#5 give a good answer. . ]" A, S) J2 d6 q J& ? ! s L. V9 d& B' w7 @cause different pressure areas , we can just apply a small pressure to enable the poppet out 6 B; j8 X& t8 `( K) D
8 o- L) q" Q! T: `3 q, b6 t6 C/ dit should be a two stage valve. a little bit complex kind. once you get its working function. then it is easy for. u