Portable Conveyors PORTABLE CONVEYORS: THE Add-A-Veyor/Porta-Veyor A Very Good Product. Great Labor Savings. Lightweight. Moveable. The Standard all other Conveyors Try to Attain. Useful as greenhouse conveyors, product conveyors, nursery conveyors and especially useful because the Add-A-Veyor/Porta-Veyor is portable! If you are looking for portable conveyors, visit our portable conveyor web site for full details, or contact us for in-depth Information.