It is a revolutionary hydraulic system for elevators which don't need to use any throttle. It consists of an inverter that controls oil's flow, which is pumped directly from the VVVF motor both upwards and downwards.
Using this system we obtain:
in accordance with the european directive ΕΝ 81-2 : 1998 + Α3 : 2009
The valve RG.A3 ( /210 & /380) is being produced in accordance with the European Directive 81-2 : 1998 + A3 : 2009.