A friend in a german news group asks, what the abbreviation "PBP" on a ball valve means. Finally he wants to know the manufacturer. He thinks, it is an american product.
If it is PBV and your friend is in Europe it is more likely to be "Pibiviesse" in Italy. This was the Original "PBV" valve. Zydell (Zytec) were their distributor many moons ago but there was some kind of dispute over the use of the name and PBV (the Italian Co) became Pibiviesse whilst Zydell continued with the PBV name. Their Web Site is