Satchwell 2 port replacement help - wiring

[gassafe]

Gotta replace this ancient 2 port... Is it compatable with a modern 28mm Honeywell 2 port, can't find anything online! Wiring is obviously different according to the label!

It's a satchwell 2 port on the cylinder return, the boiler is floor standing gravity set up where the boiler only fires with hot water etc if that's relevant...

 

[Frog67]

difficult to say without knowing how the system has been wired, but may not be too far off the mark.
Just for your consideration
White not used
Orange to boiler live
Brown to cylinder stat call for heat
Grey to programmer/time switch
Blue neutral
Earth

 

[leesparkykent]

Sounds like a C-plan

 

[jonnyswamp]

Is the valve body OK, if so just replace the actuator head like for like
Motorised Zone Valves

 

[gassafe]

Is the valve body OK, if so just replace the actuator head like for like
Motorised Zone Valves

I'd like to but the danfoss (sunvic) valve I have has different wiring too...