Dilute Phase Negative Pressure ( Vacuum ) Pneumatic Conveying Systems

We are Manufacturer, Supplier, Exporter of Dilute Phase Negative Pressure ( Vacuum ) Pneumatic Conveying Systems and our setup is situated in Pune, Maharashtra, India. Negative pressure system are commonly used for drawing material from multiple sources to a single point. There is little or no pressure difference across the feeding device and so multiple point feeding into a common line presents few problems. As a consequence, the feeding feeding device can be a very much cheaper and simple item in a negative pressure system than in a positive pressure system Negative pressure ( vacuum ) is generally used to convey material from multiple sources such as storage vessels, process equipment, trucks and rail cars, to individual or multiple destinations. Vacuum systems are excellent for multiple product inlets through the use of simple diverter valves; however, it becomes costly to have multiple destinations because each must have its own filter receiver with partial vacuum capability.

Negative pressure systems generally use positive displacement ( roots type ) exhausters providing up to 50% vacuum to convey materials through a pipeline to the destination where the air and product are separated at a receiving vessel with a filter, or a cyclone.

The product enters the convey line directly, or if metering is required, via a special feeding device such as a rotary valve or screw feeder. The conveyed product is discharged from the receiving vessel either on a continuous basis by a rotary airlock or intermittently by valves to surge hoppers, storage vessels or other discharge points.

In vacuum conveying, no moving parts contact the materials and no dust can escape into the atmosphere. Because of this superior leak containment, they are often specified on the basis of cleanliness, particularly when handling hazardous materials.

The drawback of this system is that if the loading is high or the length of the system is large, the components must be designed for high vacuum. This adds cost to the components and must be considered when comparing methods of transport.

Vacuum conveying systems are particularly suitable for systems which convey materials at low to moderate capacities over medium distances, from multiple points to a single destination. These systems are versatile and adaptable for different materials and the low operating pressures allow lower cost pipelines and fittings. This method is frequently used for central vacuum cleaning systems and other applications, which require a reticulated network of vacuum pipes to convey product to a single collection point.