◆ The DBB ball valve has double shut-off, double shut-off and relief function valves. The valve with double shutoff and double cutoff and relief function is suitable for aviation kerosene, light oil, natural gas, liquefied gas, pipeline gas, chemical medium and other pipelines, as an ideal device to cut off the medium.

◆ The key to the working principle of the double-off, double-off and relief valve is the action of the two sealing slides installed on the cock.

◆ The valve has an automatic relief device (optional), after the valve is completely closed, it prevents abnormal pressure increase in the valve cavity and checks the effect of the valve. The valve switch indicator is synchronized with the switch position, which can accurately display the valve switch status.

Design Feature+

◆ During the opening and closing of the valve, there is no contact between the sealing surface of the valve body and the sealing surface of the sliding plate. Therefore, the sealing surface has no friction and wear, the valve has a long service life, and the switching torque is small.

◆ When repairing the valve, there is no need to remove the valve from the pipeline, just remove the valve bottom cover and replace a pair of sliding plates, which is very convenient for maintenance.

◆ The diameter of the valve body and cock is reduced, which can reduce the cost.

◆ The inner cavity of the valve is plated with hard chrome, and the sealing area is hard and smooth.

◆ Compact size and low weight, thereby greatly reducing the required space and supporting structure.

◆ Import and export closure, discharge and isolation.

◆ Fire-resistant structure. After a fire, each leakage part is designed to be flexible graphite packing or stainless steel with graphite to meet the fire resistance requirements.

◆ The valve stem anti-flying structure, convenient for online replacement of packing.

◆ The valve has a full diameter, which is easy to clean the pipeline, has small flow resistance and strong flow capacity.

Design Standard+

◆ Design: API 6D / API608 / B16.34

◆ Face to face: API6D / ASME16.10

◆ Flange end: ASME B16.5 / ASME B16.25 / B16.11

◆ Test: API598 、API6D、ISO5208

◆ Fire safe: API607 / API6FA

Technical Specification+

◆ Size: 2”~24”

◆ Class: 150Lb~2500Lb

◆ Temperature: -196~500℃