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Product Overview
The 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve is an industrial-grade isolation solution engineered for large-diameter pipelines that demand absolute sealing reliability. Featuring a three-piece body structure, trunnion-mounted ball, and worm gear actuation, this valve provides smooth operation, minimal torque, and bubble-tight shut-off performance.
Manufactured according to API 6D and ASME B16.34 standards, the 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve ensures long-term stability in high-pressure, high-temperature, and corrosive environments. It is ideal for oil & gas transmission, petrochemical systems, power plants, and water treatment facilities where zero leakage and operational safety are critical.
Product Specifications
Body Material: LF2
Ball Material: F316+TCC
Seat: F316+TCC
Operatinf Temperature 200 Degree C
Painting: JOTUN Brand Anti-Corrosion Painting
With two stage Worm Gear
Applicable Standards:
Ball Valve design according to API6D,BS5351,ASME B16.34
Face to face ASME B16.10,AP6D
End Flanges ASME B16.5/ASME B16.47
Butt welded ends ASME B16.25
Fire Safety API607,API6A
Inspection and test API 598,API6D
Material: LF2
Size Range: 2"~48"
Pressure Rating: ASME CL, 150, 300, 600
Design Description:
- Structure : 2 pieces or 3 pieces body
- High shut-off sealing mechanism and low torque operation
- Block and bleed function
- Self-cavity pressure relief
- Fire safe design
- Blow out proof stem construction
- Anti-static design
- Locking device (for lever handle operation)
- ISO 5211 actuator mounting
- Emergency grease injection (option)
- PN design can be available
| Brand | DIDTEK |
| Structure | Ball |
| Valve Material | Didtek provide cast steel, stainless steel, special alloy, CI, DI etc |
| Valve Type | Didtek Produce Ball Valve |
| Valve Test | 100% quantity tested before delivery |
| Valve Guarantee | 18 months after shipments and 12 months after installed |
| Valve Structure | Tunnion Mounted Ball Valve |
| Valve Delivery | 15 - 30 days |
| Valve Sample | Sample Available by Didtek Valve |
| Valve Color | Customer request |
| Valve Packing | Plywood Case for Ball Valve |
| MOQ | 1 Set |
| Valve Certificate | API6D/CE/ISO9001/ISO14001 |
| Place of Origin | Zhejiang, China (Mainland) |
| Delivery Detail: | Shipped in 15-30 days after payment |
| Port | Shanghai Or Ningbo |
| Payment Terms | L/C,D/A,D/P,T/T, Western Union |
Key Features
Three-Piece Split Body Design: Enables easy assembly, maintenance, and inspection without dismantling the entire pipeline.
Trunnion-Mounted Ball: Reduces operating torque and enhances stability, especially in large-diameter (30-inch) pipelines.
Worm Gear Operation: Provides precise, effortless manual control for high-torque applications, ensuring smooth and safe actuation.
Zero-Leakage Performance: Advanced seat and seal design achieve bubble-tight shut-off, preventing any fugitive emissions.
Full Bore Flow: The full-port design minimizes pressure loss and maintains optimal flow efficiency through the 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve.
Robust Material Options: Available in stainless steel, carbon steel, or duplex alloys for durability and corrosion resistance.
Fire-Safe & Anti-Static Design: Compliant with API 607 / API 6FA fire-safe standards for enhanced system safety.
Optional Automation: Can be easily upgraded with pneumatic, hydraulic, or electric actuators for remote operation.
Applications
The 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve is widely used in:
Oil & Gas Pipelines: For safe isolation of crude oil, natural gas, and refined products.
Petrochemical Plants: For handling aggressive chemicals and high-temperature fluids.
Power Generation: For steam, condensate, and cooling water control.
Water & Wastewater Systems: Ideal for municipal and industrial water treatment networks.
Marine & Offshore Installations: Resistant to corrosion and suitable for seawater service.
Refineries & Terminals: For critical isolation and emergency shut-off operations.
FAQ
Q1: What makes this valve “Zero-Leakage”?
A: The 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve uses a precision-machined seat and ball interface, ensuring Class A bubble-tight sealing performance with no detectable leakage during pressure testing.
Q2: Why is a trunnion-mounted design preferred for large valves?
A: In large-bore valves like the 30-inch model, the trunnion design supports the ball at both ends, reducing seat friction and required torque, extending valve life and making operation safer.
Q3: Can the valve handle both high pressure and high temperature?
A: Yes. The 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve can be configured for Class 600 or above, and with metal-to-metal seats, it can handle temperatures up to +450 °C.
Q4: Is worm gear operation better than lever operation?
A: For large valves, worm gear operation is much safer and smoother, as it provides mechanical advantage and prevents operator fatigue during manual actuation.
Q5: What industries typically use this product?
A: The 30 Inch Worm Gear Zero-Leakage 3 PC Trunnion Ball Valve is ideal for oil & gas, chemical processing, marine, power generation, and municipal water systems.
