ʻO ka screw feeder kekahi o nā mea pono e pono ai no nā ʻoihana māmā a me nā ʻoihana kaumaha e like me ka ʻoihana kemika hou, lāʻau lapaʻau, meaʻai, metallurgy, nā mea kūkulu hale, sideline mahiʻai, etc. kaʻina hānai ʻAʻole loa i ka makū, ka haumia, nā mea ʻē, a me ka leakage.