Safety valve for 50mm dust collection/vacuum systems (SShop DC)

Hi,

This is an safety valve for my workshop dust collection system based on 50mm pipes.
With this valve you won't incidentally destroy your installation when you forget to open inlet or clog your hose.

## What is it for?
This happened to me more then once, that I forgot to open blast gate and turned on the vacuum. It usually ended in crushing my plastic barrel - not permanently - but still a lot of additional work to straight things up.
Also while unseeing small devices like orbit sande