Fully welded underground ball valve with extended stem and pressure relief function

A special valve designed for high-pressure underground gas pipelines, integrating four main functions: fully welded valve body, elevated valve neck, direct underground installation, and pressure relief. The valve adopts an integral welded design and can be directly buried underground without the need for a well for the valve. It is also equipped with an elevated valve stem extension device and pressure relief system to ensure that the valve can still operate easily in deep lying conditions and safely relieve the pressure of the valve cavity when closing. It is suitable for key nodes such as main pipelines and urban high-pressure gas pipeline networks.

Main features:
● Fully welded valve body – one-piece forging and welding, no external leakage points, withstand pressure up to class 150~600 (PN16~PN100).
● Raised valve neck design – The valve stem is extended to the ground, which is convenient for operation and maintenance in deep lying conditions (the depth can reach 3~5 meters).
● Dual Release Function – Vent and Drain, in accordance with API 6D DBB (Double Shutdown and Drain) standards.
● Intelligent anti-corrosion system - The valve body has 3PE/FBE anti-corrosion coating, optional cathodic protection interface, suitable for highly corrosive soil.
● Zero Leakage Seal – Metal Hard Seal, Soft Seal, Double Insurance, ISO 5208 Level A Leak Test Passed.
● Flame Retardant & Anti-Static – In accordance with API 607/API 6FA fire protection standards, the valve stem grounding design eliminates the risk of static electricity.
● Remote Control – Supports electric and pneumatic actuators and can be connected to a SCADA system for automated control.