dual plate check valve DN50 seal EPDM PN 10/16/25/40 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN50
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN100 seal FKM (Viton) PN 10/16 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN100
design:
dual plate check valve
seal:
FKM (Viton)
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN65 seal EPDM PN 10/16/25/40 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN65
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN125 seal EPDM PN 10/16 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN125
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN50 seal NBR ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
diameter:
DN50
design:
dual plate check valve
seal:
NBR
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN80 seal EPDM PN 10/16/25/40 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN80
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN300 ASME B16.5 / ANSI 150, body made of stainless steel 1.4408, wings made of stainless steel 1.4408 seal EPDM
diameter:
DN300
design:
dual plate check valve
seal:
EPDM
body material:
stainless steel 1.4408
pressure range:
0 - 20 bar
dual plate check valve DN65 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
diameter:
DN65
design:
dual plate check valve
seal:
NBR
body material:
stainless steel 1.4408
pressure range:
0 - 16 bar
dual plate check valve DN450 seal FKM ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
diameter:
DN450
design:
dual plate check valve
seal:
FKM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN600 ASME B16.5 / ANSI 150 seal FKM, body made of GGG40 epoxyd plated blue 180µm, wings made of stainless steel 1.4408
diameter:
DN600
design:
dual plate check valve
seal:
FKM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN350 seal FKM ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of GGG40
diameter:
DN350
design:
dual plate check valve
seal:
FKM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN50 ASME B16.5 / ANSI 150, body made of stainless steel 1.4408, wings made of stainless steel 1.4408 seal EPDM
diameter:
DN50
design:
dual plate check valve
seal:
EPDM
body material:
stainless steel 1.4408
pressure range:
0 - 20 bar
dual plate check valve DN400 seal NBR PN 10 DIN EN 1092-1 Form B, body made of stainless steel 1.4408, wings made of stainless steel 1.4408
diameter:
DN400
design:
dual plate check valve
seal:
NBR
body material:
stainless steel 1.4408
pressure range:
0 - 10 bar
dual plate check valve DN50 seal EPDM PN 10/16/25/40 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
diameter:
DN50
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN300 seal EPDM PN 10 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm
diameter:
DN300
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 10 bar
dual plate check valve DN50 seal NBR PN 10/16/25/40 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm
diameter:
DN50
design:
dual plate check valve
seal:
NBR
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN200 seal EPDM PN 10/16 DIN EN 1092-1 Form B, body made of grey cast iron wings made of stainless steel
diameter:
DN200
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 16 bar
dual plate check valve DN65 ASME B16.5 / ANSI 150 seal EPDM, body made of GGG40 epoxyd plated blue 180µm, wings made of stainless steel 1.4408
diameter:
DN65
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN300 seal EPDM PN 10 DIN EN 1092-1 Form B, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
diameter:
DN300
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 10 bar
dual plate check valve DN50 ASME B16.5 / ANSI 150, body made of stainless steel 1.4408, wings made of stainless steel 1.4408 seal metal
diameter:
DN50
design:
dual plate check valve
seal:
metal
body material:
stainless steel 1.4408
pressure range:
0 - 20 bar
dual plate check valve DN350 seal EPDM ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of GGG40
diameter:
DN350
design:
dual plate check valve
seal:
EPDM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN400 ASME B16.5 / ANSI 150 seal FKM, body made of GGG40 epoxyd plated blue 180µm, wings made of stainless steel 1.4408
diameter:
DN400
design:
dual plate check valve
seal:
FKM
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
dual plate check valve DN65 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
diameter:
DN65
design:
dual plate check valve
seal:
FKM (Viton)
body material:
stainless steel 1.4408
pressure range:
0 - 16 bar
dual plate check valve DN100 seal NBR ASME B16.5 / ANSI 150, body made of GGG40 epoxyd plated blue 180µm, wings made of Alu-Bronze
diameter:
DN100
design:
dual plate check valve
seal:
NBR
body material:
GGG40 epoxyd plated blue 180µm
pressure range:
0 - 20 bar
Dual-plate-check-valve: the ultimate backflow protection
The dual-plate-check-valves from NieRuf can be made from one of two materials: The high quality model is made of stainless steel and can be used with oil, fuel oil and demineralized water, which comes in handy in areas of chemical industry or plant engineering. The cheaper model is made of GGG40 and can be used with less demanding liquid and gaseous media. It is often used in building technology as well as water- and sewage technology. They come in nominal sized from DN50 to DN600, which means they can be used exclusively in larger pipelines. The seal, depending on the medium, can be made of NBR, FKM, EPDM, Viton, metal or FPM. The FKM seal is most often used with oil, while the metal seal can withstand steam very well. All plates come with a return spring. The check valves can be mounted in any installation position, but keep the flow direction of the medium in mind. It should flow from bottom to top. The opening pressure of the valve can be found in the data sheets. Individual pressure and leakage tests are possible for each dual-plate-check-valve. The mounting and final inspection can only be done by trained staff. We would love to manufacture your individual twin-plate-check-valve, feel free to contact us.
There for you
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
Quality
Our certified quality management according to DIN EN ISO 9001: 2015 is part of our DNA. With our test stands we can carry out pressure tests with up to 350 bar with air and water as well as leak tests according to DIN EN 122661.
This is NieRuf
Committed
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.
Motivated
We always strive to find the best solution for our customers. It is our goal and incentive to have completely satisfied customers.
Competently
Technical and commercial expertise form the basis for developing qualified solutions tailored precisely to the needs of our customers.
Flexible
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 
Resistance check 
Frequently asked questions 
Configurator 