your best partner for vacuum


The EVR-series are robust Vacuum Roots Booster Pumps

These Roots pumps are excelent tools to boost up your pumping speed and the reach a much better ultimate vacuum. These EVR-series Roots pump are useally combined with the pre-vacuum pumps of the following series: EV-series, EVD-series. The pumps will be supplied with bypass system and valve, this bypass system allows the Roots pump to be started already at atmosphere at the same time as the pre-vacuum pump. The pump has a magnetic drive, this magnetic drive eliminates allows the pump to run without a shaft seal, so it reduces downtime and service costs. Due to the lower ultimate vacuum the pump is oftenly used in applications like:

  • Vacuum packaging
  • Vacuum metallurgy
  • Thin film coating
  • Spae simulation
  • Freeze drying
  • Vacuum impregnation
  • Low density wind tunnels
  • Vacuum distillation
  • Drying and de-gassing

Part Number

Ordering information Art.No.
EVR-125BM (with bypass and magnetic drive); 3 phase; 230V; 50/60Hz 660031


Specification Unit 50 Hz 60 Hz
Nominal displacement m3/h 108 127
Ultimate vacuum mbar 3×10-4 3×10-4
Delta P of the relieve valve mbar 50 50
Motor power kW 0,75 0,75
Nominal speed rpm 2825 3400
Type of protection IP 55 55
Oil filling for the gearbox ltr 0,8 0,8
Weight (BM version) kg 87(92) 87(92)
Noise level dB 68 70
Connection inlet DIN 63 63
Connection outlet DIN 63 63


Accessoires Art.No.
Adapter set for ISO-K flanges; Inlet DN 63 ISO-K 660701
Adapter set for ISO-K flanges; Outlet DN 63 ISO-K 660702


Consumables Art.No.
Sealing kit for EVR-125BM 660931
Maintenance kit for the EVR-125BM 660932
Standard oil filling 1 ltr 100400

Pumping speed curve




Dimensions (mm) L0 L1 L2 L3 L4 H1 H2
EVR-125 660 175 120 360 15 270 40
H3 W1 W2 W3 4-ØC
100 220 270 145 4-Ø14