Valve device

Abstract

A valve device (1) comprises: a flow path housing (11) including a plurality of flow paths (21, 221, 222); a valve part (6) for opening and closing the flow paths (221, 222) of the flow path housing (11); and an actuator (15) for driving the valve part (6). The valve part 6 includes valve seats (121, 122), valve bodies (131, 132), a valve shaft (14), and a compression spring (37). A flow path adapter (41) including the valve seat (121) is disposed in the flow path (221) of the flow path housing (11). The flow path adapter (41) includes: an inner flow path wall (42) that is provided integrally with the valve seat (121), forms an inner flow path (45), and has an insertion hole (42a) through which the valve shaft (14) is inserted; an engagement part (43) that is engageable with the flow path housing (11); and a connection wall (44) that connects the inner flow path wall (42) and the engagement part (43). An adapter space 46 is provided between the inner flow path wall (42) and the connection wall (44) on the actuator (15) side of the inner flow path wall (42).

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