Eagle Engineering Aerospace, backed by years of research and practical experience, has developed an extensive variety of designs for the manufacture of dynamic seals that meet specific requirements in diverse applications.

MAINSHAFT FACE TYPE SEALS
Face type seals used on large engine mainshafts are similar in construction to conventional our compact mechanical seals, but have additional characteristics to handle the surface speeds, temperatures and pressure typically required of such applications. The carbon seal ring stator is housed into a metal carrier and is spring loaded against the mating ring by a series of coil springs. Due to the temperature requirements, elastomers are not used. Instead, the secondary seal is one or two piston rings comprised of metal carbon graphite, or Teflon jacketed spring seal. At high speeds and pressures, some seals are configured to introduce oil lubrication directly at the interface, and is achieved by a flow of oil introduced through lubrication at the interface.
A mating ring is usually located next to bearing.
In the case of the seal for high-speed application, since there is also much higher heat generation from a mating ring, this heat generated by friction must be efficiently removed. Then, a good heat conductivity and also a good wear resistance material is used. In order to acquire a good seal performance, the roughness of the surface of a mating ring, and a surface deflection must be controlled minimum.
For this reason, a design must be surveyed from the point of minimizing deflection in various conditions.
SEGMENTED SEALS
Circumferential segmented seals are designed to seal gases. For high viscosity fluids which would tend to hydradynamically lift the segments and lead to unacceptably high leakage, a special design must be used. The most common applications for circumferential segmented seals are mainshaft seals in state-of-the-art jet aircraft engines and gas turbines. Our segmented circumferential seals also have a wide range of applications in rotating machinery such as compressor, blowers, etc. Circumferential segmented seals are ideal for high performance equipment where large axial shaft movements, space requirements, weight reduction and/or efficiency are major concerns. The seals are comprised of a set of segmented carbon rings which contact the shaft ( or runner ) to form a circumferential dynamic seals.
COMPACT MECHANICAL SEALS
Compact mechanical seal is a stationary, "face" type seal designed for a wide array of applications: from aircraft engine accessory gearboxes and mainshafts, to hydraulic pumps, starters, compressors, industrial generators and other high speed rotating machinery. Based on application requirements and extensive history of material studies in EEA's Chemical and Metallurgical studies, a wide spectrum of materials and designs are available. Typical custom engineered seal configurations which were developed as solutions for particular operating conditions are also available on requests. Designs based on the performance data described, have a minimum expected service life of several years.
A mating ring is usually located next to bearing.
In the case of the seal for high-speed application, since there is also much higher heat generation from a mating ring, this heat generated by friction must be efficiently removed. Then, a good heat conductivity and also a good wear resistance material is used. In order to acquire a good seal performance, the roughness of the surface of a mating ring, and a surface deflection must be controlled minimum.
For this reason, a design must be surveyed from the point of minimizing deflection in various conditions.
SPECIAL APPLICATION SEALS
NASDA (National Space Agency of Japan) is developing the H-IIA rocket in response to varied future demands in space transport including satellite launch and the ferrying of logistics in conjunction with International Space Station construction. Building on successes achieved with the H-II rocket, Japan's primary launch vehicle of the 1990s, the H-IIA rocket program is aimed at realizing a highly reliable vehicle with minimal launch cost. In this important national project, EEA has played important roll of developing rocket engine seals. These seals are used in liquid oxygen service or liquid hydrogen turbo-pumps for the primary propulsion rocket engine.s
FLOATING-RING SEALS
Floating-ring seals provide dependable shaft sealing where speeds, temperatures, and lack of lubrication prohibit the use of conventional face-type seals. This type of seal is excellent for sealing hot gases from bearings or other mechanisms. In addition to being able to operate in conditions beyond the capability of face-type seals, these simple seals offer other significant advantages. It minimized leakage due to controlled clearance. Unlimited axial shaft movement. Long life because of limited rubbing and wear. Very low heat generation. Reduced coking. Simpler to install than face-type or segmented seals. Compact package works within space limitations of new compact turbine designs.