FEKA FXV 20.07 T-NA submersible sludge pump DAB.FEKA FXV

Product detailed description

This submersible sludge pump is specifically designed for use in commercial and industrial environments where the transport of wastewater containing fibres, paper or textile materials is required. It is commonly installed in septic tanks, lift stations, or waste water collection chambers. The pump is suitable for both fixed installations with lifting devices and portable setups where the unit is directly placed at the tank bottom. Its robust design ensures reliable operation in challenging conditions with high levels of suspended solids.

Installers typically encounter this model in commercial buildings such as hotels, restaurants, or factories where large volumes of contaminated water need to be handled efficiently. The pump integrates seamlessly into existing drainage systems and can be configured for either continuous or intermittent operation depending on the application requirements. Due to its compact size and dual connection options (flanged and threaded), it offers flexibility during installation.

Technical parameters

The technical parameters define the performance envelope and suitability for specific applications. For instance, the maximum dry run time of 10 minutes indicates the pump’s tolerance to accidental dry conditions but also highlights the importance of proper liquid level monitoring. The flow rate of up to 59.7 m³/h and a head of 18.5 m make it appropriate for medium-scale pumping tasks. The ability to pass solid particles up to 50 or 65 mm, depending on the model, is essential for handling untreated or minimally treated sewage water without clogging.

Installation and connection

Installation should be carried out in accordance with the manufacturer’s guidelines to ensure optimal performance and longevity. Begin by positioning the pump at the lowest point of the tank, ensuring it rests securely on the base. Connect using either flanged or threaded fittings, which are available in 2”, DN 50 or DN 65 sizes. Confirm that the pump is fully submerged before powering it up. When using a lifting device, verify that the coupling mechanism allows smooth vertical movement for inspection and servicing.

A critical step is checking the integrity of the cable gland and mechanical seals to prevent leakage. Ensure that the discharge pipe is properly supported and aligned to avoid strain on the pump housing. Common installation errors include incorrect sealing, insufficient submersion depth, or improper alignment of the inlet/outlet. These issues can lead to reduced efficiency or premature component failure.

Compatibility and accessories

This pump is compatible with standard sewage systems and can be integrated with control panels featuring float switches for automatic operation. The single-phase versions include an internal capacitor, while three-phase variants require external protective devices. Accessories such as lifting ropes, guide rails, or junction boxes may be necessary depending on the installation type. No alternative products are listed for comparison purposes.

Technical background for designers

The FEKA FXV 20.07 T-NA operates on a vortex impeller principle, which allows free passage of solids without the risk of clogging. This is particularly beneficial in systems where the wastewater contains long fibres or coarse particles. The impeller is made from durable materials and is driven by a motor with insulation class F, ensuring stable operation even under elevated temperatures. The pump housing is constructed with corrosion-resistant components, and the stainless steel shaft (AISI 304) contributes to extended service life.

The IP68 rating confirms complete protection against dust and immersion in water, making it suitable for submerged operation in various environments. The double mechanical seal, made from silicon carbide and housed in an oil chamber isolated from the pumped liquid, enhances reliability and reduces maintenance needs. Designers should consider the thermal limitations of the version intended for explosive atmospheres, which has a maximum operating temperature of +40 °C.

Service and operation

Regular inspection and cleaning of the pump inlet and outlet are recommended to prevent blockages caused by debris accumulation. Check the condition of the mechanical seals and cable glands periodically, especially after prolonged use. No specific service intervals are provided in the documentation, but early signs of wear such as unusual noise or reduced flow should prompt immediate investigation.

Frequently asked questions

Can the pump be operated in fixed installations with lifting devices?
Yes, the FEKA FXV 20.07 T-NA supports fixed installations equipped with lifting mechanisms, allowing for easy access during maintenance or inspection.

Is the pump suitable for use in explosive environments?
Yes, an ATEX-certified version is available for hazardous areas, complying with the Ex db IIB T4 Gb classification.

What materials are used for the impeller and shaft?
The impeller is designed for vortex flow, and the motor shaft is made from stainless steel AISI 304, offering resistance to corrosion and mechanical stress.

Does the pump support automatic operation with a float switch?
Single-phase versions come with an internal capacitor and can operate with a float switch for automatic on/off control, suitable for capacities up to 1.5 kW.