Elektror presents HRD high pressure blowers. They provide air flow up to 100 m³/min and a total pressure difference up to 17,300 Pa. The drive works via robust fan belt transmission (max. transmission ratio 1:2). They accelerates are up to approx. 6,200 rpm. The housing is made of cast Aluminium as well as the impellers, which primarily bent backwards. The blowers are mostly corrosion-resistant.