SYSTEMSTAK Double PILOT OP. CHECK, D05 base, 20 gpm, excellent in holding a load in place once the directional valve is in neutral. Typically a float center valve is used in a pressure compensated circuit or a open center valve where all ports our open connected to tank in the center position.  If a valve is needed to hold the load due to safety concerns then it is better to have a valve plumbed directly to the cylinder, The reason this is done is to protect personal from a premature rupture of a hose, for example. A counterbalance valve can also be used in this type of application.