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

Product detailed description

Submersible sludge pumps are essential components in wastewater management systems, particularly in commercial and industrial settings where the fluid contains fibrous, solid or abrasive materials. These pumps are commonly installed in septic tanks, lift stations and sumps where continuous or intermittent removal of sludge and semi-solid waste is required. Installers working in construction, maintenance or service roles often encounter these units in municipal infrastructure, food processing plants or large office complexes. The design must accommodate variable fluid levels and ensure reliable operation in environments where clogging is a frequent issue.

The IVAR FEKA FXV 20.07 M-NA is engineered for such demanding conditions. It is suited for both fixed installations using lifting devices and portable setups where the pump is directly placed at the tank bottom. The pump’s compact dimensions and dual connection options (flanged and threaded) make it adaptable to different system layouts and retrofitting scenarios. Its dry-run protection and vortex impeller allow for efficient handling of mixed-phase flows without mechanical blockage risks.

Technical parameters

Maximum dry-run time	10 min
Operating range	flow rate up to 59.7 m³/h and head up to 18.5 m
Passability	solid particles up to 50 mm or 65 mm depending on model
Connection type	flanged and threaded: 2”, DN 50, DN 65
Fluid temperature range	up to +50 °C (+60 °C for short periods), +40 °C for ATEX version
Protection class	IP 68
Motor insulation class	F
Impeller type	Vortex
Code	60191208
Brand	IVAR

These parameters define the pump’s operational envelope and are critical for system integration. The maximum dry-run time of 10 minutes prevents motor overheating in case of low liquid levels. The flow rate of 59.7 m³/h and head of 18.5 m determine the pump’s suitability for high-capacity applications. The passage size of up to 50 or 65 mm ensures compatibility with fluids containing coarse solids, depending on the selected model. The temperature range up to +50 °C allows operation in moderately heated environments, while the ATEX version supports use in explosive atmospheres.

Installation and connection

Installation begins with verifying the tank or sump dimensions to ensure sufficient submersion depth and clearance for maintenance access. The pump connects via flanged or threaded fittings (2”, DN 50, DN 65), which must be aligned with the existing piping system. A lifting device or chain should be attached to the pump body for easy removal during inspection or servicing. The cable entry is sealed with resin, and the motor shaft is made of AISI 304 stainless steel to resist corrosion. Before commissioning, check the motor insulation class F and the IP68 rating for water ingress protection. A common mistake is neglecting to secure the cable properly, which could lead to mechanical stress and failure over time.

Compatibility and accessories

The pump is compatible with standard wastewater systems and can be integrated with level controls for automatic operation. A plunger is available for versions with power up to 1,5 kW. For three-phase models, external protection is the user’s responsibility. Accessories such as extended cables or custom voltage configurations are available upon request. While no alternative products are listed, the pump’s modular design allows for easy replacement of wear-prone parts like the mechanical seal or impeller.

Technical background for designers

The FEKA FXV 20.07 M-NA operates using a vortex impeller, which creates a swirling motion to move solid-laden fluids without direct contact between the impeller and the material. This minimises clogging and reduces wear. The motor is insulated to class F, ensuring thermal stability under prolonged load. The stainless steel shaft and resin-sealed cable entry enhance durability in corrosive environments. The double mechanical seal, made of silicon carbide, is housed in an oil chamber that isolates it from the pumped medium, extending service life. System designers should consider the pump’s dry-run limit and temperature tolerance when planning for fluctuating flow conditions or hot environments.

Service and operation

Regular checks include inspecting the mechanical seal for leaks and verifying the integrity of the cable entry. The pump’s compact design facilitates quick access to internal components for routine maintenance. No specific service intervals are provided, but visual inspections after prolonged use are recommended. Ensure the pump remains fully submerged during operation and avoid running it with insufficient fluid, as this exceeds the 10-minute dry-run limit. Lubrication requirements are minimal due to the sealed bearing design. If the pump shows signs of reduced performance, disassemble and clean the impeller and inlet to remove accumulated debris.

Frequently asked questions

Can the FEKA FXV 20.07 M-NA handle fibrous materials?
Yes, it is designed for wastewater containing fibres, paper or textile materials typically found in domestic or commercial settings.

What is the maximum particle size the pump can pass?
The pump can pass solid particles up to 50 mm or 65 mm depending on the model configuration.

Is the pump suitable for installation in an explosive atmosphere?
An ATEX version is available for use in explosive environments, certified under II2G Ex db IIB T4 GB standards.

What connection types are available for the pump?
The pump offers both flanged and threaded connections in sizes 2”, DN 50 and DN 65, providing flexibility for different system designs.