1-Piece Ball Valves
1‑piece ball valve adopts integrated valve body design, featuring compact structure, light weight and easy installation. It is suitable for fluid control scenarios with strict space and cost constraints. The ball realizes quick on‑off via 90° rotation with excellent sealing performance. Widely used in water treatment, food & beverage, HVAC, small chemical industry and general industrial pipeline systems, it serves as an ideal shut‑off valve solution for low‑pressure and normal temperature working conditions.
Structural Features
Integrally formed valve body: No middle flange connection to eliminate external leakage risk and deliver high overall strength.
Cost‑effective: Simplified structure reduces manufacturing cost with outstanding cost performance.
Fast operation: 90° quarter‑turn design for rapid opening & closing and sensitive response.
Excellent corrosion resistance: Main body made of 304/316 stainless steel, anti‑rust and compatible with various media.
Easy maintenance: Top entry structure for convenient replacement of seats and sealing parts.
Product Specifications
| Item | Specifications |
| Product Name | Stainless Steel 1‑piece Ball Valve |
| Model | Q11F |
| Valve Body Material | CF8 / 304 / CF8M / 316 |
| Connection Type | Internal Thread |
| Nominal Size | 1/4"~2" |
| Operation Mode | Manual |
| Applicable Media | Water, gas, oil, etc. |
| Operating Temperature | -10℃~130℃ |
| Nominal Pressure | PN16 |
| Design Standard | ANSI B16.34; API608 |
| Wall Thickness Standard | ANSI B16.34; EN12516‑3 |
| Thread Standard | ANSI B1.20.1; BS21; DIN 2999/259; ISO 228‑1; ISO7/1; JIS B0203 |
| Test Standard | API598; EN 12266 |
Material of Main Parts
| No. | Part Name | Material 1 | Material 2 | Material 3 |
| 1 | Valve Body | A351 CF8 | A351 CF8M | A216 WCB |
| 2 | Bonnet | A351 CF8 | A351 CF8M | A216 WCB |
| 3 | Compression Plate | 304/316 | 304/316 | 304/316 |
| 4 | Seat 1 | PTFE/RPTFE | PTFE/RPTFE | PTFE/RPTFE |
| 5 | Ball | 304/316 | 304/316 | 304/316 |
| 6 | Seat 2 | PTFE/RPTFE | PTFE/RPTFE | PTFE/RPTFE |
| 7 | Valve Stem | 304/316 | 304/316 | 304/316 |
| 8 | Anti‑wear Washer | PTFE/RPTFE | PTFE/RPTFE | PTFE/RPTFE |
| 9 | Packing | PTFE/RPTFE | PTFE/RPTFE | PTFE/RPTFE |
| 10 | Gland | 304 | 304 | 304 |
| 11 | Handle | 201 | 201 | 201 |
| 12 | Gasket | 304 | 304 | 304 |
| 13 | Nut | 304 | 304 | 304 |
Conclusion
Stainless steel 1‑piece ball valve is a simple, economical and space‑saving shut‑off valve. It adopts reduced bore design with slightly lower flow capacity than full port ball valves, but meets the demands of most low‑pressure normal temperature working conditions with low failure rate and long service life, which is the preferred choice for bulk procurement and standardized projects. For full port design, frequent disassembly or high pressure & high temperature working conditions, two‑piece or three‑piece stainless steel ball valves are recommended.
