Inline pump with variable frequency drive Termojet TBE 50-36/2 (5.5 kW)

Inline pump Termojet TBE 50-36/2 — a vertical inline "backpack"-type pump with a removable motor block and built-in variable frequency drive for industrial constant-pressure water supply and heating systems. Connection DN50, flange PN16, power 5.5 kW, supply 380 V / 50 Hz, maximum head 42 m, maximum flow rate 40 m³/h, operating point 30 m³/h at 36 m head. Inlet and outlet on the same axis (inline) — minimum installation space in the pipeline.

Technical Specifications

Operating Modes and Built-in Automation

Constant pressure (automatic mode). The built-in variable frequency drive automatically maintains the set pressure in the system regardless of current water draw. As consumption increases the pump smoothly increases its speed; as it decreases — it reduces speed. No water hammer: speed changes are smooth, without sharp pressure spikes.

Removable motor block. The removable-block design allows motor maintenance without removing the pump from the pipeline — convenient for industrial systems where downtime is undesirable.

Why an Inline Design with VFD Is Advantageous

A conventional pump without a variable frequency drive maintains pressure through valves and throttling — excess energy is wasted. The built-in VFD in the TBE 50-36/2 regulates speed and consumes exactly as much as needed to maintain the set pressure. The inline arrangement (inlet and outlet on the same axis) significantly simplifies installation compared to horizontal end-suction pumps — no separate support frame is required, less installation space needed.

Applications

• Industrial constant-pressure systems for cold and hot water supply.
• Large boiler rooms and heating systems with flow rates up to 40 m³/h and heads up to 42 m.
• Fire suppression and process systems with clean non-aggressive water.
• See the Termojet Mega series and Termojet pump groups.

TBE 50-36/2 and Heat Pump Systems

For large industrial systems with a heat pump where the HP serves multiple large zones and high flow at significant head is required, the TBE 50-36/2 provides the necessary hydraulic parameters. The built-in VFD allows smooth flow regulation without mechanical throttling. Learn more about heat pumps and large systems on the Termojet heat pumps page.

Advantages:

• power 5.5 kW, head up to 42 m, flow rate up to 40 m³/h;
• built-in variable frequency drive — constant pressure and energy savings;
• inline construction — minimum installation space;
• removable motor block — maintenance without dismounting from the pipeline;
• temperature up to 120°C, pressure up to 16 bar.

Frequently Asked Questions

What power supply is required for the TBE 50-36/2?
Three-phase 380 V / 50 Hz supply. The pump cannot be connected to a single-phase 220 V network. Before installation, verify that three-phase power is available at the site.

Can the TBE 50-36/2 be installed horizontally?
The pump is a vertical inline design (rotor axis vertical). Inlet and outlet are on the same horizontal pipeline axis. Installation is into a horizontal pipeline; the motor is positioned vertically on top. Before installation, clarify the configuration with a Termojet manager.