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ROOTS BLOWER- A POSITIVE DISPLACEMENT MACHINE

CENTRIFUGAL BLOWERS & FANS: This Range covers various types of Centrifugal and Axial Flow Fans, which have relatively high air displacement but low compression ratios. They are either of Centrifugal type, Axial flow types or Regenerative types. As their internal clearances are relatively high, the discharge pressures are limited to few inches of water only. These types are generally used for applications requiring high volumes but low pressures such as in Air-conditioning, in furnaces, Low pressure Cooling, Dust or Fume extraction systems, lean phase pneumatic conveying etc POSITIVE DISPLACEMENT BLOWERS (Roots Blowers):- Twin Lobes and Three Lobes type Blowers fall under this category. They have higher POSITIVE DISPLACEMENT BLOWERS (Roots Blowers):- Twin Lobes and Three Lobes type Blowers fall under this category. They have higher efficiency at moderate compression ratios and are most efficient in the compression ratios of 1.1 to 2. They find use in applications, ...
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LASER PUMPING

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Laser pumping A ruby laser head. The photo on the left shows the head unassembled, revealing the pumping cavity, the rod and the flashlamps. The photo on the right shows the head assembled. Laser pumping   is the act of energy transfer from an external source into the   gain medium   of a   laser . The energy is absorbed in the medium, producing   excited states   in its atoms. When the number of particles in one excited state exceeds the number of particles in the   ground state   or a less-excited state,   population inversion   is achieved. In this condition, the mechanism of   stimulated emission   can take place and the medium can act as a   laser   or an   optical amplifier . The pump power must be higher than the   lasing threshold   of the laser. The pump energy is usually provided in the form of light or   electric current , but more exotic sources have been used, such as ...
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