ppr ball valve 1) DIN 8078 / 8077 2) Healthy and non-toxic, bacteriological ... valves Models and specifications:1) B21 (stop valve): D20, D25, D32, D40, D50, D632) B33 (ball valve): 1/2" x D20, 3/4 ... D40, 1/2" x D50, 1" x D633) B29 (concealed valve): 1/2" x D20, 3/4" x D25, 1" x ... D40, 1/2" x D50, 1" x D634) B30 (concealed valve): 1/2" x D20, 3/4" x D25, 1" x ...