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Radial shaft seal of Romo washing machine pump. Radial shaft seals, also known as lip seals, are used to seal rotary elements, such as a shaft or rotating bore.Common examples include strut seals, hydraulic pump seals, axle seals, power steering seals, and valve stem seals.
A double seal consists of two sets primary sealing surfaces with the space in-between the two seals filled with a compatible pressurized fluid called the barrier fluid. This barrier fluid/space may be monitored to detect performance of the assembly. Unfortunately, the definition of “double seal” was often stated in a confusing manner.
A seal is a device or material that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets .
A sound stuffing box installation is critical to safety because failure can admit a catastrophic volume of water into the boat. In a common type of stuffing box, rings of braided fiber, known as shaft packing or gland packing, form a seal between the shaft and the stuffing box.
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Tandem seal with intermediate labyrinth; Double opposed seal - Used when the processed gas is abrasive (like hydrogen) and lower pressure designs. All designs use buffering with "dry" gas, supplied through control and purification systems. All Dry Gas Seals need additional protection from the process and the bearing lubrication sides of the seal