TongBall's API 6A slab gate valve gates are precision-engineered for critical wellhead and Christmas tree applications in the oil and gas industry. Manufactured to strict API 6A specifications, these gates deliver exceptional performance under extreme high-pressure, sour gas, and erosive conditions. Featuring precision-machined sealing surfaces with advanced surface hardening technologies including HVOF tungsten carbide coatings, Stellite overlay, and diffusion hardening, our gates achieve surface hardness exceeding HRC 70 with superior wear and corrosion resistance. Designed for H₂S/CO₂ corrosive environments per NACE MR0175/ISO 15156 standards, they ensure bubble-tight shut-off and long-term reliability even after repeated cycling in harsh wellhead conditions. Whether for onshore, offshore, or subsea applications, TongBall's API 6A gates provide unmatched performance and extended service life for critical well control equipment.
| Size Range | 2" to 36" (Custom sizes available) |
| Operating Temperature | -60°C to +350°C (Higher upon request) |
| Pressure Rating | API 2000 psi to 20000 psi |
| Material Grades | 45K, 60K, 75K (Carbon Steel); 410SS, 4130/4140 Alloy Steel; F51/F53 Duplex; Inconel 625/718; Monel K500; Custom alloys for sour service |
| Sealing Surface Material | Stellite 6/12/21, Tungsten Carbide (WC-CoCr),
13Cr, Inconel 625 |
| Manufacturing Process | Forging + Precision Machining + Surface Hardening |
| Surface Treatment | HVOF Tungsten Carbide, Stellite Overlay, Hard Chrome Plating, Nitriding |
| Sealing Surface Hardness | HRC 65-75 (HVOF WC), HRC 50-60 (Stellite), HV 800-1200 (Nitriding) |
| Sealing Surface Finish | Ra ≤ 0.4 μm |
| Flatness/Parallelism | ≤ 0.05 mm |
| Gate Design | Single Plate / Double Plate |
| Standards Compliance | API 6A, NACE MR0175/ISO 15156, NACE MR0103 |
| Quality Control | 100% Material Traceability, Dimensional Inspection, Hardness Testing, NDT (PT/UT), Third-party Inspection Available |
