Shaft bottom with check valve 400/160

Product detailed description

The shaft bottom with check valve 400/160 is commonly used in residential and commercial buildings where underground sewage systems require regular access and protection from backflow. Installers typically integrate this component into the main drainage line to ensure unidirectional flow of effluent and prevent infiltration of waste from external sources. This unit is especially useful in systems where the risk of blockage or flooding is high, such as in long pipe runs or areas with frequent changes in flow direction. It allows for the insertion of cleaning tools like drain snakes without requiring entry into the chamber. The design is suitable for both new construction and retrofit applications.

For systems with extended pipe lengths, the placement of inspection chambers at regular intervals ensures accessibility and ease of maintenance. The unit is intended for use in gravity-fed sewer lines and is compatible with standard plastic or metal piping. The maximum allowable depth of installation is specified by the manufacturer, and the component is tested to handle operational temperatures up to 95°C. This makes it suitable for environments where thermal fluctuations are expected.

Technical parameters

Code	PR_23037
Brand	Karmat

The technical parameters define the suitability of this unit for specific drainage configurations. The maximum allowable installation depth ensures safe operation under static water pressure. The temperature resistance supports use in heated environments or where thermal expansion is a factor. These values are essential for determining correct placement and system compatibility during planning and design stages.

Installation and connection

To install the shaft bottom with check valve 400/160, align the unit with the existing pipe run and secure it using appropriate sealing methods. Check for proper alignment and ensure that the flange or threaded connections are fully engaged. Verify that the chamber is level and that the check valve is not obstructed during assembly. Common errors include incorrect sealing, which can lead to leakage, and misalignment that restricts flow. Always confirm that the chamber is accessible for future maintenance and that the check valve remains functional after installation.

Compatibility and accessories

This shaft bottom with check valve is designed for integration with standard sewer pipes and inspection chambers. It is typically used alongside cleaning tools and access covers to facilitate maintenance. For extended systems, additional inspection chambers may be required at intervals recommended by the manufacturer. Accessories such as sealing rings and support brackets should be selected according to the specific installation conditions and pipe material.

Technical background for designers

The operating principle of the shaft bottom with check valve relies on a flap mechanism that opens under forward flow and closes to prevent backflow. The materials used are resistant to corrosion and chemical exposure, ensuring long-term performance in aggressive environments. The integration into the system requires careful consideration of flow dynamics and potential pressure variations. The service life and efficiency depend on the quality of installation, the condition of the surrounding soil, and the frequency of blockages in the system.

Service and operation

Periodic visual inspections are recommended to ensure the check valve functions correctly and that no debris accumulates in the chamber. The flap can be accessed and removed from ground level without entering the chamber, simplifying maintenance. No scheduled service intervals are specified, but any signs of wear or malfunction should be addressed promptly to avoid system failure.

Frequently asked questions

Can the check valve be removed without opening the chamber?
Yes, the flap can be accessed and removed from the surface, eliminating the need for entry into the chamber during routine maintenance.

Is this unit suitable for use with chemical cleaning agents?
The materials are resistant to common chemicals used in sewer cleaning, provided these agents are within the manufacturer's specifications.

Can the chamber be installed in a location with frequent freezing conditions?
Yes, the unit is tested for resistance to low temperatures, making it suitable for use in cold climates as long as the installation follows local guidelines.

How is the check valve secured during normal operation?
The flap is held in place by its own weight and the pressure differential between the upstream and downstream sides of the chamber.