US Patent 10914390 Fluid valve assembly including valve body with seal retention features

A fluid valve includes a valve body, and a valve plug disposed in the valve body. The valve body includes a base and a cylindrical sidewall that together define a valve plug chamber. The valve body includes valve ports. The valve plug is rotatable relative to the valve body about a rotational axis. The valve plug supports an annular seal in such a way that, a) for certain orientations of the valve plug with respect to the valve body, the seal abuts and inner surface of the sidewall and provides a fluid-tight seal between the valve plug and the valve body, and b) during rotation of the valve plug relative to the valve body, the seal is moved relative to the valve body along a circular path. At least one of the valve ports includes a guiding feature that guides the seal along the circular path.