He kūpono ke kīpē ʻīpuka pahi no ka ʻōpala a me ka pipeline waena i loaʻa i ka fiber, a hiki i kāna pā kīpē ke ʻoki i ka mea fiber ma waena; Hoʻohana nui ʻia ia i ka lawe ʻana i ka slurry lanahu, mineral pulp a me ka papermaking slag slurry pipeline. ʻO ke kīpē puka pahi ka derivative o ka valve puka, a loaʻa iā ia kona mau pono a me nā hemahema. 2. ʻO ka hana maʻalahi, ka leo liʻiliʻi, ke kaumaha māmā a me ka hoʻokomo pono. Nā hemahema o ka ʻīpuka puka pahi: hiki ke hoʻohana wale ʻia i ka pipeline haʻahaʻa haʻahaʻa. Hoʻohana nui ʻia ʻo Knife gate valve i ka pipeline slurry, hiki ke ʻōlelo ʻia he valve kūikawā no ka pipeline slurry.