What is cast steel on valves? Like WCB butterfly valves, WCB check valves, WCB gate valves….

Cast steel valves are one of many valve types and are manufactured from cast steel(carbon steel). the applicable temperature of cast steel valves is ≤425℃, and the applicable mediums of cast steel valve is water, oils, natural gas,etc. The common used cast steel valves are: cast steel ball valve, cast steel gate valve, cast steel check valve, cast steel globe valve, cast steel strainer,etc. 

Cast steel valve material code: 

Cast steel materials(WCA,WCB,WCC) are suitable for pipes with nominal pressure PN≤40Mpa, working temperature is between -29~ 425℃, the working temperature for 16Mn、30Mn is between -29～595℃, which is often used to replace ASTM A105. for cast steel materials, the commonly used grades are: WC1, WCB, ZG25,high quality steel 20,25,30, and low-alloy structural steel 16Mn. 

Introduction for Model No. of cast steel valve: 

Q41H-16C: Q represents ball valve, 4 stands for flange connection, 1 is for straight-through type structure. H represents the sealing surface is Cr 13 series of stainless steel. 16 means the nominal pressure is 16 KGS(or 1.6Mpa). 

Z11F-10C：Z represents gate valve, 1 stands for internal thread connection, 1 stands for single valve plate. F means the sealing surface is lined with PTFE seal. 10 means the nominal pressure is 10KGS(1.0Mpa). 

D373W-20C:D represents butterfly valve, 3 stands for worm gear box driving. 7 is for wafer type connection; 3 stands for triple eccentric structure; W represents the sealing material is using the valve body seal; 20 represents the nominal pressure is 20KGS(2.0Mpa).