... valve disc 3.Material:stainless steel Precision casting butterfly valve discs Other name:valve disc ... steel discs,fully machined pump componentManufacturing Process:precision casting,etcMachining:turning,milling,grinding,machineryFinishing:blasting,polishing, ... ,Milling machine,Boring machine,Planing machine 4ProcessPrecision Casting 5Min Tolerance0.05mm 6Productioncapacity0.5-5000kg 7surface ...