Multi-route full sweep selection valve

A selection valve which includes a stator and which includes a rotor that is pivotally mounted about a pivot axis with respect to said stator to pivot between each of a plurality of rotor positions, wherein said stator has a plurality of largely axially-extending ports, and wherein said stator has a rear face and said rotor has a front face that lies facewise against said stator rear face at a rotor-stator interface, wherein:

• said rotor front face has first and second rotor channels, with said first rotor channel having a radial groove that extends with a radial directional component and that has a port end lying on a first port circle wherein a plurality of said ports lie on said first port circle, and with said first rotor channel having an arc groove that connects to said radial groove and that extends substantially circumferentially along part of an arc circle that is centered on said axis but that has a radius that is different from the radius of said first port circle, as viewed along said axis, with said arc groove having a free end that is furthest from said port end of said rotor channel;
• said stator rear face has first and second stator channels that each has a stator radial groove with a port end opening to one of said ports, and with each stator channel having a stator arc groove that connects to one of said stator radial grooves and that extends substantially circumferentially along said arc circle, with each of said stator radial grooves having a free end that is furthest from the corresponding port end of the stator channel;
• said rotor arc grooves and said stator arc grooves each extends circumferentially about said axis, by sufficient amounts so their free ends overlap at each of said plurality of said rotor positions.

A selection valve which includes a stator and which includes a rotor that is pivotally mounted about a pivot axis with respect to said stator to pivot between each of at least three rotor positions, wherein said stator has a plurality of largely axially-extending ports, and wherein said stator has a rear face and said rotor has a front face that lies facewise against said stator rear face at a rotor-stator interface, and said rotor front face has a plurality of channels for connecting different pairs of said ports at different ones of said rotor positions wherein:

• said ports have rear ends that lie on a port circle that is centered on said axis;
• said ports are angularly spaced by a first angle;
• said positions of said rotor are angled by a second angle that is less than said first angle;
• first, second, and third of said ports lie in positions wherein said second port lies between said first and third ports and is spaced by said second angle from said first port and from said third port;
• said rear face of said stator has first and second extension grooves, said second extension groove extending around said port circle and having a free end spaced by said second angle from said second port, and said second extension groove extends around said circle and has a free end spaced by said second angle from said second port.