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Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...
NASH also developed vacuum pumps [1] [2] which were applied in the manufacture of pulp and paper and in the sugar industry. [ 3 ] [ 4 ] [ 5 ] During the mid-20th century, NASH continued expanding into industrial markets such as paper, power, petrochemical, general industrial and food markets.
Lewis H. Nash (c. 1852 – November 11, 1923) was an American engineer who invented the liquid-ring-vacuum pump, and was the holder of over a hundred United States patents for pumps, engines, and other equipment. He founded the Nash Engineering Company in 1905, and served as a member of the Connecticut House of Representatives.
The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]
Bonded seal, also known as Dowty seal or Dowty washer. A type of washer with integral gasket , widely used to provide a seal at the entry point of a screw or bolt [ 2 ] [ 3 ] Bridgman seal , a piston sealing mechanism that creates a high pressure reservoir from a lower pressure source
By definition, the seal ring is the axially flexible member of the end-face mechanical seal. The design of the seal ring must allow for minimizing distortion and maximizing heat transfer while considering the secondary sealing element, drive mechanism, spring and ease of assembly. Many seal rings contain the seal face diameters, although this ...