Split body valves

A valve assembly, having two separate body components which are sized and adapted to form the valve body in such a manner that the vertical and horizontal orientation of the two body components with respect to each other and with respect to the valve member and valve stem is assured. The valve assembly also includes axially insertable seats and/or a composite seat, each being sized and adapted to assure the sealing integrity of the valve assembly when the valve member is in the open or the closed position.