A vent valve protects containers, pipeline systems or tanks from underpressure via targeted airing and therefore prevents damage such as deformation and contraction. The vent valve constantly synchronises the previously defined differential value between atmospheric pressure and internal pressure within the container with the current differential pressure. Should it fall below the set value, the vent opens and draws air into the tank, container or pipeline until the pressure fulfils the desired differential value. In order for your vent valves to function reliably, you must maintain them regularly and keep their vent openings free of dust and dirt at all times. Only then are they perfectly protected against underpressure damages.
vent-valve 1/2" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -100 to -800 mbar, adjustable made of stainless steel 1.4404
vent-valve 1/2" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -6 mbar made of stainless steel 1.4404
vent-valve 1" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -6 mbar made of stainless steel 1.4404
vent-valve 3/4" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -6 mbar made of stainless steel 1.4404
vent-valve 1" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -100 to -800 mbar, adjustable made of stainless steel 1.4404
vent-valve 3/4" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -6 mbar made of brass CW617N
vent-valve 3/4" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -100 to -800 mbar, adjustable made of stainless steel 1.4404
vent-valve 1" inch male screw threaded BSP-P for neutral gaseous media, steam set pressure -6 mbar made of brass CW617N
A vent valve only reacts to underpressure. In order to protect your pipelines, tanks and other containers against vacuum, we recommend the installation of a safety valve. When pressure gets too high, this gently discharges the excess and therefore prevents your pipelines, containers, silos, etc. from bursting.
Our product range includes four different vent valves: Type VB01 and Type VB02 are optimised for utilisation with neutral, gaseous media such as air, gases and technical vapours and are made from high-quality, non-corrosive stainless steel 1.4404. It is sealed with a PTFE carbon seal. Concerning the male thread, the vents have the three nominal sizes ½", ¾" and 1" (VB01 is additionally available in 2" inches). They are suitable for temperatures from a maximum low of -60°C to a maximum high of +225°C. Vent type VB01 is set at an opening pressure of -6mbar pressure difference. Type VB02, however, covers differential values between -100mbar and -800mbar. Types VB03 and VB04, on the other hand, are made from brass.
We are happy to support you with our expertise and experience in selecting the right vent valve for your pipeline system, tank or container. Just give us a ring or send an e-mail.
Special requests, spare parts or a quick support? Our staff will answer your questions and concerns immediately.
Mon. - Fri. from 08:30 - 17:00
Phone: +49 7143/9666-900
sales@nieruf.com
Commitment engenders trust. We stand by our word and are convinced that as a result not only our customers but also everyone we work with can rely on us.
We always strive to find the best solution for our customers. It is our goal and incentive to have completely satisfied customers.
Technical and commercial expertise form the basis for developing qualified solutions tailored precisely to the needs of our customers.
We do not adhere to rigid guidelines but instead focus on the individual wishes and needs of our customers. They are more important to us than internal company processes.
Contact For all questions we are available by phone
Mo - Fr 08:30 - 17:00
or send us an e-mail:
Resistance check 
Frequently asked questions 
Configurator 
Angle seat valves
Ball valves
Butterfly valves
Check valves
Coaxial valves
Compensators
DISCO check valves
Diaphragm valve
Flow control valve
Globe valves
Knife gate valve
Manometer gauge valve
Needle valves
Overflow valves
Pressure reducing valves
Safety valves
Sight glass
Solenoid valve
Stainless steel hoses
Strainer
Vent-valve
Need help?
If you have any questions, we are available by phone from Monday to Friday from 8:30 a.m. to 5:00 p.m.
order via mail:
