A non-return valve, often referred to as a check valve, is an indispensable element in many industrial systems. It is installed directly between two flanges in a pipe and efficiently controls the liquid flow. Flow is only possible in one direction, while backflow is reliably prevented. This protects the system from damage caused by pressure surges or contamination.
High-quality non-return valves for every application
Our non-return valves are available in a variety of designs, including models with wafer, threaded or flanged connections. We offer a wide range of materials such as stainless steel, galvanised st...
A non-return valve, often referred to as a check valve, is an indispensable element in many industrial systems. It is installed directly between two flanges in a pipe and efficiently controls the liquid flow. Flow is only possible in one direction, while backflow is reliably prevented. This protects the system from damage caused by pressure surges or contamination.
High-quality non-return valves for every application
Our non-return valves are available in a variety of designs, including models with wafer, threaded or flanged connections. We offer a wide range of materials such as stainless steel, galvanised steel, grey cast iron, ductile iron and brass to meet your individual requirements. Our range includes sizes from DN8 to DN600. The right seal is crucial for the optimum function and longevity of a non-return valve. We therefore offer a wide range of seals made from materials such as metal, NBR, EPDM, FPM-VITON and PTFE. The choice of the right seal depends on factors such as temperature, medium and the specific requirements of your application. Our experienced engineers will be happy to advise you on the selection of the optimum seal for your project.
Choosing the Right Seal for Check Valves: NBR, EPDM, FPM, PTFE & Metal Seals for Every Industry
Our check valves are designed for use in a wide range of industrial applications. Given the varying requirements across different industries, choosing the right seal is crucial to ensuring optimal performance and longevity of the check valves.
- NBR seals (nitrile rubber) are ideal for applications involving oils, greases and fuels. They offer excellent resistance to mineral oils and are suitable for temperatures ranging from -30°C to +100°C. They are therefore particularly useful in the automotive and mechanical engineering industries.
- EPDM seals (ethylene propylene diene rubber) offer excellent resistance to weathering, ozone and many chemicals. They are ideal for use in the water and wastewater industry as well as in the food and beverage industry. With a temperature range from -40°C to +120°C, EPDM seals are extremely versatile.
- FPM-VITON seals (fluorocarbon rubber) are characterised by their high resistance to high temperatures and aggressive chemicals. They are particularly suitable for use in the chemical industry and in high-temperature applications, as they can withstand temperatures from -20°C to +200°C.
- PTFE seals (polytetrafluoroethylene) offer excellent chemical resistance and are ideal for use in corrosive environments. They are resistant to almost all chemicals and have a temperature range of -200°C to +260°C. This makes them particularly suitable for use in the chemical and pharmaceutical industries.
- Metal seals are used when extremely high temperatures or pressures prevail. They offer excellent resistance and tightness in critical applications, such as in the petrochemical industry and in power plants.
Zertifikate
Maßgeschneiderte
Beständigkeitscheck
A non-return valve is a valve that allows liquids or gases to flow in one direction and prevents them from flowing back in the opposite direction. It is often used in pipework systems to prevent backflow and possible contamination.
Choosing the right sealing material for your swing check valve depends on several factors, including the type of liquid or gas, temperature and pressure conditions, chemical resistance and environmental factors such as UV radiation and ozone exposure. A specialist or the manufacturer can help you select the appropriate sealing material based on your specific requirements.
Yes, check valve or non-return valves can be used in both liquid and gas systems. However, it is important to ensure that the valve is suitable for the specific requirements of the gas system.
FPM (fluororubber, also known as Viton) is a favoured sealing material for demanding applications in non-return valves due to its high resistance to aggressive chemicals, high temperatures and various oils and fuels. It is frequently used in chemical and petrochemical plants, in the food and beverage industry and in the pharmaceutical industry.
Non-return valves are manufactured from various materials, including stainless steel, galvanised steel, brass and plastic. The choice of material depends on the application and the requirements for corrosion resistance and durability.
EPDM (ethylene propylene diene rubber) is a popular sealing material for non-return valves due to its excellent resistance to UV radiation, ozone and various chemicals. It is particularly suitable for applications in the field of water supply, heating and cooling systems as well as for sanitary installations.
NBR (nitrile butadiene rubber) is often used as a sealing material in non-return valves due to its resistance to oils, greases and various chemicals. It is ideal for applications in industrial plants, oil and gas pipelines and hydraulic systems.
Choosing the right sealing material for your swing check valve depends on several factors, including the type of liquid or gas, temperature and pressure conditions, chemical resistance and environmental factors such as UV radiation and ozone exposure. A specialist or the manufacturer can help you select the appropriate sealing material based on your specific requirements.
These valves are often used in water and sewage systems, heating, ventilation and air conditioning (HVAC) systems, and in industrial processes where it is important to prevent the backflow of media.
The two plate open in the direction of flow due to the pressure of the flowing medium. In the event of backflow or pressure drop, they collapse and close the passage to prevent backflow.
A double plate check valve is a check valve with two semi-circular flaps that open to allow flow and close to prevent backflow. It offers low pressure loss and a fast closing response.