Shaft for drilled well 1300x1000

Product detailed description

Drilled well shafts are essential components in water supply systems where submersible pumps are installed in bored wells. These enclosures provide a secure and accessible housing for pump control systems, pressure vessels, and piping. They are typically used in residential and commercial water supply systems, especially in areas where groundwater is accessed via deep drilling. The shaft must be sized to accommodate all necessary components and allow for maintenance access. This model is suited for installations where space constraints and ease of access are important factors.

Installers working in civil engineering, plumbing, or irrigation systems often use such enclosures to house the mechanical and electrical components of a water supply system. The shaft is placed below ground level to protect the equipment from environmental exposure and to maintain a clean working area. It is commonly used in domestic water supply systems, including setups with submersible pumps, pressure tanks, and filtration units. The enclosure is not part of the pump or pressure tank assembly but serves as a housing for these components.

Technical parameters

Installation and connection

Installation begins with preparing a suitable pit below ground level, ensuring the shaft is level and aligned with the borehole. The shaft is then placed in the pit and secured in position. A transition pipe connects the shaft to the borehole, with standard sizes such as 1 inch commonly used. Electrical cables pass through a dedicated cable gland, while the borehole connection is made via a transition fitting. It is important to ensure all connections are watertight and that the lid is properly sealed to prevent ingress of water or debris.

Common mistakes during installation include incorrect alignment of the shaft with the borehole, insufficient sealing of cable and pipe penetrations, and failure to provide adequate access for maintenance. The lid should not be subjected to regular foot traffic or vehicle loads. A protective cover or fence is recommended to prevent accidental damage or unauthorized access.

Compatibility and accessories

This shaft is compatible with a wide range of submersible pumps and pressure vessels. It is typically used in conjunction with a pressure tank, pressure switch, check valve, and connecting fittings. Additional components such as filters, ball valves, and frequency converters may also be installed inside the enclosure. These items are not included with the shaft and must be ordered separately. Installers should ensure that the selected pressure tank fits within the available space and that all electrical and hydraulic connections are compatible with the shaft's design.

Technical background for designers

The shaft is constructed from polypropylene, a thermoplastic known for its resistance to corrosion and chemical exposure. This material is ideal for underground use in a variety of soil conditions. The design allows for easy access to internal components, facilitating maintenance and inspection. The shaft is self-supporting and does not require additional concrete reinforcement, except in areas with high groundwater levels. The internal dimensions must be considered when planning the layout of components to ensure proper airflow and prevent overheating of electrical equipment.

The operating principle involves housing the pump control system and pressure vessel in a protected environment. The shaft acts as a barrier against moisture and physical damage while allowing for the necessary connections to the borehole and electrical supply. The integration into the overall system depends on the size and type of pressure vessel used, as well as the required flow rate and pressure settings. Proper ventilation and drainage are important to maintain the efficiency and longevity of the system.

Service and operation

Regular inspection of the shaft is recommended to ensure all connections remain watertight and that the internal components are functioning correctly. The lid should be checked for signs of wear or damage, and any necessary repairs should be carried out promptly. The internal space should be kept clean and free from debris to prevent blockages or damage to sensitive equipment. No specific service intervals are provided, but routine checks are advised to maintain system performance.

Frequently asked questions

Can this shaft be used with a pressure tank of 8L capacity?
Yes, the internal dimensions of the shaft accommodate a pressure tank with a capacity of 8L. Ensure the tank is positioned correctly to allow for proper airflow and access to control components.

Is it necessary to reinforce the shaft with concrete during installation?
Concrete reinforcement is not required in most cases. However, if the site has a high water table, additional support may be necessary to prevent shifting or damage to the shaft.

Can the shaft be used with a frequency converter?
Yes, the shaft can house a frequency converter. Ensure there is sufficient space for the device and that all electrical connections are properly insulated and protected from moisture.

What is the maximum borehole diameter supported by this shaft?
The shaft supports borehole diameters up to DN 200. A transition fitting is used to connect the shaft to the borehole, ensuring a secure and watertight seal.