Introduction Nautilus Plug

FluoroSeal®, Non-Lubricated, Sleeved Plug Valves incorporate state-ofthe- art PTFE fluorocarbon seat design. With little required maintenance and trouble-free operation, a high integrity bubble-tight seal is provided both inline and to atmosphere. The engineered design features contributing to the superiority of our product are described as a function of their specific purpose to ensure a trouble-free extended life.

Valvola a maschio - Sistema di tenuta e regolazioni EZ-SEAL
PTFE fluorocarbon, utilized in the FluoroSeal® sleeve and top seal components, is universally resistant to corrosive media, being inert to all but a few rarely encountered chemicals. It is a thermoplastic that can be used at a continuous service temperature of 400°F (204°C) and much higher temperatures can be satisfactorily sustained for shorter periods. Having a very low friction coefficient it is self-lubricating, negating the need for any other form of lubrication. Since PTFE is susceptible to deformation or cold flow as it is put under load, and as it becomes more pliable at elevated temperatures, precaution is taken to control this activity for the valve’s intended purpose.
The FluoroSeal® internal body configuration has been designed to totally contain all the edges of the PTFE sleeve at the top, bottom, and around the entire port opening adjacent to the waterway. Any tendency of the sleeve to grow is accommodated by relief recesses designed for this purpose and positioned at 90 degrees to the body port openings. The port-defining metal lips protect the PTFE sleeve from erosion and any possibility of sleeve rotation within the body.
The waterway in the body has been designed with a contour providing a flow path that assures minimum flow turbulence characteristics. The critical sealing areas around the top and bottom of the sleeve and around the body port openings are maintained by means of an adjustable tapered plug compressing the PTFE sleeve over raised ribs. The PTFE top seal components are similarly contained and protected from damage. A counter bore is provided at the top of the metal body to encapsulate the outside diameter of the formed PTFE diaphragm in conjunction with the formed metal diaphragm and to protect it fromThe inside diameter of the formed PTFE diaphragm, adjacent to the plug stem, is also contained by means of a unique lip design of the formed metal diaphragm preventing extrusion and maintaining the stem seal throughout variable service conditions. This uniquely formed metal diaphragm also provides a positive electrical ground between the plug and body, eliminating the need for an extra component to fulfill this function as is the case for other valve manufacturers’ designs.


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