ITWOST I have piston hybrid... its 50kg of steel
Sorry, but no pics yet.
Piston diameter is 110mm (port=90mm), piston made from aluminium and 316ss M20 threaded rod.. it has sliding bearings made from bronze.
Chamber is about 5litres and its designed to take safely 200bar pressures. Chamber design is similar to hydraulic cylinders and chamber is made out of D160mm hydraulic cylinder pipe.
Im staying under 10X mixes.
Its designed for special testing purposes, so it has little different piston setup, its like toolies style pistonvalve.. I get very good flow with that valve.
(
http://www.spudfiles.com/spud_wiki/inde ... ston_Valve )
I start testing it now and hope to get some results in few days. I did tests with air and it worked very well
There is lot to it, so I will some day post the pics and all the info about it. If anybody really interested about pics then send me PM