New: Tyr Roots blowers from Busch
The Roots blowers have the brand name of Tyr and are available as both a vacuum version with differential pressures of up to 500 millibars and an over pressure version with differential pressures up to 1000 millibars. The range of six different sizes cover volumetric flows from 2.5 to 73.0 cubic metres per minute.
Tyr Roots blowers are extremely compact and feature high-performance three-lobe blower stages. The high efficiency motors that are tailored precisely to the operational requirements and the use of energy-saving motors (EFF1) make Tyr Roots blowers highly energy-efficient over other pressure or vacuum generators. Tyr Roots blowers operate at low noise levels thanks to their innovative silencing concept that makes the Tyr, depending on the version, on average 4 to 5 dB(A) below the noise levels of comparable blowers on the market. Thanks to the non-contact compression, no operating fluid is necessary. Service is limited to routine work that can be carried out easily from the front of the blower. Monitoring of the filter, oil level, and operating pressure is simple via displays mounted directly on the blower or the acoustic enclosure. Tyr Roots blowers can be installed with and without acoustic enclosures.
Tyr Roots blowers can be used for all applications in industry that require vacuum or over pressure. Their principal areas of application are for pneumatic conveying systems, food technology, the plastics industry and environmental technology. The wide range of sizes and motor variants and the extensive accessory programme means Tyr Roots blowers can be individually and precisely adapted to any application.
(July 2010)
Degassing units for extruders | Plastex vacuum systems for optimum degassing when extruding
Busch has developed its Plastex vacuum systems especially for degassing the screw section during extruding. They suck up the created gasses and vapours in the screw section of the extruder and therefore play an important role in achieving the required product quality. These vacuum systems are dry-compressing: they do not use any operating fluids such as water or oil. The Mink claw vacuum pumps used in the process work in a non-contact manner and are therefore non-wearing and with low maintenance. A flushing device is integrated for cleaning the compression chamber in the vacuum pump.
Six sizes of standardised Plastex vacuum systems are available for degassing during the extrusion of PMMA, PA, PE, ABS, HDPE, CDPE, PVC, PP and many other plastics. The Busch engineers in the 'Plastic Competence Centre' see the standardised vacuum systems as basic components with which they can design and configure tailor-made degassing systems to perfectly suit the process conditions at the customer's site. Plastex vacuum systems are delivered ready for connection and consist of a Mink claw vacuum pump, an upstream filter system, an exhaust pulsation damper, a flushing device and a switch and control cabinet. The entire Plastex vacuum system is compactly mounted onto a base frame.
As alternatives to Mink claw vacuum pumps, Busch also offers individual Plastex vacuum systems with Dolphin liquid ring vacuum pumps, COBRA screw vacuum pumps and R 5 rotary vane vacuum pumps. With large suction volumes, roots vacuum pumps are also used.
Alongside the right choice of vacuum pump, the separation technology in the extruder degassing plays a significant role. Busch has various separator types and
sizes available so that the separator technology can also be specifically configured to the extrusion process during the design of a Plastex vacuum system.
(June 2010)
New Dolphin liquid ring vacuum pumps
Busch has introduced a brand new series of liquid ring vacuum pumps to the market: the Dolphin LX series is made up of eight different pump sizes of single-stage liquid ring vacuum pumps in block construction, that reach ultimate pressures of 33 hPa (mbar). The suction capacities cover a range of 25 to 455 cubic metres per hour.
All pump sizes of this new generation of liquid ring vacuum pumps are fitted with an impeller made of stainless steel. The pump sizes from 75 to 220 cubic metres per hour are also available as completely stainless steel versions. Thanks to the choice of materials and the extensive accessories programme, the Dolphin LX vacuum pumps can be deployed brilliantly in all areas of industry, even in critical applications. Combined with a gas ejector, ultimate pressures of 8 hPa (mbar) are reached. You can basically choose between three different operating modes: with the re-circulation system, the operating fluid is permanently fed and discharged together with the process gas. When the circuit is open, the operating fluid collects in a downstream container, where it is separated from the gas and then fed again to the vacuum pump. At the same time, fresh operating fluid flows into the vacuum pump. When operating with the closed circuit, the operating fluid is also collected in a downstream container and separated from the gas, after which it flows through a cooler before being fed back to the vacuum pump. When the circuit is closed, hardly any operating fluid is lost.
(April 2010)
Dolphin liquid ring vacuum pumps with high suction capacities
The new Busch Dolphin liquid ring vacuum pump sizes can now reach suction capacities in excess of 10,000 cubic metres per hour. The extension of the Dolphin LA/LB series means that the available product range comprises of 21 different pump sizes from 50 to 10,900 cubic metres per hour. In order to achieve optimal ultimate pressure adjustment matched to the demands of the process the vacuum pumps are supplied in two designs: Dolphin LA liquid ring vacuum pumps are single-stage and reach ultimate pressures between 120 and 150 mbar, depending on the pump size. Due to its two-stage design, the Dolphin LB version can reach ultimate pressures of 33 mbar.
Dolphin liquid ring vacuum pumps are used as individual units and in vacuum systems in many industrial sectors. You can basically choose between three different operating modes: with the re-circulation system, the operating fluid is permanently fed and discharged together with the process gas. When the circuit is open, the operating fluid collects in a downstream container, where it is separated from the gas and then fed again to the vacuum pump. At the same time, fresh operating fluid flows into the vacuum pump. When operating with the closed circuit, the operating fluid is also collected in a downstream container and separated from the gas, after which it flows through a cooler before being fed back to the vacuum pump. When the circuit is closed, hardly any operating fluid is lost.
Dolphin liquid ring vacuum pumps are available in a variety of materials. This means that the appropriate materials or material combinations can be used for all process media. Dolphin LA/LB vacuum pumps are also available in an ATEX-certified version for category 1(i)/2(o)G IIB+H2 T4.
The main fields of application for these vacuum pumps are in the oil and gas industry, the chemical and pharmaceutical industry as well as in plastic processing.
(March 2010)
