Normally the stem in a ball valve is separated from ball and not fastened to the ball.

Stem Ball is entirety casted in one piece and then made through various machining procedures.

With stem on valve ball is normally used for high pressure trunnion ball valves or cryogenic ball valves.

Sizes and shapes are all according to customers’ drawing.

Product Feature


Bore Size : 1/4″ to 1/2″, DN6 to DN10

Roundness : 0.01 – 0.03mm

Surface Roughness : ≤0.4μm

ID Roughness : 0.4μm – 1.6μm

OD Tolerance : ±0.02mm

ID Tolerance : ±0.02mm

Material Type : Forging, Round Bar

Material : 304, 304L, 316, 316L, CF3, CF3M, CF8, CF8M, 1.4408, 1.4509, 1215, 2205, F51, CA15, CD3MN, CE3MN, 17-4PH, SCS13A, SCS14A, 1.4529, 316Ti, Alloy 20, Hastelloy C, etc.

Surface treatment : Mirror Polishing