Check Valves

Discover high-quality non-return valves, swing check valves, ball check valves made of stainless steel, steel, ductile iron, grey cast iron and more at Fergo Armaturen.

Our products offer reliable solutions for controlling fluid flows in various industrial applications. Whether stainless steel for increased corrosion resistance or steel for robust operating conditions, our non-return valves ensure high quality and durability. Optimise your processes with precise control and protection against unwanted backflow. Find out more about our large selection and find the right non-return valve for your requirements at Fergo Armaturen.

Gestra non-return valves and foot valves

Gestra is a renowned manufacturer of fittings and also offers a wide range of non-return valves. Foot valves are a special type of non-return valve that are often used in fittings such as taps or instantaneous water heaters.

Applications for non-return valves and swing check valves

Check valves and non-return valves are important components in various systems to prevent the backflow of liquids or gases. They are often used in industries such as water supply, where they prevent the backflow of water and thus avoid the contamination of drinking water systems. In pump systems, they protect pumps from damage caused by backflow. In HVAC systems (heating, ventilation and air conditioning systems), they ensure that refrigerants only flow in one direction and that the efficiency of the system is maintained. In irrigation systems, they prevent contaminated water from flowing back into clean water supplies. In the oil and gas industry, they ensure that hazardous substances flow safely and in one direction. Check valves are also used in wastewater systems to prevent contaminated water from flowing back into clean systems and in ventilation systems to ensure proper airflow. In shipping, chemical plants, fire protection systems and hydraulic networks, these valves play a crucial role in the safety, efficiency and integrity of systems by ensuring the flow of liquids or gases in one direction only.

Check valves - their sealing applications

Various sealing materials are used in check valves, including EPDM, NBR, Viton and PTFE, depending on the specific requirements of the application:

EPDM (ethylene propylene diene rubber): EPDM seals are known for their good resistance to water, steam, ozone and UV radiation. They are well suited for applications where good weather and water resistance is required, such as in water supply and HVAC systems.

NBR (nitrile butadiene rubber): NBR gaskets are characterised by excellent resistance to oils, fuels and many chemicals. They are ideal for applications in the oil and gas industry as well as in automotive and aviation technology, where media containing oil must be sealed.

Viton FPM/FKM: Viton seals offer excellent resistance to high temperatures, chemicals and solvents, including aggressive chemicals such as acids and alkalis. They are often used in chemical processes, in the petrochemical industry and in food processing.

PTFE (polytetrafluoroethylene): PTFE gaskets have exceptional chemical resistance to almost all media and are resistant to high temperatures. They are used in critical applications where excellent sealing performance and chemical resistance are required, such as in the chemical, pharmaceutical and food processing industries.

Each of these sealing materials offers specific properties that can be selected according to the requirements of the application to ensure effective sealing and long-term reliability in check valves.

FAQ on non-return valves

What are non-return valves and what function do they fulfil?

Non-return valves are fittings that allow the flow of a medium in one direction and prevent it in the opposite direction. They therefore ensure the unimpeded flow of liquids or gases in pipework systems.

What are the advantages of non-return valves?

Non-return valves provide protection against backflow and support safety and efficiency in pipework systems. They help to prevent damage caused by reverse fluid flow and enable reliable control of the medium.

What types of non-return valves are there?

There are various types of non-return valves, including

Double blade check valve
Wafer check valve
Threaded check valves
Disco check valve
Ball check valve
Foot valve
Axial check valve

Where are non-return valves used?

Check valves are used in various industries and systems, including water treatment, sanitary engineering, HVAC systems, oil and gas pipelines and manufacturing processes.

What factors need to be considered when selecting a non-return valve?

Factors to consider include the fluid type, flow rate, pressure conditions, temperature range, material compatibility, installation orientation and maintenance requirements.

What are the main applications of non-return valves?

Check valves are often used to protect pumps and other devices in pipe systems by preventing backflow. They are also used in safety and control systems.

What norms and standards apply to non-return valves?

Various industry norms and standards such as DIN, ANSI, ISO and local regulations may be relevant for the manufacture and installation of check valves. It is important to find out about the specific requirements of your region or industry.

Check Valves

Gestra non-return valves and foot valves

Applications for non-return valves and swing check valves

Sub-Categories:

Non-Return Valves Ball Check Valves Disco Check Valves Axial Check Valves

Foot Valves Flanged Check Valves Double Check Valves Gestra Check Valves

Product Configurator

Check valves - their sealing applications

FAQ on non-return valves