Check valve 5/4 inch with flap, PN16 ZZK4

Check valve – protection of installations and devices

Check valve with a 5/4 inch flap, designed to protect water installations and central heating systems against backflow. Its flap-based design provides effective blockage of medium return, protecting pumps, boilers, tanks and meters. Made of high-quality materials, it guarantees reliable operation and long service life.

Construction and application

This valve is a simple yet effective solution for installers and end-users. Installation is intuitive, and its versatility allows it to be used in various types of installations. The valve has a tapered internal thread (NPT), which facilitates its connection to existing system components. The valve flap made of durable material, combined with an NBR seal, ensures tightness and minimizes the risk of leaks. The maximum operating temperature is 100°C, and the maximum working pressure is 16 bar – these parameters allow for safe use in standard operating conditions.

Key features and benefits

• Effective protection: Prevents backflow of medium, protecting sensitive installation elements from damage.
• Durability: Made of brass and equipped with an NBR seal, which ensures corrosion resistance and long-term use.
• Wide application: Ideal for water installations and central heating systems in residential and commercial buildings.
• Easy installation: Tapered internal thread (NPT) facilitates quick and trouble-free connection to the existing installation.
• Safety: Ensures proper operation of the heating or water system by preventing unwanted backflows.
• Precision of execution: Guarantees reliable operation and minimizes the risk of failure – as befits Ferro products.

This valve is particularly recommended when installing circulation pumps, domestic hot water tanks and manifolds, where protection against backflow is crucial for the proper functioning of the system. Thanks to its solid construction and reliability, it is an investment for years to come.