Low-torque disc for a multiple orifice valve

A multiple orifice valve, comprising:

• a housing;
• a first disc positioned within a cavity of the housing and comprising a first disc orifice;
• and
• a second disc positioned within the cavity of the housing and comprising a second disc orifice;
• wherein a surface of the first disc comprises a recessed portion that extends across a center of the surface and is configured not to contact the second disc while the multiple orifice valve is in an open position and while the multiple orifice valve is in a closed position, and the surface of the first disc comprises a raised portion that is configured to contact and to seal against the second disc at least while the multiple orifice valve is in the closed position.

A disc for a multiple orifice valve, comprising:

• a disc body;
• a disc orifice extending through the disc body;
• and
• a disc surface of the disc body comprising a recessed portion, a raised portion, and one or more radially-extending channels;
• wherein the recessed portion extends across a center of the disc body and is configured not to contact an opposed disc when assembled within a housing of the multiple orifice valve, the raised portion at least partially circumferentially surrounds the recessed portion and circumferentially surrounds the disc orifice, the raised portion is configured to contact the opposed disc when assembled within the housing of the multiple orifice valve, and the one or more radially-extending channels are configured to enable a flow of fluid across the raised portion to the recessed portion.