The model of the ball valve is represented by the ball valve type Q, ball valve driving method, ball valve connection method, ball valve structural form, sealing material, and valve body material code.

1. The ball valve type code is Q;

2. The drive mode code of the ball valve is represented by letters. The common ones are 2-electro-hydraulic, 9-electric, 6-pneumatic, 5-bevel gear transmission, 3-worm gear; manual does not need to be written out

3. The connection form code of the ball valve is represented by letters, 1-internal thread, 2-external thread, 4-flange type, 6-When welding, 7-wafer type, 9-clamp, 0-ferrule;

4. Ball valve structural form code, 1-floating straight flow channel, 2-floating Z-shaped flow channel, 3-Floating three-way flow channel, 4-Floating angle flow channel, 5-Floating DC flow channel, 7-Fixed straight flow channel, 6-Fixed four-way flow channel, 8-T-shaped three-way flow channel, 9-L Shaped three-way flow channel, 10-hemispherical straight.

5. Sealing materials or lining materials are made of R-austenitic stainless steel, T-copper alloy, X-rubber, S-plastic, N-nylon plastic, F-fluoroplastic, H-Cr series Stainless steel, Y-tungsten carbide, J-rubber lining, M-Monel;

6. Valve body material code Z-gray cast iron, K-malleable cast iron, Q-ductile iron, T-copper and Alloy, C-carbon steel, P-chromium-nickel stainless steel, R-chromium-nickel-molybdenum stainless steel, V-chromium-molybdenum-vanadium steel.

It is impossible to write the complete model number with only the words "cast iron ball valve". You can write it based on this.