Core Advantages & Technical Features
Zero-Leakage Monolithic Body: The seamlessly welded outer casing eliminates secondary leakage paths, guaranteeing complete fluid containment and preventing environmental hazardous contamination.
Direct-Burial Optimization: Free from external bolts or moving body joints, the valve requires zero structural maintenance, allowing it to be safely buried underground with extended stem extensions for space-saving municipal deployment.
Dual Block and Bleed (DBB) Performance: The seat rings act independently to seal the fluid upstream and downstream simultaneously. The body cavity can be safely vented or drained via a specialized bleed valve when the main ball is fully closed.
Anti-Blowout Stem & Anti-Static System: Engineered with an internal shoulder design that prevents stem blowout under full system pressure. Integrated grounding springs guarantee electrical continuity between the ball, stem, and body to mitigate static discharge hazards.
Low Torque Heavy-Duty Gearbox: Equipped with a precision-machined enclosed bevel gear actuator that substantially lowers manual input force, facilitating effortless emergency isolation under maximum differential pressures.
Applicable Working Conditions & Industrial Sectors
This large-diameter welded valve series thrives in critical distribution grids and heavy utility operations handling water, crude oils, refined petroleum products, and non-corrosive industrial gases.
Primary Applications Include:
Municipal District Heating & Water Supplies: Main isolation loops for high-volume urban hot water networks, chilled water circuits, and bulk raw water distribution lines.
Natural Gas Transmission Grids: High-volume city gate stations, regional distribution headers, and natural gas storage facilities.
Petrochemical Tank Farms & Utilities: Process cooling water lines, product storage tank isolation, and industrial refinery utility networks.
Large-Scale Industrial Systems: High-capacity power plant cooling loops and industrial water recycling infrastructure.
Standard Technical Parameters
Parameter Item | Standard Specifications / Values |
Design & Manufacturing Standard | GB/T 12237 / API 6D / ASME B16.34 |
Pressure-Temperature Rating | GB/T 12224 / ASME B16.34 |
Face-to-Face Dimensions | GB/T 12221 / API 6D / Manufacturer Standard |
Welding End Connections | GB/T 12224 / ASME B16.25 (Butt-weld bevel matching pipe schedule) |
Inspection & Pressure Testing | GB/T 13927 / API 598 / API 6D (Zero leakage gas testing) |
Nominal Size Range Scope | DN500 to DN2000 |
Nominal Pressure Classes | PN25 / ASME Class 150 / Class 300 |
Body Shell Material Options | High-grade Carbon Steel (Q345R, A105, WCB) / Stainless Steel (304, 316) |
Seat Sealing Configurations | Soft Seating (PTFE, RPTFE, Nylon, Devlon) / Hard Seating (Metal-to-Metal + WC) |
Maximum Operating Temperature | Up to 425°C (Depending on body material and soft/hard seating matrix) |
Actuation Adaptability | Enclosed Bevel Gearbox, High-Torque Electric Actuator, Electro-Hydraulic Actuator |
Selection Recommendations & Guidelines
Buried Installation Customization: For underground municipal pipelines, always specify the valve with a customized Extended Stem and matching grease/drain lines brought up to ground level. This allows all lubrication and emergency venting operations to be carried out safely from the surface without requiring expensive excavation chambers.
Seat Material Selection Matching: For standard municipal water or clean natural gas lines below 120°C, high-performance soft seating (RPTFE or Devlon) provides reliable bubble-tight shutoff at lower operating torques. If the media involves high-temperature steam utility networks or abrasive particulate fluids up to 425°C, a hard-faced metal-to-metal seating system must be chosen.
End Connection Matching: Because large-caliber welded valves are permanently integrated into pipelines via butt-welding, the exact wall thickness (Schedule) and material grade of the matching pipeline must be provided during configuration. This ensures identical chemical compatibility and a perfect weld bevel profile during site installation.
Avoid Throttling Operations: Like all standard ball valves, this series is strictly designed for complete full-flow isolation. Operating the valve in a partially open position will subject the exposed soft or metal seats to rapid asymmetric erosion, destroying the critical sealing face and leading to internal bypass leakage.
FAQ
1.When can I get a quotation?
We typically provide a quotation within 4 hours of receiving your inquiry. Urgent requests are given priority.
2.Do you support customized valves?
Yes. We support OEM and customized valves according to drawings, specifications, and special working conditions.
3.What is the production lead time?
Normally, production can be completed within 15 working days after order confirmation, depending on product type and quantity.
4.What standards do your valves comply with?
Our products comply with GB, ANSI, API, JIS, DIN, BS, and other international standards.
5.What pressure, size, and temperature ranges can you supply?
Pressure: Class 150-3500 Size: DN10-DN3000 Temperature: -196ºC to 610ºC
6.What certifications do you have?
We are certified with ISO 9001, CE, and provide third-party inspection and test reports upon request.
7.What delivery and payment terms do you offer?
Delivery terms: EXW, FOB, CFR, CIF
Payment terms: T/T (30% deposit + 70% balance), L/C, and other terms by agreement.
8.Do you provide technical support and spare parts?
Yes. We offer 24/7 technical support and supply spare and consumable parts for long-term service.
