used just before the first chamber to further reduce the chance of material blowing out when exiting the convey line.