Patent ID: 11912607
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 2:
3. A raw material supply method that supplies a raw material to a burner when manufacturing a glass fine particle deposited body, the method comprising:
pressure-feeding a liquid raw material to a liquid mass flow controller (MFC) by a liquid raw material pressure feed pump via a liquid raw material pipe with one end connected to a liquid raw material tank in which the liquid raw material formed of liquid siloxane is stored;
providing a pressure adjustment valve on a secondary side of the liquid raw material pressure feed pump in the liquid raw material pipe;
connecting a secondary side pipe of the pressure adjustment valve to a location with a pressure lower than a pressure of a primary side thereof;
adjusting a primary pressure of the liquid MFC by the liquid raw material pressure feed pump and the pressure adjustment valve; and
vaporizing the liquid raw material on a secondary side of the liquid MFC and supplying the vaporized liquid raw material to the burner,
wherein an opening degree of the pressure adjustment valve is adjusted according to a change in the pressure on the primary side of the pressure adjustment valve.