#5 give a good answer. ; B- c% e* f- f- c8 N" N4 Y/ ]$ M) S& k4 w" t$ u
cause different pressure areas , we can just apply a small pressure to enable the poppet out - m! ~& ^/ @; x' Q; M* P6 d. n* C& ], P0 ^! b* V
it should be a two stage valve. a little bit complex kind. once you get its working function. then it is easy for. u