working principle
MZD pumps are submersible drainage pumps,designed for automatic operation. Their operating principle is that of open centrifugal pump. The impeller, mounted on the drive shaft, of a rear disk and blades,which are enclosed by the pump body cover. Fluid enters the rotating blade channel via the suction strainer,which forms the support base for the pump. Here the fluid moves radially from the centre outwards,acquiring energy both in the form of pressure and increased speed. When it leaves the impeller the fluid is conveyed towards the volute. Here part of the kinetic energy is transformed into pressure energy and the fluid leaves the pump via the side opening machined in the pump body.

pump installation and applications
MZD pumps are designed to lift clear or slightly dirty water which is not chemically aggressive to the pump components.These pumps are particularly suited in domestic applications for draining in basements and garages in country homes and for emptying tanks. MZD pumps are simple to install and reliable for automatic use in fixed installations.
A purposely built pit with minimum dimensions 450x450x450 mm is recommended for fixed installations,to provide total drainage and allow correct operation of the float switch. This system automatically starts the pump when the fluid reaches a preset level,stopping it once the fluid has been emptied. Installing a suitable non retum valve on the delivery pipe prevents reverse flow when the pump stops.

performance
MZD pumps have the following features:
※ curves expressly designed for particular applications, with high delivery rates in relation to modest installed power levels.

structural characteristics
※ cast-iron pump body with UNI 338 11/2 gas threaded delivery opening.
※ stainless steel motor sleeve.
※ stainless steel suction strainer providing the support base for the pump.
※ general electric Noryl gfn2v technopolymer open vortex impeller.
※ stainless steel motor shaft.
※ carbon/alumina mechaical seal.
※ sealed induction motor in oil bath designed for continuous duty. The thermal cutout relay (motor protector)is incorporated.Insuation class B.
※ protection IP 68.
※ neoprene "H07 RN-F" submerged supply cable.supplied standard with 5 metres of cable and plug (10metres onrequest)
※ construction and safety standards in compliance with EN 60 335-1(IEC 335-1, CEI61-50), IEC34.