OK, I'm absolutely stumped!!

What are the main cause of a Burkert valve not firing?

I've done the obvious:

- Check on a change of state of the relay (It's being switched between 0 and 34v ish)
- Check the buffer tank is under pressure (30bar)
- Check solenoid is 24v DC (yep)
- Pointy arrow thing showing flow pointing towards ram (yep)

So, press button and get absolutely nowt. It's a brand new valve.

Is there anything perculiar with these valves which I need to do to make it work?

Andy

......................Sits back and awaits Clives response about not knowing what I'm doing