#5 give a good answer. / q3 n, E5 Q$ G0 h: k; J. w! _4 z0 a7 l& K( Q
cause different pressure areas , we can just apply a small pressure to enable the poppet out 9 ?# B5 H% N8 \. ] 7 b* B* |% {5 j. E4 [it should be a two stage valve. a little bit complex kind. once you get its working function. then it is easy for. u