Zero spillage the Dry break Coupling in the petrochemical field

The petrochemical environment is full of high - risk inflammable and explosive goods, is a national high - risk industry. SME Industry has the honour to provide professional and safe fluid connection solutions for the petrochemical market. Shengjiang's newly produced "zero-drip” dry break coupling is specially designed for high-end petrochemical fluids -- supply, supply, input and output operations. It is non-destructive, low consumption, safe， fast, and provides a strong guarantee for the safe transportation of petrochemical fluids.

The petrochemical pipeline connecting ways, especially by moving the hose on the tank to dock depot accesses the connection pipes, from the early standard flange bolt connection (individually dismantling bolt of six to eight or even more), the evolution to the current common quick connectors on the market, namely the claw clasp type coupling - SME industrial Camlock coupling, improve operation efficiency.

However, the on-off process of Camlock coupling does not have the effect of blocking the fluid (bottom left figure). In practical application, it is necessary to add valves in both sides of the pipeline, such as a ball valve globe valve, etc., to achieve the purpose of cutting off the flow.

The operation is still not simple enough, and there are hidden dangers. When the circulation media is harmful to the environment or personal safety, this operation method needs to be improved urgently.

The design of SME Dry break coupling takes this as the starting point and gives consideration to the requirements of fast opening and closing and the priority of opening and closing. Through the built-in cut-off valve device of the joint, the "zero overflows" disconnect operation is completed in an instant according to the order of first closing the pipe and then disconnecting the joint, which is efficient and reliable (figure below right).

SME Dry break coupling can be operated by a single person without auxiliary tools and other storage devices. When using the dry connector, the operator only needs to put the female head on the male head and turn the handle clockwise (about 100° Angle). After it is in place, the sealing surface is completely closed. At the same time, the internal valve mechanism has been fully opened to realize pipeline connection. Reverse counterclockwise rotation, that is, the completion of the valve and disconnect the joint operation, at one go!

On and off operation, one time not more than 5 seconds. Such efficient the operation itself reduces the risk of operational error or potential leakage. Because the special structure inside the dry joint can perfectly realize two-way blocking at the end of transmission and disconnection, so as to achieve the standard of almost zero leakage, and then the purpose of safety and material saving of the staff is also perfectly realized.

In emergency projects (such as tank trucks, ship supplies, etc.), the advantages of these features will be more obvious, and the essential reasons include that the dry internal structure is non-dead Angle design, the inner the wall is smooth, and the pressure drop is small. This means that in the process of fluid transport, the high-speed flow can be sustainably maintained, and the SME Dry break coupling has a large flow and small flow resistance loss. The following figure shows the pressure differential flow chart of each Cv specification, using the experimental data of 20°C normal temperature water.

According to the operation requirements, the internal gasket of SME Dry break coupling can be made of high-quality materials such as PTFE, fluoroelastomer, EPT, BUNAN, or industrial-grade silica gel. Common sealing material temperature tolerance is as follows. The metal components can also be made of light aluminium alloy, industrial grade 316 stainless steel with better corrosion resistance, or even super high corrosion-resistant materials such as Hastelloy alloy.

In addition to the advantages of fast opening and closing and zero overflow, SME Dry break coupling has many features, such as small torque, more in line with the principle of engineering, strengthened aluminium alloy shell, especially anti-fall explosion-proof. For more technical and commercial information, please contact our fluid specialist at SME Industry.