The fluorine-lined centrifugal pumps delivered this time are equipped with a Plan 53A pressurized flush system for double mechanical seals complying with API 682 standards. As a closed barrier fluid flush plan, Plan 53A comes with a pressurized barrier fluid reservoir, heat exchange assembly and pressure monitoring unit. The barrier fluid is pre-pressurized and maintained at a pressure higher than that of the process fluid inside the pump cavity, forming a dependable barrier to effectively prevent leakage of process media to the atmosphere. Meanwhile, it continuously lubricates and cools the seal faces, reducing risks of dry running and overheating damage, and greatly extending the service life of the mechanical seal.

Unlike conventional flush plans, Plan 53A requires no external process fluid and adopts a closed-loop circulation of barrier fluid. It is especially suitable for the transportation of toxic, volatile and highly hazardous media, meeting core requirements for safe production, environmental control and zero leakage on site.

In the early stage of the project, the technical team of Teflow conducted in-depth communication with the customer on operating parameters. Pump selection, seal system matching and solution confirmation were completed based on media properties, operating temperature, pressure, running duration and other conditions. During production, manufacturing was carried out in strict accordance with process specifications with rigorous checks at key procedures. Before shipment, hydrostatic test, air tightness inspection, pressure holding test of the seal system and complete machine running test were performed sequentially. All indicators were verified to be qualified to guarantee stable commissioning of the pump package on site.

Reliable fluid handling equipment is critical to safe chemical production. Teflow keeps focusing on anti-corrosion pumps and valves, serving a wide range of harsh corrosive working conditions. Customized fluid transfer solutions are available to meet individual customer requirements. We will continue to provide technical coordination and after-sales support, and help customers achieve smooth commissioning as well as safe and efficient operation of projects with reliable products and professional expertise.