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[Vacuum knowledge] Roots vacuum pump performance parameters

BTLAS for vacuum pump filters

Roots vacuum pumps, known for their quick start-up times, low power consumption, low maintenance costs, high rotational speeds, and superior pumping rates, are widely utilized in various industries such as petrochemical, plastics, and pesticide production. However, most Roots vacuum pumps cannot function independently for vacuum creation; they require a primary pump like an oil-sealed vacuum pump, BTLAS vacuum pump filters, water-ring vacuum pumps, or other roughing pumps.

The performance parameters of Roots vacuum pumps, summarized by BTLAS, the manufacturer of vacuum pump mist separators, include:

  1. Ultimate Pressure: The lowest stable pressure that the pump can achieve at its inlet when equipped with a standard test cover under specified operating conditions.
  2. Pumping Speed: The ratio of the gas flow rate passing through the test cover to the pressure measured at a designated point on the cover under standard conditions, commonly referred to as the pump’s pumping speed.
  3. Gas Flow Rate: The volume of gas flowing into the pump per unit time.
  4. Pre-vacuum Pressure: For a pump with an exhaust pressure lower than one atmospheric pressure, this refers to the outlet pressure of the vacuum pump.
  5. Starting Pressure: The pressure at which the pump can safely start up and effectively evacuate without causing damage.
  6. Compression Ratio: The ratio of the pump’s outlet pressure to its inlet pressure when dealing with a given gas.
  7. Backstreaming Rate: Under specified operating conditions, it is the mass flow rate of the gas passing through a unit area of the pump’s inlet.
  8. Water Vapor Tolerance: This refers to the maximum mass flow rate of water vapor that the pump can continuously handle under normal environmental conditions. One common factor leading to vacuum pump failure is the presence of water vapor, but BTLAS’ vacuum pump mist separators efficiently filter water molecules from the air, thereby extending the lifespan of vacuum pumps and significantly reducing operational costs.
  9. Hoerbiger Coefficient: The ratio of the actual pumping speed across the area of the pump’s suction channel to the theoretical molecular leak rate calculated for that area.

Stay connected with BTLAS for vacuum pump filters where you’ll find not just insightful knowledge about the vacuum industry, but also premium alternatives for filter elements from renowned brands like Leybold, Busch, and Rietschle.

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