STRATE BEV-GF Two-stage valves

Area of use

Two-stage ventilation valve for release rates of 450 to 2000 m3/h in coarse and 20-40 m3/h in fine ventilation. For DN 80 and 100 housing material: EN-GJS-400-15, coating EKB; for DN 150 housing material S235 JR or P355 T1 and the coating consists of a wastewater-resistant Permacore thick micaceous iron ore coating 

DN 100 - 800 

PN 10 

Housing: EN-JL1040, 1.0116
Coating: TPE, EGD

Product features

  • First, air escapes during the first stage (coarse ventilation), until the medium closes off the first stage as it continues to flow.
  • Any remaining air then escapes more slowly through the second stage (fine ventilation), until it is also closed.
  • Gases collect, causing the fine ventilation to open once again until the medium closes this stage as well as it continues to flow.



About us

STRATE stands for innovative and state-of-the-art wastewater technology for more than 70 years. The company develops sewage pumping stations with the patented separator system, non-return valves as well as aeration and venting valves of all sizes. In the industrial sector STRATE supplies blower and compressor manufacturers with non-return valves and start-up relief valves for air and technical gases. STRATE Service offers a comprehensive range of services, from new installation and regular maintenance to refurbishment, spare parts sales and the reconstruction of existing stations.


STRATE Technologie für Abwasser GmbH
Im Kirchenfelde 9 
31157 Sarstedt

+49(0)5066 988-0