LED current is too low, refer to datasheet specifications. 10 nF doesn't involve much snubber effect. It may be problematic to use a zero crossing switch with mostly inductive loads like solenoids.
Hi,
Sorry previously i did not know about zero crossing concept so only i asked how it will affect the solenoid loads. I think you may be busy with your work so only you did not reply.
As you told that zero crossing may be problematic for solenoid valves, i then started to search about zero crossing circuits and now i understand how zero crossing may create problem for solenoids. So i decided to go with the opto coupler MOC3021.