Storage container for liquid chlorosilane and closing lid therefor

A storage container for a liquid chlorosilane, comprising:

• a tank which stores the liquid chlorosilane;
• a valve which is connected to the tank and to which an external pipe can be connected detachably;
• and
• a closing lid which seals the valve when the external pipe is detached from the valve,
• wherein the valve comprises a housing and a valve body provided in the housing, the housing has a connecting flange having a connecting surface to be connected detachably to the external pipe, and
• the closing lid has a lid body having a sealing surface contacting the connecting surface of the connecting flange, a supply pipe which supplies an inert gas to a space between the closing lid and the valve body in the housing, a supply valve which opens or closes the supply pipe, a discharge pipe which discharges a gas in the space, and a discharge valve which opens or closes the discharge pipe.