this kit bridges the gap between modern Schneider Electric actuators and Robertshaw V6xxx series or Uni-Line 256x series valves ranging from 1/2" to 2" in size

The 060255 is the direct 070278-11 replacement

Does this include the head gasket

What causes this collector box cover to fail

Armstrong Fluid Technology 805209-000 Flange Gaskets 322838-752 this kit bridges the gapThe Armstrong Fluid Technology 805209 000 Flange Gaskets are precision engineered OEM replacement parts designed to maintain the peak efficiency of your hydronic pumping systems. Specifically developed for use with Armstrong S35 pumps and the wider Series S circulator line, these gaskets provide a critical, leak proof seal for 2" and 2 1 2" flange connections. Constructed from durable, high performance materials including high density composite