... etc Airtight surface type RF, FF, MF, MFM, TG, RTJ ect.size 1/2" - 84"DN10-DN2000Technology forged,castingservice OEM, design service and buyer ... the production license.Coatings Resist-rust,Transparent oil, yellow or black paint or vanish painting or as customers' require Pressure ND6 ... ,Asia,etcMaterial 316L, 316, 304L, 304, 321, 321H, Rst37.2, C22.8, A105, Q235Class150#,300#,400#,600#,900#,1500#,2500 ...