Flanged check valve - series 05 - DN 65; L=120mm BRA.F5.000

Product detailed description

Flanged check valves are essential components in closed-loop systems where unidirectional flow must be maintained. This model is commonly used in commercial and industrial buildings, including HVAC systems, water heating circuits, and compressed air or oil transfer lines. Installers and technicians working in these environments will find this valve suitable for applications requiring reliable flow control and minimal maintenance. The valve is designed to prevent backflow in systems where pressure fluctuations or pump shutdowns could cause reverse flow.

Correct sizing and selection of check valves are critical for system efficiency and longevity. This valve is designed for nominal diameter DN 65 and must be integrated into systems with compatible flange dimensions and pressure ratings. The PN 16 flange rating ensures compatibility with standard piping systems operating within the specified pressure range. The operating temperature range of -10°C to +100°C makes it suitable for a wide range of environments, including those with glycol-based fluids.

Technical parameters

Installation and connection

Installation of this flanged check valve requires alignment with the system’s flange dimensions and bolt pattern. The valve must be mounted in a position that allows free flow in the intended direction and ensures that the flange bolts can be tightened evenly. The flange PN 16 rating corresponds to EN 1092-1 standards, so compatibility with the system’s piping is essential. Common installation errors include incorrect orientation, which can lead to improper sealing or premature wear. The valve can be installed in any position, but the direction of flow must be clearly marked and followed.

Before tightening the flange bolts, ensure that the sealing surfaces are clean and free from debris. The NBR sealing material is compatible with water, glycol mixtures, and hydrocarbons but may degrade in the presence of aggressive solvents or high temperatures. Always verify the system’s operating conditions against the valve’s specifications before installation.

Compatibility and accessories

This valve is compatible with standard HVAC and water supply systems using PN 16 flanges. It is suitable for use with glycol-based fluids up to 50% concentration and can be integrated into systems with cast iron or steel piping. No additional accessories are required for basic installation, but flange gaskets or bolt kits may be necessary depending on the system’s existing components. No related products are specified for this model.

Technical background for designers

The operating principle of this check valve relies on the pressure differential between the upstream and downstream sides. When the upstream pressure exceeds the downstream pressure by at least 0.1 bar, the disc opens to allow flow. If the pressure drops below this threshold, the disc closes to prevent backflow. The cast iron body provides structural integrity and resistance to mechanical stress, while the brass guide and disc ensure smooth operation and minimal wear. The NBR sealing material is chosen for its flexibility and resistance to common fluids used in HVAC and water systems.

The valve is designed for integration into closed-loop systems where flow reversal could damage equipment or reduce efficiency. The operating temperature range of -10°C to +100°C ensures compatibility with both heating and cooling applications. The PN 16 flange rating allows for secure connection in systems with standard piping. The valve is not suitable for steam applications due to the limitations of the sealing material and body construction.

Service and operation

Regular inspection of the valve is recommended to ensure continued performance. Check for signs of wear on the sealing surfaces, corrosion on the body, or misalignment of the flange bolts. If the valve fails to close properly or exhibits excessive leakage, it may require cleaning or replacement of the sealing components. No specific service intervals are provided in the technical data, but maintenance should be performed as part of routine system checks. The valve is not designed for frequent manual operation and should be left to function automatically in response to system pressure changes.

Frequently asked questions

Can this valve be used with glycol mixtures?
Yes, the valve is suitable for use with water containing up to 50% glycol. The NBR sealing material is compatible with this type of fluid.

Is the valve suitable for steam applications?
No, the valve is not recommended for use with steam. The sealing material and body construction are not designed to withstand the operating conditions of steam systems.

Can the valve be installed in any orientation?
Yes, the valve can be mounted in any position. However, the direction of flow must be clearly marked and followed to ensure proper operation.

What is the minimum back pressure required for the valve to function?
The valve requires a minimum back pressure of 0.1 bar to ensure proper closure and prevent reverse flow.