Ball Check Valve Stem
One-way check valve stem with a spherical tip that presses the ball onto its seat.
This is a dimension schematic, not a manufacturing drawing. Dimensions match the catalog data; request a quote with the part code to confirm before production.
Code & Size Table
Code, dimensions and tolerance for all 10 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| VALA-CHK-04 | 4 | 17 | taper | h7 | spherical ball tip |
| VALA-CHK-05 | 5 | 19.5 | taper | h7 | spherical ball tip |
| VALA-CHK-06 | 6 | 22 | taper | h7 · ⌀6: 0/−0.012 | spherical ball tip |
| VALA-CHK-08 | 8 | 27 | taper | h7 | spherical ball tip |
| VALA-CHK-10 | 10 | 32 | taper | h7 | spherical ball tip |
| VALA-CHK-06H | 11.5 | 20 | SW10 · taper | h7 · ⌀3.5: 0/−0.012 | AF10 hex body |
| VALA-CHK-12 | 12 | 37 | taper | h7 | spherical ball tip |
| VALA-CHK-14 | 14 | 42 | taper | h7 | spherical ball tip |
| VALA-CHK-08H | 15 | 24 | SW13 · taper | h7 · ⌀4.5: 0/−0.012 | AF13 hex body |
| VALA-CHK-16 | 16 | 47 | taper | h7 | spherical ball tip |
Prices are for approved members.
Material & Tolerance
The standard material is listed below; also available in steel, stainless, brass and aluminium. Dimensions in mm; tolerances machined to ISO. Deviations (mm) are given for the nominal diameter according to the ISO 286-2 tables; thread tolerances (6g/6H) are to ISO 965. For custom sizes/tolerances, contact us with the part code.
Manufacturing Scope
Ball Check Valve Stem is a Valve Parts family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀4–16 mm, lengths 17–47 mm, standard material Stainless Steel (also steel, brass or aluminium). Every variant's part code, dimension and tolerance is listed below; request a quote with the code you need.
The family is machined from ⌀16 mm bar stock; its longest variant is VALA-CHK-16 at 47 mm. Besides turning, the family requires hex flat milling (AF 10–13) and taper turning. All of it is completed in a single setup, without the part leaving the machine.
The variant with the highest length-to-diameter ratio is VALA-CHK-04: 17 mm long at ⌀4 mm, L/D 4.3. This ratio is achievable on a conventional lathe as well; the sliding-head advantage in series work is that the part never leaves the machine, so the size does not drift from variant to variant.
Variants are machined to h7 tolerance; the smallest is VALA-CHK-04 (⌀4 mm) and the largest VALA-CHK-16 (⌀16 mm). The family includes hex-drive, tapered, multi-step variants. Custom sizes, tolerances or materials are produced to the part code on request.
Need a size that isn't listed? We machine to your drawing — CNC contract machining. How these parts are made: What is a Swiss-type lathe?
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