Straight Through

Overview

The straight-through (or full-bore) type diaphragm valve's design uses a flat bottom, parallel to the flow of material. The design allows for the flow of material to be mostly uninhibited, and avoid major obstructions in the path of flow [1]. However, in a straight-through type diaphragm valve, the diaphragm itself needs to be much more flexible due to its longer travel, which can lead to a shorter lifespan for the diaphragm. 

Straight through type diaphragm valves are mainly used for sludge, slurries, and viscous fluids, but are not suitable for high temperatures [2]. They are commonly used in the beverage industry, due to their ease of cleaning without requiring removing the valve from the system [3]. However, compared to the weir types, they require much more maintenance and have a shorter life span [2].