Diverter valvestwo-way and multi-port, pneumatically actuated.

Before a diverter goes in, changing destination on a conveying line means undoing a coupling and physically swinging a bend across to another port. It works, and plenty of plants still run that way. What it costs is time at every changeover, a person at height, and the standing risk that someone points the line at the wrong silo. A pneumatically actuated diverter takes that decision into the control system, where it can be interlocked against the batch record.

The internal form matters more than the actuator. A tunnel or plug body keeps a smooth, continuous bore through the valve in either position, which is what a conveying line needs — any step or dead pocket becomes a wear point and a place for product to sit between batches. Blade and flap types are simpler and cheaper, and they are perfectly good on a gravity chute or a dust extraction duct where there is no conveying velocity to worry about.

Multi-port units extend the same idea. Where a single receiving point has to feed a row of silos or a bank of day bins, a multi-port diverter indexes to the selected outlet rather than stacking two-way valves in series. Fewer joints, one actuator to maintain, and one position signal for the control system to prove before the blower starts.

Sealing and changeover are where product knowledge decides the specification. A paint or pigment line changing colour needs a valve that seals hard and cleans out completely, because carry-over shows up in the next batch. A food line needs a finish and a seal material that survives the cleaning regime. An abrasive mineral needs a wear-tolerant body and a plan for replacing the seals rather than the whole valve.