Have the VZ22, VZ32, VZ42 valves been replaced by the VZ219, VZ319, VZ419 series?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
As per PA-00911 the VZ22, VZ32, VZ42 series valves are no longer available for sale.The alternative is the standard catalogue zone offer, either the VZ*08* with MZ140 for thermal (low cost, silent) solutions, or the VZ*19* with MZ20 for a Motoric actuator solution.
The alternative range VZ*08E or VZ*19*, is lower in cost and would be a suitable replacement in most applications.
For high pressure applications, the VP228E PIBCV would be a suitable alternative. There should be no technical concern with changing over a PIBCV from a zone valve if the system pressure is above 25 kPa.
There will be slight dimensional differences in the zone valve body length but for most installations the existing pipework should be able to accommodate the difference.
A cross reference from the discontinued offer to the new offer is detailed PA-00911.
Datasheets for all valves and actuators can be found here or here for MZ18A, MZ18B, MZ20A, MZ20B, VZ*19*