Description

Description:

The DBB Ball Valve is a double-close and double-drain (double break) relief valve.

The key to the working principle of the valve with double closing, double breaking, and discharge functions is the action of the two sealing slides installed on the cock. Please get in touch with us if you’d like further information!

Valve closed:

After the valve is closed, turn the cock and sealing sliding plate by ninety degrees using the hand wheel. The user then moves the cock downward, pushing the sealing sliding plate in the direction of the valve body’s inner cavity cover. until the elastic sealing ring, while evenly applying pressure to the top and bottom ends of the valve opening, forms a seal.

Valve opening:

To lift the cock and remove the sealing sliding plate from the sealing surfaces on either side of the valve body, first twist the hand wheel to open the valve. Proceed to rotate the handwheel until the sliding plate has fully retracted and parted from the valve body’s sealing surface. As a result, the valve is in the open position, and the cock and seal slide spin 90 degrees.

Advantages of DBB Valve and DIB Valves

After that, we’ll quickly go over the uses and benefits of DBB and DIB. Both upstream and downstream isolation is possible with DBB or DIB valves. Both high pressure and high temperatures can be employed with it. In situations when a leak through the valve could have serious repercussions, this isolation is essential. After isolating the fluid, the discharge mechanism can discharge the space between two valves or two seating surfaces. For integrity tests or maintenance that may track leaks, this is crucial.

Both DBB and DIB valves save space. Additionally, it lessens the requirement for pricey multi-valve systems. Additionally, it offers 0% potential for leakage from upstream to downstream. This kind of valve also makes it possible to examine the seat seals’ integrity. Double plugging and relief valves as well as double isolation and relief valves are useful in a range of oil and gas applications and markets. For instance, petrochemical, transmission and storage, liquefied natural gas, and industrial natural gas operations. Liquid pipelines and refined product distribution pipelines both have main pipes and manifold valves. DBB gate valves have fully protected seating surfaces, double block discharge, and through conduit. It is hence appropriate for applications involving liquid pipelines.

Application of DBB Valve

When needing critical isolation, apps use both DIB and DBB. This guarantees there won’t be any leaks. The kind of option chosen will depend on the application and service type. For example, double expansion gate valves with DBB capabilities are best for isolating liquid services that are close to waterways or cities. They are often unaffected by vibration or variations in pressure since they simultaneously provide strong mechanical seals upstream and downstream.

Instrument calibration is another use for DBB and DIB valves. The instrument system’s shut-off valves must all be firmly sealed. Erroneous instrument factors will persist until the next calibration procedure, even with tiny leaks causing calibration problems. Therefore, this could cost end users a lot of money. Almost always, the right calibration may be achieved by choosing the appropriate API-validated DBB Ball valve or DIB valve.

The double-check valve pushes the downstream and upstream seals against the valve body using a mechanical wedge action. This indicates that the positive seal can be affected without the aid of line pressure. When choosing between the API and OSHA definitions, as well as whether to utilize DIB or DBB ball valves. Thus, it’s critical to comprehend parallels and variances in detail. For the factory acceptance test of the valve, it is very important to think about what it will be used for and make sure that all of its necessary features for isolation are carefully checked.