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Machine Design

Rotary Selector Valves

A selector valve switches a single input between two, three, four, five, or six output ports.

The valve comes with detents for manual operation with a knob or, alternatively, without detents for automatic operation with a servo or stepper motor. Nonselected ports vent to atmosphere. In an optional configuration with built-in check valves, two, three, four, five, or six input ports can be switched to a single output port, commonly used to sample pressure readings at multiple locations and feed them to a common pressure gage. This eliminates the need for multiple gages. Nonselected ports are sealed to prevent leakage. Valve-head OD is about 1 in. and length depends on the choice of tube fittings, though typical length is about 1.6 in.

Beswick Engineering Co., 284 Ocean Rd., Greenland, NH 03840, (603) 433-1188,

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