| 摘要 |
PROBLEM TO BE SOLVED: To insert/extract a filter main body installed in a communication passage between a first channel and a second channel easily and smoothly from the outside without liquid and to implement cleaning, replacement, etc., of the filter main body efficiently. SOLUTION: A filter 20 for liquid has a filter main body 41 placed in a communication passage 1g between a first channel 1a and a second channel 1d, a ring-shaped support member supporting the main body 41, and an insertion/ extraction member 50 which is connected/fixed to the main body 41 through the support member and freely extracted from the second channel 1d with the main body 41. The second channel 1d has an opening part opened to the outside, and at the free end of the member 50 extending in the channel 1d, an opening/closing member which opens/closes the opening part of the channel 1d from the outside is provided. The member 50 has a guide member 54 for introducing the main body 41 into the communication passage 1g.
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