Flanged Horizontal Check Valve - Series 06 Stainless Steel - Without Spring - DN 65; L=18.5mm BRA.06.623

Product detailed description

Flanged check valves are essential components in industrial and commercial fluid systems, ensuring unidirectional flow and preventing backflow. This model is commonly used in HVAC systems, water distribution, compressed air systems, and for transporting oils and hydrocarbons. Installers and system designers must consider the valve's operating temperature range, material compatibility, and connection type to ensure proper integration into the system.

When installed between flanges, this valve provides reliable sealing and flow control. It is particularly suited for environments where corrosion resistance is required, such as in chemical or industrial applications. The absence of a spring mechanism reduces complexity and potential points of failure, making it suitable for applications where low maintenance is a priority.

Technical parameters

The nominal diameter (DN 65) determines the size of the pipe system it can integrate into, while the nominal pressure (PN 6) defines the maximum pressure the valve can withstand under normal operating conditions. The material (stainless steel) ensures resistance to corrosion and is suitable for a wide range of fluids. These parameters are critical for correct sizing and selection to match the system requirements.

Installation and connection

Installation of this flanged check valve should be carried out between two flanges according to STN EN 1092-1 standards. The valve must be aligned horizontally, and the flange surfaces must be clean and free of debris to ensure a proper seal. The connection size is DN 65, and the flanges must be compatible with PN 6, PN 10, or PN 16 ratings. During installation, it is important to verify that the flange bolts are tightened evenly to avoid misalignment or leakage. A common mistake is improper tightening of bolts, which can lead to flange distortion and compromised sealing.

Compatibility and accessories

This valve is compatible with systems operating within the temperature range of -20°C to +200°C. It is suitable for use with water containing up to 50% glycol but is not recommended for steam applications. No additional accessories are required for standard installation. However, installers should ensure that the flanges and gaskets used are compatible with the valve's specifications.

Technical background for designers

The valve operates by allowing fluid to flow in one direction and closing automatically when reverse flow is detected. The stainless steel body (AISI 351 CF8M) provides high resistance to corrosion and mechanical stress. The disc is also made from the same material, ensuring long-term durability. The absence of a spring reduces the risk of mechanical failure and ensures consistent performance in a wide range of operating conditions. The valve's efficiency is influenced by the quality of the flange connection and the integrity of the sealing surfaces.

Service and operation

Regular inspection of the flange connection and sealing surfaces is recommended to ensure continued performance. The minimum backpressure required for the valve to close properly is 0.3 bar. If the system experiences frequent pressure fluctuations, additional checks should be performed to ensure the valve remains functional. No specific service intervals are provided in the technical data, but visual inspections and functional tests should be carried out during routine maintenance.

Frequently asked questions

Can this valve be used in steam systems?
No, this valve is not suitable for steam applications. The technical data explicitly states that it is not recommended for steam.

What is the maximum operating temperature?
The valve is rated for operation up to +200°C. Beyond this temperature, performance and material integrity may be compromised.

Is this valve suitable for glycol-based fluids?
Yes, the valve is compatible with water containing up to 50% glycol. This makes it suitable for certain heating and cooling applications.

What is the minimum backpressure required for sealing?
A minimum backpressure of 0.3 bar is required for the valve to seal properly. This ensures that the disc closes effectively when reverse flow is detected.