Basic knowledge of vacuum pump

Vacuum：Refers to the rarefied gas state in a given space where the pressure is lower than the local atmospheric pressure

Vacuum degree：The rarefaction of gas in a vacuum state can be expressed by negative pressure or absolute pressure. Commonly used units are: Torr, Pa, mbar

Ultimate vacuum：It refers to the maximum vacuum degree that the vacuum pump can reach. The vacuum limit is marked on the nameplate of the vacuum pump.

Effective vacuum：Refers to the actual vacuum degree of the customer during the production process, also known as the operating vacuum. When selecting a vacuum pump, the effective vacuum should be two orders of magnitude lower than the limit vacuum.

Evacuation rate：Under certain pressure and temperature, the gas extracted from the pump inlet per unit time is called the pumping rate, abbreviated as pumping speed. The pumping speed is divided into intake pumping speed and standard pumping speed. The intake pumping speed is marked on the nameplate, unit: m3/h, L/s, m3/min

Conductance：Indicates the ability of a vacuum pipe to pass gas. Under stable conditions, the pipe conductance is equal to the pipe flow divided by the pressure difference between the two ends of the pipe. The unit is: (L/s)

Leakage rate：The vacuum system leak rate refers to the flow rate of a specific gas through the leak hole under specified conditions, unit: Pa·L/s

Vacuum pump unit conversion

*Pumping speed calculation: Q = V/t*ln(P1/P2)

Q: Pumping speed or actual volume flow, unit: m/min

V: Volume of vacuum chamber or vacuum system, unit: m

t: Time required to evacuate to target vacuum, unit: min

P1: Pressure at the start of evacuation, in absolute unit: mbarA

P2: Target pressure (target vacuum) to be reached by evacuation, in absolute unit: mbarA

Varlable Pitch Dry Screw Vacuum Pump Technical Parameters

Installation Dimensions

Varlable Pitch Dry Screw Vacuum  Pump Features

■Patented profile, variable pitch high-efficiency screw rotor

■Clean and oil-free, energy-saving and environmentally friendly

■High pumping speed, low ultimate pressure 2Pa

■Nitrogen purge to prevent the medium from entering the gearbox

■Applied in lithium batteries, electronics, chemicals, medicine, aviation simulation and other fields