Ball Valve With Dbb

It reduce the leakage point in the system save installation space and r educe the pressure of the pipeline system. Dbb ball valve made by resta china is designed to replace the multiple valve connections in traditional pipelines. Double block bleed floating type the design of bfe ball valves is based on the floating ball principle which allows the ball to turn freely between the ball seals.

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Well i try to explain it in a few words without going to deep into the technical details.

Ball valve with dbb. One ball block valve will isolate the upstream of medium while the other will shut off the downstream. This dbb ball valve will house two ball block valves and one ball bleed valve. For example the british valve and actuator association bvaa defines dbb as a manifold that combines one or more isolation valves usually ball valves and one or more bleed vent usually a needle style global valve into one assembly for interface with other components e g pressure measurement transmitters pressure gauges and switches. A positive seal is attained by fluid pressure act ing on the upstream surface of the ball and producing a constant uniform contact between the downstream ball seal and the.

Lately i was often asked about the difference between a floating and a trunnion ball valve. Ydb valves llp is an iso 9001 2015 certified manufacturing company in india for forged three piece body dbb valve dbb type double block and bleed ball valve. Status quo ball valves. The compact design saves weight.

When both ball block valves are tightly sealed the flow of medium to and from the machinery will stop. As per api 6d a double block and bleed ball valve is a single valve with two seating surfaces each of which in the closed position provides a seal against pressure from both ends of the valve with a means. People usually get really confused about how to differentiate a dbb ball valve from a dib ball valve. Dbb means double block and bleed.

You can then open the side of dbb valve that is connected to. These dbb valves are designed to offer one valve solution available in most sizes to fit in the same space as a single ball valve asme b16 10 overall length or with the shortest possible face to face dimension giving true double isolation for maximum safety and reducing process problems due to valve leakage. This would be too much for this post. Please find above double block and bleed valve diagram please contact us for double block and bleed valve catalog and prices.

So this type valevs are widely used in power petrochemical metallurgical marine petroleum natural gas gas pharmaceutical and other industries.