Push type QDV explained.
Posted: Mon Aug 13, 2012 3:13 pm
At the request of airatomic I decided to scetch up a drawing of how my counterbalanced hammervalve works.
Basically it is a push type QDV.
It could be scaled up quite a bit and could be made to perform just as well as the pull type.
The biggest difference I see is the flat seal.
This will prevent wear and O-rings popping out but it could also be a headache to closely match seal diameters.
That of the flat front and the O.D. of the O-rings.
The flat seal ( and seat) could be made slightly larger ( just a fraction!) to ensure a firm seal but especially in large scale this will need a bigger push to open.
You might have to use a sledgehammer if you mess it up big time...
Anyway..
Not so different from poking a stick down the barrel of the pull type QDV is it?
Just redirect the air to the barrel with a Tee, or connect the barrel itself to the rod if you like..
The low pressure zone could also just run straight to atmosphere( keep that piston from popping out!!)
I'd prefer a spring to reset the thing..
Basically it is a push type QDV.
It could be scaled up quite a bit and could be made to perform just as well as the pull type.
The biggest difference I see is the flat seal.
This will prevent wear and O-rings popping out but it could also be a headache to closely match seal diameters.
That of the flat front and the O.D. of the O-rings.
The flat seal ( and seat) could be made slightly larger ( just a fraction!) to ensure a firm seal but especially in large scale this will need a bigger push to open.
You might have to use a sledgehammer if you mess it up big time...
Anyway..
Not so different from poking a stick down the barrel of the pull type QDV is it?
Just redirect the air to the barrel with a Tee, or connect the barrel itself to the rod if you like..
The low pressure zone could also just run straight to atmosphere( keep that piston from popping out!!)
I'd prefer a spring to reset the thing..