Edwards EH Roots pump series
The Edwards EH Roots pump series at a glance: 5 models from the field of Roots vacuum pumps – with technical data, variants and the option to send an enquiry.
- 5Models
- 310–4,140m³/h pumping speed at 50 Hz
- 2.2–11kW rated motor power at 50 Hz

Product overview
Products of the Edwards EH Roots pump series
Each row leads to the model with its technical data and variants.
Edwards EH250Pumping speed 310 m³/h 50 Hz375 m³/h 60 HzRated motor power 2.2 kW 50 Hz2.2 kW 60 HzVariants 8
Edwards EH500Pumping speed 505 m³/h 50 Hz605 m³/h 60 HzRated motor power 2.2 kW 50 Hz2.2 kW 60 HzVariants 8
Edwards EH1200Pumping speed 1,195 m³/h 50 Hz1,435 m³/h 60 HzRated motor power 3 kW 50 Hz3 kW 60 HzVariants 8
Edwards EH2600Pumping speed 2,590 m³/h 50 Hz3,110 m³/h 60 HzRated motor power 11 kW 50 Hz11 kW 60 HzVariants 8
Edwards EH4200Pumping speed 4,140 m³/h 50 Hz4,985 m³/h 60 HzRated motor power 11 kW 50 Hz11 kW 60 HzVariants 8About the series
Features and benefits of the EH series
The series at a glance
The Edwards EH Roots vacuum pumps are based on the proven Roots principle and were developed for applications that require high pumping speeds in the pressure range from 0.01 to 10 mbar. They are used as booster pumps in combination with a suitable backing pump and allow considerably shorter pump-down times.
The patented hydrokinetic drive permits operation at higher inlet pressures and automatically adapts the pump speed to the operating conditions. This prevents overloading and overheating and at the same time improves reliability, energy efficiency and service life.
The EH series is particularly suitable for demanding applications such as vacuum metallurgy, coating, vacuum packaging, freeze drying, vacuum distillation and steel degassing. With its robust design and low installation and maintenance effort, it offers a reliable solution for industrial vacuum systems.
With the EH series, Edwards offers a powerful range of Roots vacuum pumps developed specifically to increase pumping speed and to speed up the evacuation of vacuum systems. The contact-free rotors enable efficient, low-wear gas transport and make the pumps particularly suitable for demanding high and medium vacuum applications.
In combination with a suitable backing pump, the EH series can significantly increase the overall performance and evacuation speed of a vacuum system. The contact-free pumping mechanism supports clean and reliable operation.
The robust construction and the proven Roots principle ensure high operational reliability, a long service life and low maintenance requirements. The EH series thus offers a reliable solution for industrial and scientific vacuum systems with high demands on pumping speed and evacuation speed.
High pumping speed
The Edwards EH series offers high pumping capacities and was developed specifically as a booster for vacuum systems. In combination with a backing pump, the evacuation speed can be increased significantly.
For high and medium vacuum
Roots technology enables efficient vacuum generation in the high and medium vacuum ranges and is suitable for demanding industrial and scientific processes.
Contact-free rotor principle
The two rotors operate without direct contact with each other. This reduces mechanical wear in the pump chamber and supports reliable continuous operation.
Operating principle
The Edwards EH Roots pump series works on the proven principle of Roots vacuum technology. Two rotors rotating in opposite directions move without contact in the pump housing and convey the gas drawn in continuously from the inlet to the outlet. As a booster in conjunction with a suitable backing pump, the EH series increases the pumping speed and supports considerably faster evacuation of vacuum systems.
Thanks to the contact-free rotor principle, the pump chamber operates without direct mechanical contact between the rotors. This allows low-wear operation and supports reliable and clean gas transport – especially in demanding high and medium vacuum applications.
The robust design and the powerful Roots technology make the EH series a reliable and durable solution for industrial and scientific vacuum systems. Depending on the model, different pumping speeds are available, so that the pumps can be adapted to various system and process requirements.
The EH Roots pump series is suitable for applications that require high pumping speed, fast evacuation, reliable continuous operation and efficient generation of high and medium vacuum.
The technology page shows the operating principle with an interactive drawing: Roots vacuum pumps.
Standard operating conditions and performance
- Ambient temperature: 5 to 40 °C, depending on the model and version
- Achievable ultimate vacuum: down to approx. 0.001 mbar (absolute), in combination with a suitable backing pump
- Designed for high and medium vacuum applications
Frequently asked questions
Questions about the Edwards EH Roots pump series
Which models does the Edwards EH Roots pump series comprise?
Which pumping speeds does the series cover?
How does the technology of the series work?
Does Ehrler & Beck supply spare parts and service for the Edwards EH Roots pump series?
Which model fits your process?
Tell us the gas to be conveyed, the working pressure and the flow rate you need – we will advise you on selection, spare parts and service.







