Leybold Turbovac 90 i High-Vacuum Turbo Pump, DN 63 CF, 810041V1000

Leybold Turbovac 90 i (w/ DN 63 CF Inlet Flange) - Product Overview:

With the Leybold Turbovac 90 i high-vacuum pump, improving your industrial vacuum processes has never been easier and more convenient. The Leybold Turbovac 90-450i Series of industrial high-vacuum turbo pumps allows users to optimize pump down times and consistently achieve optimal pressures and gas flows. The 90i series pump is particularly designed to offer the best performance-to-size ratio among pumps within the ISO 63, 100, and 160 inlet size ranges. A defining feature of this product family includes a cutting-edge rotor along with drag-stage design, effectively resulting in high performance and unparalleled pumping speed, particularly for light gas varieties.

Turbomolecular vacuum pumps of the Turbovac 90i category are used in applications necessitating a clean high or ultra-high vacuum, particularly in fields ranging from research and development (R&D) to industrial fields incorporating the semiconductor industry, as well as analytical instrumentation and coating technology.

Leybold Turbovac i Series - Principle of Operation:

In principle, the turbomolecular pump is a rapidly-revolving turbine encased within a housing, where the rotor stages of the turbine are equipped with a number of rotor blades. Located between the rotating blades are stationary stator disks, with blades arranged in the opposite direction. By means of a momentum transfer from the rotating rotor blades to the gas molecules, the initial non-directional thermal motion is transformed into a directional motion, from the inlet flange of the pump in the axial direction toward the forevacuum (outlet) flange. Within the molecular flow range (i.e. at pressures below 10^[-3] mbar (0.75 x 10^[-3] Torr)), the average free path of the gas molecules is larger compared to the spacing between the rotor and the stator blades (typically a few tenths of a millimeter). Correspondingly, the interior molecules collide chiefly with the optically-dense rotor blades, resulting in a highly-efficient pumping mechanism. In the laminar flow range (i.e. at pressures over 0.1 mbar (0.075 Torr)), the effect of the rotor is impaired by frequent collisions between the molecules themselves. For this reason, a turbomolecular pump is not capable of pumping gases at atmospheric pressure ranges.

Leybold Turbovac 90 i Pumping Speed:

Rotor Bearing:

Leybold offers a variety of rotor-bearing systems. Among these are a purely classic mechanical-type rotor bearing (Turbovac), a magnetic rotor bearing (Turbovac Mag) as well as a hybrid bearing (Turbovac i/iX). Regarding the latter, the bearing on the forevacuum side is a ceramic ball bearing lubricated for life, whereas the bearing on the high-vacuum side is implemented by way of a non-degrading magnetic bearing. A typical feature of these bearings is that they do not require lubricating oil. An advantage of this dry feature is that, under circumstances during which the pump engages in standstill, lubricant oil might otherwise diffuse back into the vacuum chamber due to the lack of any pumping action. With dry bearings, the risk of oil diffusion is fully eliminated.

Drive Electronics/Control Unit:

Driving and monitoring the turbomolecular pump requires an electronic frequency converter (inverter). The frequency converter delivers the driving voltage and output frequency for the motor while simultaneously monitoring the system. Optimum run-up of the pump rotor is attained through a steadily-increasing voltage and frequency feed. After attaining the nominal speed, the start-up current is reduced in a controlled manner until reaching the level necessary for normal operation. The frequency converter and the Turbovac motor have been designed for a minimal drop of speed, even at high intake pressures. This ensures that the highest-attainable gas throughput is realized while within the transition range from molecular to viscous flow. Depending upon the given system and installation conditions, the control unit may be supplemented with a comprehensive range of optional accessories, facilitating easy integration within existing installation procedures.

Forevacuum Pump:

Since turbomolecular pumps are not capable of compressing directly against atmospheric pressure, their operation will always require a sufficiently-rated forevacuum pump. For the classic rotor arrangement with rotor blades, two-stage rotary vane pumps (Trivac) will generally be suitable. In some cases, single-stage rotary vane vacuum pumps (Sogevac BI) or scroll vacuum pumps (Scrollvac) will also prove suitable. Additionally, in cases where the rotor is equipped with an additional compression stage (a compound stage), diaphragm vacuum pumps (Divac) may be utilized.

Leybold Turbovac 90 i Dimensions:

A&J Vacuum Services offers full repair and service of Leybold Turbovac 90i High-Vacuum Pumps, along with all other brands of Leybold Turbo Pumps offered on our website. Please contact us for more information about our service and repair program or click http://www.ajvs.com/service.php to access our services page. We also offer emergency service upon request. For more information, please email A&J Vacuum Services at info@ajvs.com or call (973) 249-0854. Thank you for choosing AJVS as your supplier.