The "v" in Dutch close to the "f". Check out the letter "F" here http://www.dutchgrammar.com/en/?n=SpellingAndPronunciation.22
I've been studying Dutch for well over a year and I hear no distinction. :/ I barely hear a distinction between "v" and "w" in conversation and when I had a Dutch person try to teach me, it was fruitless. They both sound like a "v" even in the alphabet. Interestingly though, in English, he does not make a distinction between the "f" and "v" at the beginning of words. For example, "veterinarian" sounds like "feterinarian". So perhaps the "v" and "f" are so close that using one for the other would not change the meaning of the word.