Fully Welded Trunnion Ball Valve with Bypass and Drain - Reliable China Suppliers and Factory Solutions

A fully welded body eliminates flange joints and external leakage points, making it especially suitable for buried pipeline applications where long-term leak-free performance is critical. This design significantly reduces maintenance requirements and improves overall safety.

Unlike floating ball valves, trunnion mounted balls are mechanically anchored at the top and bottom, which significantly reduces the operating torque required. This design provides consistent and reliable sealing performance even under high-pressure conditions, extending the valve's service life.

In large diameter or high-pressure pipelines, differential pressure across a closed valve can make opening extremely difficult. The integrated bypass system gradually equalizes pressure on both sides of the valve before opening, enabling safer, smoother operation and reducing mechanical stress on valve components.

The built-in drain valve is used during maintenance or inspection to safely relieve cavity pressure trapped between the valve seats and to drain residual fluids from the pipeline section. This prevents hazardous pressure buildup and ensures worker safety during servicing operations.

The heavy-duty epoxy coating is specifically formulated to protect the valve body against corrosion in challenging environments, including underground buried installations with soil moisture and chemicals, as well as outdoor applications exposed to humidity, UV radiation, and temperature fluctuations.

The ISO 5211 standardized mounting pad provides a universal interface that allows direct mounting of pneumatic, electric, or hydraulic actuators without the need for additional adapters or custom brackets. This makes it easy to automate the valve at any point in its service life, supporting flexible system upgrades and remote operation capabilities.