Hubless cast iron ivhu pombi uye mafittings anoshandiswa mukuyerera kwegiravhiti.Aya mapombi uye mafittings anoitirwa asiri-pressure application, sekusarudzwa kwehukuru hwakakodzera hwehutsanana, tsvina, vent, uye dutu remvura masisitimu.Mapombi ari centrifugal casting, campact structure, isina pinhole porosity uye slay, yakatsetseka pamusoro uye kunyange kukora kwemadziro.