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API Standard 682, titled "Pumps - Shaft Sealing Systems for Centrifugal and Rotary Pumps," is the American Petroleum Institute standard for end-face mechanical seals. [1] The purpose of API 682 is to assist in the selection and operation of end face mechanical seals in centrifugal pumps. It is based on the combined knowledge and experience of ...
2004 - Thompsons Kelly & Lewis [15] (Australian supplier of centrifugal pumps [16]) 2005 - Interseal assets (from Australia-based Ludowici Mineral Processing Equipment Pty Ltd. [17]) 2006 - HydroTechnik (privately held mechanical seal manufacturer based in Olomouc, Czech Republic [18]) 2007 - MF Sealing Systems (British industrial pump and seal ...
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 .
By 1938, all Chrysler cars used Crane Packing mechanical seals [7] on their water pumps . [5] [8] In 1939, the company invented the first automotive mechanical seal. [9] In the early 1940s, John Crane developed and introduced patented end face shaft seals and an elastomer bellows seal.
A hydrodynamic seal is a type of mechanical seal. A hydrodynamic seal uses a dynamic rotor with grooves that act as a pump and create an air film that the opposing sealing surface will ride on. A hydrodynamic seal performs better than hydrostatic seals by providing greater film stiffness, lower leakage and lower lift off speeds.
The O-ring was developed in the 1930s but not used in mechanical seals until after World War II. In the late 1930s, probably about 1938 or 1939, mechanical seals began to replace packing on automobile water pumps. The famous Jeep of WWII used a rubber bellows seal in the water pump. After WWII, all automobile water pumps used mechanical seals.
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