Porous glass base material manufacturing system and method for manufacturing glass base material

A porous glass base material manufacturing system comprises:

• a raw material supply apparatus comprising:
• a raw material tank in which organic siloxane raw material in a liquid state is stored, and the remaining space is filled with inert gas;
• a liquid feed pump to pump the organic siloxane raw material from the raw material tank;
• a circulating piping and a branch piping through which the organic siloxane raw material pumped by the liquid feed pump is passed;
• a liquid mass flow controller that controls the flow rate of organic siloxane raw material passed through the branch piping to a predetermined flow rate;
• and
• a vaporizer provided downstream of the mass flow controller to vaporize the organic siloxane raw material;
• and
• a porous glass base material manufacturing apparatus installed indoors in a building and equipped with a burner that combusts organic siloxane raw materials to produce silica fine particles,
• wherein the raw material supplying apparatus is installed outdoors or indoors in a separate building.