The valves to membrane are planned in order to distribute material of lower-middle viscosity with a high degree of precision and doses of varied form and dimensions till fractions of microliter. The closing to motivating force assures the compatibility of the valves with the telephones exchange time/pressure. The short race of opening concurs the positive and fast closing of the valve. The metal ring of regulation of the race allows specifies settaggi of the dimension of the dose to distribute. The compact design with assembly geometries is horizontals that vertical concur great flexibility and facility of integration in the automated applications. The room of the fluid is in polyethylene to highest molecular weight (UHMWPE) for the majority of the applications, but he is available also in Teflon® for requirements of chemical compatibility and in Delrin® for UV. A version in stainless steel is moreover available (5622VU-DVD), with circuit of the fluid optimized specifically for the adhesive ones to polymerization UV, rendered of it and enamels used in the production of DVD and CD. The valves demand little maintenance, are easy to use and concur a fast substitution of pieces of reciprocation. The valve is available also in the palm version with commando to manual lever.