The JOEPAI Stainless Steel Threaded Mini Ball Valve is not a simple scaled-down version of a standard ball valve, but a precision control element purpose-built for compact equipment and low-flow applications. Manufactured through investment casting with an integrally formed body, it covers nominal bore sizes from DN6 to DN25 (1/8" to 1") and is available in both SS304 and SS316 materials to accommodate varying corrosion resistance requirements. While retaining the core advantages of standard ball valves—90° quick operation, near-zero flow resistance, and reliable sealing—it achieves significant reductions in size, weight, and installation footprint. Features such as a blow-out proof stem for operational safety, PTFE seats for long-term zero-leakage performance, and support for multiple thread standards including NPT, BSPP, BSPT ensure flexible integration into global piping systems. Whether used in laboratory instruments, micro air compressors, drinking water lines, or automation control panels, the JOEPAI Mini Ball Valve delivers stable, reliable, industrial-grade shut-off control even in the most space-constrained environments.
A stainless steel mini ball valve typically refers to a quarter-turn shut-off valve with a nominal bore size ranging from DN6 to DN25 (1/8" to 1"), manufactured with a 304 (CF8) or 316 (CF8M) stainless steel body.
Its core function is to open or close the pipeline by rotating a spherical ball with a circular through-hole. It belongs to the shut-off valve category, not a regulating valve.
Compared with standard ball valves, it offers deep optimization in installation space, weight, cost, and operating torque, making it especially suitable for integration into modular equipment and compact piping systems.
Laboratory precision instruments: On/off control for gases or micro-fluid volumes, requiring low dead volume and zero contamination.
Micro air compressors and pneumatic systems: High-frequency cycling with low torque and long service life.
Drinking water and pure water equipment: 316L material with polished internal bore prevents heavy metal leaching.
Chemical analyzers and pharmaceutical equipment: Corrosion-resistant seals compatible with various weak acids and alkalis.
In the subtle aspects of industrial production and daily life, there are often hidden key components that determine efficiency and quality - Stainless Steel Threaded Mini Ball Valve. As an important member of fluid control systems, our mini ball valve has become an indispensable part of modern industry with its exquisite structure, efficient performance, and wide range of applications. This article will delve into the working principle of mini ball valves.
Stainless Steel Threaded Mini Ball Valve, as the name suggests, is a type of ball valve that is compact in size and structure. Its working principle is similar to that of a regular ball valve, with the core component being a ball with a through-hole (called a valve ball), which is rotated to open and close the valve.
When the through-hole on the sphere is aligned with the inlet and outlet of the valve, the fluid can pass smoothly and the valve is in the open state; On the contrary, when the sphere rotates 90 degrees, the through hole is closed by the sealing surfaces on both sides of the valve body, the fluid is cut off, and the valve is closed.
This simple rotation action is not only easy to operate, but also has excellent sealing performance, making it an ideal choice for controlling fluid flow.
| NO. | PART NAME | MATERIAL | |
| 1 | BODY | CF8 | CF8M |
| 2 | CAP | CF8 | CF8M |
| 3 | SEAT | PTFE | PTFE |
| 4 | BALL | SS304 | SS316 |
| 5 | BOLT | SS304 | SS304 |
| 6 | STEM | SS304 | SS316 |
| 7 | O-RING | NBR | NBR |
| 8 | HANDLE | ALUMINIUM ALLOY/CF8 | ALUMINIUM ALLOY/CF8 |
| DN | G | D | L | W | H |
| 6 | 1/8" | 7 | 40 | 22.8 | 26.5 |
| 8 | 1/4" | 7 | 40 | 22.8 | 26.5 |
| 10 | 3/8" | 7 | 40 | 22.8 | 26.5 |
| 15 | 1/2" | 9.2 | 46 | 22.8 | 28.3 |
| 20 | 3/4" | 12.5 | 54 | 22.8 | 31.5 |
| 25 | 1" | 15 | 65 | 22.8 | 34 |
1. What is the maximum working pressure for this mini ball valve?
Rated at 1000 WOG (PN63), suitable for water, oil, gas, and most low-to-medium pressure fluid systems.
2. How to choose between SS304 and SS316?
SS304 (CF8) — Suitable for general water, oil, and gas applications.
SS316 (CF8M) — Recommended for environments containing chlorides, seawater, or acidic media, offering superior corrosion resistance.
3. What thread standards are supported?
NPT, BSPP, BSPT are all supported. Please specify your preference when placing an order.
4. What is the working temperature range?
Standard range: -20°C to 200°C (-4°F to 392°F). The PTFE seat ensures stable sealing across the entire range.
For high-temperature conditions, PPL seats are available, withstanding up to 300°C.
5. Is it suitable for drinking water systems?
Yes. The SS316L + PTFE material combination is suitable for potable water lines.
6. Do you offer OEM or ODM customization?
Yes. Customizations include handle styles, body engraving, length dimensions, and thread types.
Please provide your drawings or specifications, and our engineering team will respond with a technical solution within 24 hours.
Address
Building 2, No. 4228, Binhai 3rd Road, Xinghai Street, Longwan District, Wenzhou City, Zhejiang Province, China
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