I think this person is wanting to know about a ventilation valve design. My translator thinks the language is either Serbian or Croatian, but can't translate all the words. Anyone know the language? It seems the person may read English, so maybe he can translate.
If your bussiness is either design or production of valves and you want exchange your experiance with other people using ex-Yugoslav languages (serbian, croatian or bosnian) and english please reply to this message.