check valves are usually used in pipeline systems (e.g. drains) in order to prevent a backflow of the medium. The swing check valve only allows the medium to flow in one direction. Should the pressure within the system exceed the valves resistance, the swing check opens in flow direction and allows for the medium to flow through. Once the pressure goes back to below the valve resistance, or even changes the flow direction of the medium, the swing check valve closes and seals reliably. In contrast to ball valves or butterfly valves, the closing of the valve happens automatically, regulated only through the pressure and flow of the medium.
dual plate check valve DN50 seal NBR PN 10/16/25/40 DIN EN 1092-1 Form B, body made of stainless steel 1.4408, wings made of stainless steel 1.4408
dual plate check valve DN150 seal EPDM PN 10/16 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm
swing check valve DN250 ASME B16.5 / ANSI 150 made of stainless steel A351 CF8M seal metall for liquid and gaseous media
swing check valve with spring DN200 PN 10/16 DIN EN 1092-1 Form B plastic PVDF seal NBR for liquid and gaseous media
swing check valve with spring DN40 PN 10/16 DIN EN 1092-1 Form B plastic PVDF seal PTFE for liquid and gaseous media
swing check valve with spring DN300 PN 10 DIN EN 1092-1 Form B made of steel 1.0460 / A 105, zinc plated seal NBR
swing check valve DN300 PN 10 DIN EN 1092-1 Form B plastic PP-H seal NBR for liquid and gaseous media
swing check valve with spring DN32 PN 10/16 DIN EN 1092-1 Form B plastic PVDF seal EPDM for liquid and gaseous media
swing check valve DN200 PN 10/16 DIN EN 1092-1 Form B Alu bronze 2.0975 / C958 seal FKM for liquid and gaseous media
check valve DN200 PN 10/16 DIN EN 1092-1 Form B made of stainless steel A351 CF8M seal EPDM
swing check valve DN400 PN 10 DIN EN 1092-1 Form B made of stainless steel A351 CF8M seal NBR for liquid and gaseous media
dual plate check valve DN50 seal FKM (Viton) PN 10/16/25/40 DIN EN 1092-1 Form B, body made of stainless steel 1.4408, wings made of stainless steel 1.4408
dual plate check valve DN500 seal EPDM PN 10 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
swing check valve DN125 ASME B16.5 / ANSI 150 made of stainless steel A351 CF8M seal NBR for liquid and gaseous media
swing check valve with spring DN50 PN 10/16 DIN EN 1092-1 Form B plastic PVDF seal PTFE for liquid and gaseous media
swing check valve DN50 ASME B16.5 / ANSI 150 made of steel 1.0460 / A 105, zinc plated seal FKM for liquid and gaseous media
dual plate check valve DN65 seal EPDM ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
swing check valve with spring DN32 ASME B16.5 / ANSI 150 made of steel 1.0460 / A 105, zinc plated seal FKM for liquid and gaseous media
dual plate check valve DN250 seal EPDM PN 10/16 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm
swing check valve with spring DN50 PN 10/16 DIN EN 1092-1 Form B plastic PP-H seal PTFE for liquid and gaseous media
swing check valve with spring DN40 PN 10/16/25/40 DIN EN 1092-1 Form B made of steel 1.0460 / A 105, zinc plated seal EPDM
swing check valve with spring DN80 PN 10/16/25/40 DIN EN 1092-1 Form B Alu bronze 2.0975 / C958 seal PTFE for liquid and gaseous media
dual plate check valve DN80 seal EPDM ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of GGG40
swing check valve DN100 PN 10/16 DIN EN 1092-1 Form B plastic PVC-U seal FKM (Viton) for liquid and gaseous media
Challenging applications ask for a variety of different check valves. Depending on the mounting position, installation place, temperature and medium, different check valves should be used. Depending on the medium, which flows through the system, the temperature and the installation place, the material of the swing check valves needs to be chosen. NieRuf offers check valves made of stainless steel, steel, PVC-U, PP; cast iron and GGG40. They come with FPDM, PTFF, NBR and FKM seals, in diameter DN15, DN20 and even up to DN500 or DN600.
No matter what your challenge regarding check valves looks like, our team at NieRuf Industriearmaturen will take it on! Together with you, we will find the right solution. With demanding or aggressive media, we suggest check valves made of stainless steel. Frequently used backflow preventers are check valves and dual plate check valves. The swing check valves can be set up with an additional spring to facilitate closing. With high pressure ranges and high flow rates (which means high KV/KVS), dual plate check valves should be used, for they have a significantly low loss of flow. If you need specific connections to you pipeline, the DISCO- check valve can be used. We would love to help you find the right swing check valve from our extensive product range.
Special requests, spare parts or a quick support? Our staff will answer your questions and concerns immediately.
You can reach us from Monday to Friday at +497143 9666900 and any time at 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
Coaxial valves
Compensators
DISCO check valves
Flow control valve
Globe valves
Knife gate valve
Manometer gauge valve
Needle valves
Overflow valves
Pressure reducing valves
Safety valves
Sight glass
Solenoid valve
Strainer
check valves
diaphragm valve
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:
