General Description; Construction Features; Applications - EBARA MMD Series Instruction Manual

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CHAPTER 1

GENERAL DESCRIPTION

1.1

Construction Features

MMD-MMD4 pumps are centrifugal horizontal pumps coupled by
means of a spindle to a three-phase totally enclosed
asynchronous motor with external ventilation for motor cooling.
Pump casing is provided with fastening feet for pumps with
motor up to size 132; for bigger motor sizes B3/B5, the pump
is without feet.
Sealing in ensured by a mechanical shaft seal.
Typical performances refer to continuous duty with clear water
(specific weight: 1,000 kg/m3) with a manometric suction head
of 2 meters if not otherwise specified.
For higher heads, please contact Ebara Pumps Europe to check for
the pump best suited to the service.
Pump nameplate reports the following data:
- Manufacturer
- Pump type
- Serial number
- Delivery (litres per minute)
1.2

Applications

MMD-MMD4 pumps are mainly employed in the following
applications:
- Heating and air conditioning systems.
- Water lifting from lakes, rivers, wells, etc.
- Irrigation system on ground surface or by sprinkling.
- Water supply for small communities or isolated houses.
- Pressure systems.
MMD-MMD4 pumps should always operate within the following
operating limits:
- Max operating pressure: 10 bar.
- Max liquid temperature: +130˚C
- Min liquid temperature: - 10˚C
- Max ambient temperature: +40˚C
- Max liquid viscosity: 5˚E
- Max n˚ of startups/hour: 20 (at regular intervals)
ATTENTION: Condensate may develop inside the motor.
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- Head (meters)
- Month/year of construction
- Break power (in kW)
- Rounds per minute (min-1)
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