Circulator pump Termojet MEGA 100-120F 450 (DN100)

Termojet MEGA 100-120F 450 circulating pump — a large industrial circulating pump with a permanent magnet (PM) motor and built-in frequency converter for district heating networks, large boiler rooms, and heating systems of industrial facilities. Flanged connection DN100, installation length 450 mm, energy efficiency class A (EEI ≤ 0,20), maximum head 12 m, flow rate up to 66 m³/h, working pressure PN6/PN10.

Technical Specifications

AUTO Operating Modes

Constant differential pressure (Δp-c). The pump maintains the set pressure differential between the supply and return regardless of the current load of the large system. Δp-c mode is the industrial standard for district heating networks and boiler rooms: stable hydraulics even with sharp fluctuations in consumption (morning and evening heat demand peaks).

Proportional differential pressure (Δp-v). The differential pressure decreases proportionally to the flow rate as the load decreases. Δp-v mode is most efficient for systems with a daily and seasonal heat consumption schedule: at night or on weekends, the pump significantly reduces speed and consumption. The third mode — constant speed — is available for special process tasks.

Applications

• District heating networks: pumping station for distributing heat-transfer fluid between buildings or plant sections.
• Large boiler room: primary circuit pump from boilers to heat input nodes.
• Industrial cooling systems with flow rates from 40 m³/h.
• Industrial process heating and liquid cooling systems.
• Termojet Mega series — catalogue: full range of industrial pumps.
• Termojet pump groups — catalogue.
• Industrial heat pump systems: Termojet heat pumps.

Why a PM Motor with Variable Frequency Drive is More Efficient

An unregulated industrial DN100 pump consumes a fixed power around the clock — regardless of the actual heat consumption of the system at any given moment. The PM motor of MEGA 100-120F starts from 31 W and reaches 1523 W only at peak 66 m³/h. In a typical daily district heating schedule, the system operates most of the time at 30–60% of peak load — and the PM pump consumes proportionally less. Class A (EEI ≤ 0,20) is confirmed by the specification. The LCD display shows operating parameters in real time. Dry-run protection prevents damage in case of emergency pressure drop.

MEGA 100-120F and Heat Pump Systems

An industrial heat pump or HP cascade for a large facility requires a pump with a flow rate of 50–66 m³/h on the primary circuit. MEGA 100-120F covers this range with a margin and in Δp-v mode automatically adapts to the variable heat flux of the HP throughout the day. More information on comprehensive industrial solutions — tjheatpump.com.ua.

Frequently Asked Questions

Is a separate frequency converter required?
No. MEGA 100-120F has a built-in frequency converter (PM motor with integrated inverter) — no external VFD is required. Operating modes are switched directly from the pump control panel.

What power supply is required for MEGA 100-120F?
Single-phase: 1×230 V, 50/60 Hz. Despite its industrial class, the pump does not require a three-phase supply — this is a significant advantage when installing in boiler rooms without three-phase power.