Mapro International S.p.A. products

Operating principle: The MAPRO® vacuum pumps, BV series, are rotary vane machines, oil recirculating type. In these vacuum pumps a cylindrical rotor turns eccentrically in a cylindrical stator of a larger diameter: the free space left between stator and rotor is half-moon shaped. Three slots are milled in the rotor and stratified plastic blades slide freely into the slots. The blades, as the rotor turns, are forced out against the cylindrical wall of the stator by centrifugal force, so creating individual “cells” whose volume changes continuously during the rotation.

The MAPRO® centrifugal fans, MCF Series, are made of: an intake duct conveying the aspirated gas to the impeller inlet, which is coaxial to the shaft, a closed impeller with axial flow inlet and radial flow exit, a toroidal discharge volute with tangential exit. The compression of the gas occurs through the increment of kinetic energy given to the gas by the vanes of the impeller and the subsequent conversion of the kinetic energy into static pressure in the discharge volute.

Operating principle: The side channel blower and the TBT increase the pressure of the aspirated gas by the creation, in the peripheral toroidal channel, of a series of vortexes caused by the centrifugal thrust of the impeller. While the impeller is rotating, the vanes force the gas forward and, because of the centrifugal thrust, outwards, producing a helical motion. During this motion, the gas is recompressed repeatedly with a consequent linear pressure increase along the length of the channel. The rotating TBT and toroidal channel are extremely innovative, born form a long research and trial. The impeller’s wing profile vanes and the central core channel allow this machine to achieve performances close to those of rotating lobe positive-displacement blowers.

One stage of a MAPRO® multistage centrifugal blower is generally made of: an intake duct conveying the gas to the impeller inlet, which is coaxial to the shaft, a closed impeller with axial flow inlet and radial flow exit, a radial diffuser, whose aim is to convert kinetic energy into static pressure at the impeller exit, a discharge volute.

MAPRO® Positive Displacement machines, ML Series, consist basically of a pair of Tri-lobe rotors, mounted on parallel shafts, rotating in opposite directions inside a roperly shaped casing closed at the ends by side plates. The two Tri-lobe rotors are synchronized by a pair of timing gears. As the rotors rotate, air is drawn into the inlet side of the casing, is moved from the inlet to the outlet side by the free volumes between rotors and stator and finally is forced out of the outlet side against the connected system pressure. The machines, being positive displacement type, do not develop pressure within the casing but the discharge pressure depends only upon the connected system esistance.

MAPRO ® International is the exclusive distributor for Italy of SECOH membrane blowers. In the rest of Europe these blowers are distributed by the Bibus group.