Patent ID: 7607454

Claim:
A composite valve, comprising: a main valve unit including a vacuum port connected to a vacuum feeder, a pressure port connected to a pressure fluid feeder, a vacuum-side valve member that opens and closes a vacuum channel connecting the vacuum port with a combining port, and a pressure-side valve member that opens and closes a pressure channel connecting the pressure port with the combining port; a channel combining section including the combining port for connecting with a load, filter chambers respectively interposed in the vacuum channel and the pressure channel, and a filter detachably disposed in each of the filter chambers; and a pilot valve unit including two pilot valves that individually operate the vacuum-side valve member and the pressure-side valve member of the main valve unit, wherein the main valve unit, the channel combining section, and the pilot valve unit have a same width, the channel combining section connects to one end side of the main valve unit in a direction of an axis of the main valve unit, and the pilot valve unit connects to an other end side, so that the main valve unit, the channel combining section, and the pilot valve unit connect to one another in a line along the axis, wherein the combining port is provided at a front end face of the channel combining section, the filter chambers are provided along the axis in opposite positions of the combining port in the channel combining section, and the filter is detachably mounted in each of the filter chambers with a detachable filter holder from the front end face via the detachable filter holder, and wherein the filter is cylindrical in shape, the filter holder is columnar in shape, a channel hole that constitutes part of the vacuum channel and the pressure channel is formed in an interior of the filter holder, one end of the channel hole communicating with the combining port through a hole in a side surface of the filter holder, and the filter is mounted around an outer periphery of the filter holder so as to cover the hole.