The simplest design and most common type is a Z-body. The Z-shaped partition inside the globular body contains the seat. The horizontal seating arrangement of the seat allows the stem and disk to travel at a perpendicular to the pipe axis resulting in a very high-pressure loss. The valve seat is easily accessible through the bonnet which is attached to a large opening at the top of the valve body. Stem pass through the bonnet like gate valve. This design simplifies manufacturing, installation, and repair. This type of valve is used where pressure drop is not a concern and throttling is required.