To provide an accumulator capable of commonly corresponding to a liquid without varying a material of a sealing member even if the serviced liquid is of any kind.
The accumulator is provided with bellows 2 in a pressure vessel 1, a gas chamber 3 charged with high pressure gas, and a liquid chamber 4 filled with the liquid and provided therein with a bulkhead 11 having a flow port 12 allowing the liquid to flow when the bellows 2 expands and contracts. The bellows 2 is provided with a block stopper body 13 blocking the flow port 12 therein. The accumulator is further provided with an enclosing means for enclosing the liquid between the bulkhead 11 and the bellows 2 by blocking the flow port 12 by means of the block stopper body 13 when the bellows 2 contracts or expands to a predefined stroke due to differential pressure between inside gas chamber 3 and inside liquid chamber 4. The block stopper body 13 is configured to include the sealing member 15 which comprises a fluoroplastic having heat resistance, and the flow port 12 is blocked by abutting the sealing member 11 on a receiving seat 22 provided on the bulkhead 11.
NAKANO NAOHITO
NIIHORI TAKEYOSHI
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