Have the VZ22, VZ32, VZ42 valves been replaced by the VZ219, VZ319, VZ419 series?
VZ*19* zone valves now available with equal or better specification than the older VZ*2 valves
VZ22, VZ32, VZ42 series valves are not obsolete. They will continue for the foreseeable future alongside the VZ219, VZ319, VZ419 series.
The key advantage of the VZ*2 series is that it will accept both thermal and motoric actuators whereas the VZ*19* series is motoric only.
The VZ*19* series is a cost effective alternative if motoric action is acceptable. It is designed to be used with the MZ20 actuator whereas the VZ*2 series uses the MZ18 actuator (motoric).
It is planned for the MZ18 and MZ20 to be replaced by a single self stroking, auto calibrated actuator from the end 0f 2013.