Within a pipeline system under pressure, different volume flow rates are a common problem. They can harm or even destroy the system. Mostly, the cause lies in the late or non-existing control over the media, for example a pump, which causes the pressure. As a result, the pump continues to build up pressure even when the pressure is already too high. This results in damage to the pump, or even in an explosion that destroys the entire system and might harm people and can cause tremendous amount of loss. Overflow valves from NieRuf industrial valves are the solution to this problem.
angle-type overflow valve 1/2" inch fm type UV02 made of gunmetal/brass pressure range 2,0 - 12,0 bar seal PTFE for liquid and gaseous media
angle-type overflow valve 3/8" inch fm type UV02 made of gunmetal/brass pressure range 2,0 - 12,0 bar seal PTFE for liquid and gaseous media
angle-type overflow valve 1/2" inch fm type UV01 made of gunmetal/brass pressure range 2,0 - 12,0 bar seal FKM for liquid and gaseous media
overflow valve 3/8" inch female type UV16 made of stainless steel 316 L/CF8M pressure range 2,0 - 12,0 bar seal PTFE for liquid and gaseous media
overflow valve 3/4" inch female type UV16 made of stainless steel 316 L/CF8M pressure range 2,0 - 12,0 bar seal PTFE for liquid and gaseous media
overflow valve 1/2" inch female type UV16 made of stainless steel 316 L/CF8M pressure range 0,5 - 2,5 bar seal NBR for liquid and gaseous media
overflow valve 3/8" inch female type UV16 made of stainless steel 316 L/CF8M pressure range 2,0 - 12,0 bar seal EPDM for liquid and gaseous media
straightway form overflow valve 3/4" inch male type UV05 made of gunmetal/brass pressure range 1,5 - 6,0 bar seal EPDM for liquid and gaseous media
In order to protect a system or container, overflow valves (also called bypass valves or control valves) can be used. Once the pressure is too high, the valve activates a bypass, which reduces the pressure within the system. The media now flows through the open overflow valve, and the bypass leads it back into the flow of the pump, thereby creating a separate loop. The media continues to flow through the bypass valve, until the pressure within the system is reduced and causes the overflow valve to close again.
Here at NieRuf, you will find the control valve that suits your needs. Our overflow valves can be delivered adjusted and sealed to a specific pressure, or adjustable. It is possible to adjust the valve while the system is running without any leakage. We provide overflow valves in the following nominal sizes: 3/8“, ½“, 3/4“, 1“, 1 ¼“, 1 ½“, und 2“. They come with thread connections or flange connections in the nominal sizes DN15, DN20, DN25, DN32, DN40, DN50, DN65 or DN80. Depending on the media, the overflow valves come with EPDM, FKM / Viton or PTFE seals in order to assure a maximum of tightness. Their pressure range varies from 0,2 – 70,0 bar. Whether you need stainless steel or gunmetal overflow valves or bypass valves, NieRuf is your expert. Inquire for specific relief valves, and we will be happy to help.
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 7143/9666-901
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
Gate valves
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:
