china manufacture circulating pump
china manufacture circulating pump
china manufacture circulating pump

Mega 25-12 automatic circulator pumps

Technical data

Power supply voltage

220-240V 50/60Hz, PE

Motor protection

No external protection required

IP class

IP44

Insulation class

H

Humidity(RH)

Max. 95%

System pressure

1.0 MPa

Compliance

CE/ GS/ EMC/ LVD/RoHS/REACH

Environment temperature

0+40

Temperature class

TF110

Liquid temperature

-30+110℃ (Glycol up to 50%)

Voltage/ Frequency

230V/50HZ

Pump housing

Cast iron/Stainless steel

Energy(EEI)

≤0.23-Part2

  • Item NO.:

    Mega 25-12

1. Boiler circuit pump

2. Primary circuit pump

3. Pump in one- and two-pipe heating systems

4. Heating circuit pump in a domestic hot water circulation

5. Heat pump in air heating systems

6. Pump for underfloor heating systems

7. Heat regeneration and recovery systems

8. Condenser and dry cooler circuit pump

9. Consumer circuit pump (fan coils)

10. Pump of cold supply systems in central air conditioners

 

MEGA automatic circulator pumps is the ideal choice for almost any building project – old or new. With its unrivalled energy efficiency, all-encompassing range and built-in communication capabilities.

MEGA is ideal for engineers and specifiers looking to create high-performance heating and cooling systems.

The pump is maintenance-free due to the canned-rotor type design. This also means that pump and motor form an integral unit without shaft seal and with only two gaskets for sealing. The bearings are lubricated by the pumped liquid. MEGA features PWM and 0-10V external control. 

Construction

MEGA pumps are wet rotor pumps, i.e. the pump and the motor are a single-piece unit without shaft end seal. The bearings are lubricated with pumped liquid.

The pumps feature:

• controller built in a control unit;

• operating panel at the front of the pump;

• external protection of the motor is not required.

Motor and frequency converter

MEGA pumps are equipped with permanent-magnet motor. This motor type is characterized by an increased efficiency in comparison with traditionally used asynchronous squirrel-cage motors. Motor speed is set up by a built-in frequency converter.

Pump connections

Threaded pipe and flange connections.

Surface finish quality

A pump housing and its head part have cataphoretic coating for better corrosion resistance.

Cataphoretic coating application includes the following steps:

• alkali cleaning;

• zinc phosphate pre-treatment;

• cathodic electrodeposition (cataphoresis);

• varnish-and-paint film drying at 200–250 °C.

Easy installation and operation

Equipped with Self Adapting Mode(Auto Mode, Factory Setting), pump runs once the power is connected and adapts its performance according to actual system needs.

Control is effected by digital pulse-width modulation (PWM) low-voltage signal, enabling pump to be used to meet different flow requirement in various systems.

Low noise and high comfort

Noise index: ≤42dB(A)

Low energy consumption

A class energy efficiency, Power consumption lowest to 6W

Multiple protection

With over-voltage and over-current protection

Eco-Design Benchmark

EEI≤0.23-Part 2

Quick release power plug

Start-up and stop the pump quickly.

 

Central heating circulating pump

Product photo and 4 control modes

Press button to switch between different control modes and increase or decrease the setting with the buttons on left and right side.

 

Setting

Explanation

Auto

Running with in Defined Range

BL

Propotional pressure curve

HD

Constant pressure curve

HS

Constant Speed curve

Operating conditions

General instructions

Water in heating systems

Water quality according to local standards

Water with glycol

Maximum viscosity = 10–50 cSt ~ solution of water 50 % / glycol 50 % at -10 °C

Operation range

Parameter

MEGA

Maximum flow, Q

10 m³/h

Maximum head, H

10 meters

Maximum operating pressure

PN 10: 10 bar / 1.0 MPa.

Minimum inlet pressure

In order to avoid cavitation noise and bearings damage during pump operation, the following minimum relative pressure should be maintained at its inlet port.

Inlet pressure

Liquid temperature

Inlet pressure of the pump

≤ + 85 °C

0.005 MPa

≤ + 90 °C

0.028 MPa

≤ +110 °C

0.100 MPa

Pumped liquids

The pump is designed to pump pure and nonaggressive liquids without solids or fibers that can have a mechanical or chemical impact on the pump.

Water used in heating systems should meet the quality requirements of system water for heating units.

The pumps must not be used for inflammable or explosive liquids such as diesel fuel or petrol.

The pumps must not be used for aggressive liquids such as acids or sea water. If the pump is not operated during a cold season, take the necessary measures to avoid low temperature damages.

Using additives in a heat transfer medium with the density and/or kinetic viscosity higher than the water ones decreases the performance of the pump.

Never use the additives that can negatively affect the pump operation. In order to learn whether the pump can be used with a certain liquid, take into account several factors.

The most important are lime content, pH, temperature, and the content of solvents and oils.

The pump can be used for glycol and water mixtures at the level up to 50 %. See section «General instructions». Pumping of glycol mixtures decreases hydraulic properties of the pump.

Installation Drawing

Mega 25-12

 

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