Worm Gear All Welded Ball Valve
Nominal Diameter: DN 150 ~ 1400 mm
Nominal Pressure: PN 1.0 ~ 2.5 MPa
Applicable Mediums: Water, gas, oil products, natural gas
Applicable Temperature: ≤ 150°C
Worm Gear All Welded Ball Valve
The Worm Gear All Welded Ball Valve is a high-performance valve designed for long-term, maintenance-free operation in district heating, natural gas transmission, oil pipelines, and industrial utility systems. Featuring a fully welded body construction, it eliminates the risk of external leakage while providing superior strength, reliability, and service life. The worm gear operator ensures smooth and precise valve operation, especially for large-diameter and high-pressure applications.
The valve is engineered to withstand extreme temperatures, pressure fluctuations, and harsh environmental conditions, making it an ideal choice for buried, underground, and remote pipeline installations.
We offer comprehensive OEM and ODM manufacturing services to meet the specific requirements of global customers:
Our Worm Gear All Welded Ball Valves can be manufactured and tested according to international standards:
Parameter Specifications
| Parameter | Specification / Range |
|---|---|
| Valve Type | Worm Gear All Welded Ball Valve |
| Body Construction | Fully Welded Body |
| Body Material | Carbon Steel, Stainless Steel, Alloy Steel |
| Ball Material | Stainless Steel (SS304, SS316), Duplex Stainless Steel |
| Seat Material | PTFE, RPTFE, PEEK, Metal Seat |
| Size Range | DN15 – DN1400 (NPS 1/2" – 56") |
| Pressure Rating | PN16 – PN420 / Class 150 – Class 2500 |
| Bore Type | Full Port / Reduced Port |
| Connection Type | Butt Weld, Flanged, Customized Ends |
| Operating Temperature | -46°C to +200°C (Soft Seat) |
| High-Temperature Option | Up to +550°C (Metal Seat) |
| Operation Method | Worm Gear, Electric, Pneumatic, Hydraulic |
| Leakage Class | ANSI/FCI 70-2 Class VI |
| Fire Safe Design | API 607 / API 6FA |
| Anti-Static Design | Available |
| Stem Design | Blowout-Proof Stem |
| Testing Standard | API 598, ISO 5208 |
| Service Life | Up to 30 Years or More |
Industry Applications
The Worm Gear All Welded Ball Valve is widely used in critical pipeline systems that require high reliability, zero external leakage, and long-term operation.
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
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