Kobelco Eagle Marine Inc.

KOBELCO EAGLE EVK TYPE WATER LUBRICATED
STERN TUBE SEAL

KOBELCO EAGLE MANUFACTURES THE EVK TYPE WATER SEAL. THE EVK
TYPE SEAL HAS MANY BENEFITS FOR OWNERS AND OPERATORS OF VESSELS
WITH WATER LUBRICATED SHAFTING. THE EVK TYPE SEAL IS THE EASIEST OF
THE SEALS ON THE MARKET FOR INSTALLATION AND OPERATION. THE SEAL
DOES NOT WEAR THE PROPELLER SHAFT SLEEVE AND MAINTENANCE
INCLUDING CHANGING THE SEAL CAN BE COMPLETED WHILE THE VESSEL IS IN
THE WATER.

THE DESIGN OF THE KOBELCO EAGLE EVK TYPE SEAL IS VERY SIMPLE. IT
CONSISTS OF A RUBBER LIP SEAL ROTATING WITH THE SHAFT. THE LIP SEALS
AGAINST A STATIONARY MATING RING MADE OF STAINLESS STEEL. THE SEAL
CASING IS MADE OF CAST BRONZE. INSIDE THE HOUSING IS AN INFLATALBLE
SEALING RING WHICH CAN BE USED TO REPLACE THE ACTIVE SEALING RING.
ALL SEAL ASSEMBLIES ARE SUPPLIED WITH AN ACTIVE SEAL AND A SPARE
SEAL WHICH IS INSTALLED ON THE SHAFT READY FOR INSTALLATION.

STERN TUBE SEAL TYPES

STERN TUBE SEALS WERE DESIGNED TO REPLACE TRADITIONAL STUFFING BOXES. THERE ARE
SEVERAL TYPES AVAILABLE ON THE MARKET TODAY. KOBELCO EAGLE BELIEVES THAT THE LIP
TYPE SEALING SYSTEM IS THE BEST FOR MARINE PROPULSION SHAFTING DUE TO THE MOVEMENT
OF SHAFTING DURING OPERATION. THERE ARE MECHANICAL FACE TYPE SEALS AVAILABLE, BUT
THIS TYPE OF SEALING SYSTEM IS BETTER SUITED TO PUMPS SINCE THE SHAFTING IS FIXED,
USUALLY BY ROLLER BEARINGS. THE LIP TYPE SEAL CAN TAKE UP BASICALLY UNLIMITED AXIAL
SHAFT MOVEMENT AND A VERY HIGH RADIAL SHAFT MOVEMENT.

REPLACEMENT PARTS

MOST SEALS FOR SALE TODAY INCLUDE SOME TYPE OF PROVISION FOR REPLACEMENT WHILE
THE VESSEL IS IN THE WATER. IT IS IMPORTANT THAT THE SEAL CAN BE REPLACED WITHOUT
REMOVING THE SHAFT. KOBELCO EAGLE IS THE ONLY SEAL AVAILABLE WITH THE SPARE SEAL
ALREADY ON THE SHAFT READY FOR QUICK INSTALLATION. THERE IS NO SEAL ON THE MARKET
THAT DOES NOT REQUIRE REPLACEMENT PARTS. IT IS RECOMMENDED THAT SPARE PARTS
PRICING BE INCLUDED IN YOUR DECISION ON WHICH TYPE OF SEAL TO PURCHASE.

TECHNICAL SUPPORT

KOBELCO EAGLE PROVIDES TECHNICAL SUPPORT FOR NEW INSTALLATIONS AND ONGOING
SUPPORT FOR EXISTING INSTALLATIONS. WE WORK WITH OUR CUSTOMERS DURING EVERY
PHASE OF THE INSTALLATION PROCEDURE. THE FACTORY WILL PROVIDE DRAWINGS FOR
INSTALLATION AND IN MANY CASES WE WILL PROVIDE ON SITE INSTALLATION ASSISTANCE AT
NO CHARGE. WE ALSO HAVE FACTORY TRAINED SERVICE AGENTS AVAILABLE FOR
ASSISTANCE.

A TECHNICAL PAPER IS AVAILABLE FROM KOBELCO EAGLE DESCRIBING THE STERN TUBE SEAL,
DEISGN PRINCIPLES, FUNCTIONS AND FEATURES. PLEASE CONTACT ONE OF THE OFFICES AND WE
WOULD BE HAPPY TO EMAIL IT TO YOU.