Single Ball with Double Isolation / Double Seats

GEKO Valves has successfully supplied a series of API 6D Trunnion Mounted Ball Valves and Check Valves for high-pressure pipeline and process applications. This shipment covers multiple valve sizes and configurations, all designed and manufactured in strict accordance with international standards, ensuring reliability, safety, and long-term performance in critical services.     This article summarizes the key technical features, materials, and standards of the delivered valves, providing a clear reference for engineers, EPC contractors, and end users.     API 6D Trunnion Mounted Ball Valves (Class 600) 4” Trunnion Mounted Ball Valve – Full Bore, Class 600 The 4-inch API 6D trunnion mounted ball valve is designed for high-pressure isolation duties in oil & gas transmission pipelines. Key Technical Features: Size: 4” Bore: Full Bore Design: Trunnion Mounted Ball Valve Construction: Three / Two Pieces Side Entry Technology: Double Block and Bleed (DBB) Single Ball with Double Isolation / Double Seats Internal Check Valve for sealant system Secondary Sealant Injection on stem and seat plugs Vent & Drain Connections as per API 6D Fire Safe Design in accordance with API 6FA / API 607 Antistatic Device and Anti-Blow Out Stem Operation: Gearbox with Locking Device   Standards & Ratings: Design Standard: API 6D Pressure Class: ASME Class 600 End Connections: Flanged RF – ASME B16.5 Face to Face: API 6D Materials: Body: ASTM A105N Ball: Duplex Stainless Steel ASTM A182 F51 Stem / Trunnion: Duplex F51 Seat: Tungsten Carbide Hard-Faced Spring: Inconel X750 Gland Packing: Graphite O-Rings: Viton Bolting: ASTM A193 B7 / A194 2H     6” Trunnion Mounted Ball Valve – Full Bore, Class 600 The 6-inch API 6D trunnion mounted ball valve shares the same high-integrity design philosophy and is suitable for large-diameter pipeline applications. Main Specifications: Size: 6” Pressure Rating: 600 LB Bore: Full Bore End Connections: RF x RF, ASME B16.5 Construction: Three / Two Pieces Side Entry DBB with Single Ball (Double Seats) Internal Check Valve Secondary Sealant Injection System Vent & Drain Connections Fire Safe: API 6FA / API 607 Antistatic & Anti-Blow Out Stem Operation: Gearbox with Locking Device Materials: Body: ASTM A105N Ball: Duplex ASTM A182 F51 Stem / Trunnion: Duplex F51 Seat: Tungsten Carbide Hard-Faced Spring: Inconel X750 Packing: Graphite O-Rings: Viton Bolting: ASTM A193 B7 / A194 2H   1” High-Pressure Ball Valve – 800 LB GEKO also delivered a 1-inch high-pressure ball valve, designed for compact installations requiring high integrity sealing. Technical Highlights: Size: 1” Pressure Rating: 800 LB Bore: Full Bore Connection: Long Nipple, SW x FNPT Body Material: Carbon Steel Trim: Duplex Stainless Steel Seals: Viton A Plug, Vent & Drain locations as per API 6D Replaceable Seats Seat & Stem Sealant Injection System(with internal check valve where applicable) Fire Safe: API 6FA / API 607 Antistatic Device & Anti-Blow Out Stem Bolting: ASTM A193 B7 Ready for Locking Device Installation     API 594 Wafer Lugged Check Valve – Class 600 In addition to ball valves, GEKO supplied API 594 wafer lugged check valves for reliable backflow prevention. Specifications: Type: Wafer Lugged Check Valve Pressure Rating: ASME Class 600 Installation: Between Raised Face Flanges Design Standard: API 594 Materials: Body: ASTM A216 WCB Plates: Duplex ASTM A182 F51 Trim: Duplex ASTM A182 F51 Seat: Metal-to-Metal Pins / Retainers: Duplex F51 Spring: Inconel X750