Name : Specail Shaped Water Channel Lining High Temperature Hot Blast Valve Specification : DN500- ... valve Model : QYTR43R,QYTR43fR,QYTR743R,QYTR743fR,QYTR943R,QYTR943fR,QYTR9T43R The special shaped water channel and lining high temperature hot blast valve designed ... completely. The main material is Q235,20g, 1Cr18Ni9Ti and the special heat-resistant alloy steel.