Stuffing gland and swa

I don't see why not for smaller sizes provided that the cable is well clipped as the stuffing gland will be much less robust than a normal gland.  I would also cut the armour back (I assume its not needed for CPC) to just outside the gland and cover the sheath, exposed armour and inner sheath with a thick heat shrink ideally adhesive lined.  That way the stuffing gland wont force the armour into the sheath/ insulation.  You will need to take special care with the way that the armour is cut to avoid jagged / bent ends which will cause more trouble than usual.

It all rather depends what you are doing with the armour and the CPC for the circuit - in extremis you could have 2 stuffing glands on at each end  and comb the armour into an earth terminal, electrically fine, though the purists may tut a bit. The equivalent for SY is common.

IF the armour is the main CPC, you need to ground it at both ends in a way that is good enough for the max fault current. If the CPC is elsewhere and the armour is just there to fire the RCD if a garden fork gets the cable, then earthing at supply end may well be enough. Indeed  if you are creating a TT island, it may be a deliberate choice not to continue the armour on arrival.

It’s only a 110v actuator valve with an core as a cpc. So best bet cut armour back and insulate is insulation tape really bodge job?

If there is nowhere to terminate the armour and it is earthed solidly at the other end, as there is another CPC then by all means cut it back so that it ends just inside the gland body. The one thing the thin PVC insulating tape probably should not be relied upon to do is be the sole insulation, at least not if it is going to be there for a few years. Heatshrink sleeve (the glue lined sort) or self amalgamating tapes are better, as  they tend not to come unstuck in the same way. Equally back in side the body of the gland it cant go anywhere.

It does however make me wonder what sort of cable the makers intended the vave  for - presumably not SWA.

Thanks guys yep you’re probably right. I think they must have replaced the valve and not thought about it’s termination. They decided to terminate it using swa and some sort of reducer with a plastic nut. All I can do is make good of what is there ?

OMS The way the valve comes it’s got inserts for the plastic nut to fit so the armoured brass nut won’t be able to be terminated to the valve body properly.

Can you not make off into an adaptable box or conduit through box and then Hi Tuff flex or flexi conduit from there to valve?

Agree, terminate SWA into an adaptable box, then out of the box with some flexible cable. Much better, especially if the valve unit is susceptible to vibration.