Inline pump with variable frequency drive Termojet TBE 50-24/2 (3 kW)

Inline pump Termojet TBE 50-24/2 — a vertical inline "backpack"-type pump with a removable motor block and built-in variable frequency drive for constant-pressure water supply systems and industrial pipeline systems. Connection DN50, flange PN16, power 3 kW, supply 380 V / 50 Hz, maximum head 28 m, maximum flow rate 35 m³/h, medium temperature 0°C to +120°C, maximum pressure 16 bar.

Technical Specifications

Operating Modes

Constant pressure (built-in variable frequency drive). The pump maintains the set pressure in the system regardless of current water draw or flow rate. The variable frequency drive smoothly regulates motor speed: as water consumption increases the pump speeds up, as it decreases — it slows down. Stable pressure throughout the system with no water hammer or pressure surges.

"Inline" construction — the pump inlet and outlet are on the same pipeline axis. Installation directly into the main line without elbows or adapters. The removable motor block allows servicing or replacing the motor without dismounting the pump casing from the pipeline.

Applications

• Constant-pressure cold water supply systems in multi-apartment buildings or commercial facilities.
• Industrial pipeline systems: supply of clean technical fluid without solid particles.
• Process applications requiring stable fluid supply at pressures up to 16 bar.
• Recirculation and heat-carrier supply systems at temperatures up to +120°C.
• Termojet Mega series — catalogue: full range of industrial pumps.
• Termojet pump groups — catalogue.
• Heat pump systems requiring pressure boosting: Termojet heat pumps.

Why a Built-in Variable Frequency Drive Is More Efficient

A pump without variable-speed control maintains pressure only by mechanical throttling — part of the power is wasted suppressing excess head. The built-in VFD of the TBE 50-24/2 solves this differently: the motor rotates exactly as fast as needed to maintain the set pressure at the current flow rate. Energy savings across a daily water-draw profile are significant. Smooth start and stop eliminate water hammer — the service life of pipeline fittings increases. The removable motor block simplifies maintenance without shutting down the entire system.

TBE 50-24/2 and Heat Pump Systems

For industrial facilities where a heat pump is integrated into a water supply or process cooling system, the TBE 50-24/2 can serve as the primary circuit or supply circuit pump. Its high resistance to temperatures up to +120°C makes the pump suitable for heat pump systems in heat-extraction mode. Learn more: Termojet heat pumps.

Frequently Asked Questions

Can the TBE 50-24/2 be connected to a single-phase 220 V supply?
No. The TBE 50-24/2 requires a three-phase 380 V / 50 Hz supply. For single-phase connection, refer to the Termojet pump range with 230 V power supply.

What is the "removable block" construction and how does it simplify maintenance?
The motor block is bolted to the pump casing and can be removed without dismounting the casing from the pipeline. To replace the motor or carry out servicing, simply disconnect the power supply and unscrew the fasteners — the system remains installed in the pipeline.