Electric Actuated Large Size Welded Ball Valve

1. Main Structure and Specifications
(1) Fully welded valve body design
Built-in Submerged Arc Welding (SAW/TIG): The valve body adopts a boltless connection design, which eliminates the risk of leakage through the flanges, and is suitable for direct burial, high corrosion, and high pressure.

Optimized stress distribution: Ball or cylindrical valve body design with a pressure capacity of PN16~PN100 (Class 150~600), and some models can reach PN420 (Class 2500).

Material selection:

Carbon Steel (WCB): Normal Operating Conditions

Stainless Steel (CF8/CF8M): Corrosive Environment

Low temperature steel (LCC/LCB): LNG, liquid nitrogen and other ultra-low temperatures (-196°C)

(2) Large diameter design
Nominal Diameter (DN): DN300~DN2000 (12"~80"), suitable for high-flow transmission.

Full bore: Low coefficient of flow resistance (high Cv value) to reduce pressure loss.

(3) Electric Drive
High output torque: adapts to the high torque requirements of opening and closing large diameter ball valves.

Intelligent Control:

Control Type (0~90° Proportional Control): Used for Flow Control

Switch Type (Full Open/Full Closed): Used for Cut-off

Explosion protection certification (Ex d IIC T6): suitable for flammable and explosive atmospheres

Internet of Things (IoT) interface: Remote monitoring of valve status (opening, torque, temperature)

(4) Sealing System
Soft seal (PTFE/PEEK): Suitable for clean water and petroleum products ≤150°C, with ANSI VI sealing class.

Solid Metal Seal (STL Tungsten Carbide): High temperature resistant (≤550°C), wear-resistant, suitable for steam and media containing particles.

Double seal design: main seal emergency lubrication seal (API 6D standard).

2. Typical Applications

(1) Oil and natural gas
Trunk pipelines (e.g., the West-East Gas Pipeline and the China-Russia East Line)
LNG receiving stations (ultra-low temperature conditions)
Shale gas production (high-pressure sulphur-containing medium)
(2) City heating and electricity
Regional network of heating mains (high-temperature hot water/steam)
Power plant boiler system (feedwater/high-pressure steam control)
(3) Chemicals and water
Large chemical plants (corrosive media management)
Municipal water supply (high-flow water network)

Large-diameter electric welded ball valves have become the core equipment for modern energy and industrial pipelines due to their high-strength welded structure, intelligent control, and great flow adaptability. They are particularly suitable for high-pressure, long-distance, and automation scenarios, and are a key component of smart pipeline network construction.