Construction features of pumps RV + RNV
RVB pumps are generally found combined with initial stage pumps and condensers arranged in series, although the latter is less frequent. The drive shaft of Roots pumps is activated directly by the motor axle through a flexible mounting. The entry of the drive axle is sealed by locking segments with an oil chamber, and also includes a cooling chamber to eliminate heat produced by the closure.
The seals and other elastomers are made from fluoroelastomer VITON. The RVB type is equipped with standardized flange-mounted motors operating on alternating triphasic current in compliance with IEC regulations.
