Ball valve type code Q. Pre-low temperature ball valve plus "D"; Pre-insulated ball valve plus "B". Code 0 1 2 3 4 5 6 7 8 9 Transmission Turbine Pneumatic Connection Type Female Thread Flanged Welding Clamp Type Code Structure Ball Valve Q Straight Angular Right Angle Floating L Floating Ball T Floating Ball Fixed Ball handwheel, handle and wrench drive code omitted. Sealing surface or lining material code sealing surface or lining material code steel alloy T infiltrating steel D rubber X cemented carbide Y nylon plastic N lining rubber J fluoroplastic F lined lead Q tin base bearing alloy (bar) B enamel C alloy Steel H boronizing steel P nominal pressure code with Arabic numerals, the value is 10 times the nominal pressure value in megapascals. Valves used in the power plant industry have a value 10 times the value of the working pressure in megapascals when the maximum temperature of the medium exceeds 530 ° C. Body Material Gray cast iron Ductile iron Carbon steel Alloy steel (chrome molybdenum steel) Stainless steel Special alloy Code ZQ WCB WC1 LCB LC3 WC6 WC9 C5 / C12 Normal CF8 CF8M CF3 CF3M MC C1 C2 C3 I6 I9 I5 P R1 R2 R3 R4 Ball valve performance Standardize the pilot project