Barrel valve breakage ??

I'm having an issue with the Barrel valve breaking off at the mount point. This is the second time.
Enderle K style valve bolted to a Hilborn Shotgun hat.
The first time I had had some tire shake and chalked it up to that. I bought another housing and transferred the internals to it.
Made a couple of shake free runs and bam! another breaks on the burnout.
I'm at a loss as to what is causing this.
Car is real soft on the launch at 1.05 best ET is 6.60 207
I run a soft line to both the hat and port distribution blocks. I have seen both soft lines as well as hard lines being used.
I have talked to others with the same setup and no problems.

Any ideas please?

 

Is the line from the pump in tension?

 

Kosky racing. No there is some slack on all of the lines.

 

Maybe posting a picture of the barrel valve mounted and where it's broken would help

 

Check your morse cable..

 

Make sure your pedal stop hits first-if not it can rip the valve off the injector

 

Reviving an old thread.
I have no idea hy two of these K style broke.
I have changed to a cube and it is holding up so far.
Thanks for all of the response