What requirements should be raised to the manufacturer when purchasing welded ball valves?

Release time:

2020-03-18

Welded ball valves utilize a special structural design and welding quality

Welded ball valves utilize a special structural design and welding quality, with defined standards for weld quality. The connection between the welded ball valve and the main pipeline is achieved through welding. When ordering valves, customers should request that the manufacturer add 1.0m long sleeves to both ends of the valve. If the weld is substandard, there will be sufficient length to cut out the substandard weld and re-weld it. When welding the ball valve to the pipeline, the valve should be in the 100% fully open position to prevent damage to the ball valve by welding spatter and to ensure that the temperature of the internal seals does not exceed 140 degrees Celsius. Appropriate cooling measures can be taken if necessary.
Welded ball valves employ a special structural design, featuring maintenance-free characteristics. Before underground burial, a special Pu anti-corrosion coating is applied to the exterior of the valve. Three injection tubes are also installed: one for the valve seat and stem emergency lubrication, one for the cavity venting, and one for the valve stem, extended appropriately according to the burial depth, allowing personnel to perform operations from ground level. After direct burial, a small valve hand well can be constructed. In contrast, conventional non-welded ball valves cannot be directly buried and require large valve wells, creating potentially dangerous confined spaces detrimental to safe operation. Meanwhile, the valve body itself and the bolted connections between the valve body and the pipes are susceptible to corrosion, impacting the valve's service life.

Cleaning of valve parts from fully welded ball valve manufacturers

2020-03-18

The valve chamber contains non-metallic sealing material

Welding is also the last process after the assembly of the product.

2020-03-18

The manufacturing process of welding ball valves is tracked and monitored by advanced computer detection instruments.

The sealing ring body uses RPTFE material with 25% Carbon content

2020-03-18

Reducing the erosion of welding ball valve surfaces by stains can extend its service life

After using the welded ball valve for a period of time

2020-03-18

For fire hydrant control fully welded ball valves in high-rise buildings, signal valves should be used.