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GB/T 12237 Metal-Seated Ball Valve - Low Platform
STELLITE METAL-TO-METAL · UP TO +350°C · STEAM & THERMAL OIL
Chinese-standard Metal-Seated ball valve for high-temperature
steam, thermal oil, and abrasive media service. GB/T 12237
construction with Stellite metal-to-metal sealing (HRC 38–45).
Low platform ISO 5211 interface for pneumatic/electric
actuator automation. Service temperature up to +350°C —
well beyond PTFE soft seat limits.
| GB/T 12237 | |
|---|---|
| Pressure | PN16 / PN25 / PN40 |
| Size Range | DN15 – DN200 |
| Body | WCB · CF8 · CF8M (316SS) |
| Seat | Stellite Metal-Seated Alloy |
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— Full Specifications
GB/T 12237 Metal-Seated Ball Valve - Low Platform - Parameter Table
| PARAMETER | SPECIFICATION |
|---|---|
| Standard | GB/T 12237 |
| Model | Q41Y-PW16-YT |
| Pressure Rating | PN16 / PN25 / PN40 |
| Size Range | DN15 – DN200 |
| Body Material | WCB (Carbon Steel) / CF8 (304 SS) / CF8M (316 SS) |
| Ball Material | A105+ Stellite Overlay / SS316 + Stellite Overlay |
| Seat Material | Stellite Hard Alloy (Metal-to-Seated) |
| Stem Material | SS304 / 17 - 4PFXM-19 |
| End Connection | Flanged – GB/T 9113 |
| Platform Type | Low Platform – ISO 5211 / Bracket & Coupler for Actuator |
| Leakage Class | GB/T 26480 Class B / API 598 Class IV |
| Temperature Range | -29°C ~ +350°C |
| Applicable Media | Steam / High-Temp Oil / Abrasive / Corrosive Media |
Our Production Process
1. Casting
2. Machining
3. Testing
4. Loading
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· Product documentation
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This Product Spec Sheet
Single-page datasheet for GB/T 12237 Hard Seated Ball Valve – Low Platform
- Full parameter table
- Dimensional drawing
- Materials & standards list
- Ordering code guide
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— WHY bAUTU
Why Specify This Valve from Bautu
High-Temperature Stellite Trim
Stellite cobalt-chromium overlay maintains hardness and shutoff integrity up to 350°C — well past PTFE thermal limit. Ideal for steam mains, thermal oil heaters, and refinery distillation.
GB National Standard — Domestic Project Ready
GB/T 12237 compliance with GB/T 9113 flange dimensions. Accepted on Chinese power generation, district heating, and petrochemical EPC projects without standard conversion.
— FAQ
Frequently Asked Questions
What does "metal seated" mean, and when is it preferred over soft seated?
Metal seated means both the ball and seat ring are made from hardened metal rather than polymer (PTFE/RPTFE). Metal seated valves meet API 6D Class IV leakage rate (≤100 ml/min per inch of bore) and withstand service temperatures from -29°C to +425°C on standard carbon steel bodies, with alloy steel options extending to +600°C, abrasive media, erosive fluids, and high-velocity steam that would quickly damage soft seats. They are the preferred choice for high-temperature process lines, steam service, catalyst-laden flows, and fire-safe critical applications.
What is GB/T 12237, and what do PN16 / PN40 pressure ratings mean?
GB/T 12237 is China's national standard for steel ball valves, covering design, materials, testing, and marking requirements. PN16 and PN40 are European nominal pressure ratings — PN16 equals 16 bar (232 psi) and PN40 equals 40 bar (580 psi) maximum working pressure. This combination makes the valve suitable for both domestic Chinese projects and international projects where Chinese or European (EN) flanged standards are accepted.
What is the lead time, and can you accommodate custom specifications?
Standard sizes (PN16 / PN40) with Stellite overlay are available in 4–6 weeks. Custom alloys, actuated packages, or witness inspection (SGS, BV, TÜV) typically add 1–2 weeks. Bautu supports full customization including body material upgrades (316SS, Duplex, Super Duplex), special bore sizes, and third-party NDT testing. Submit your datasheet for a tailored quote within 24 hours.
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