Double-entry pumps type D are widely used as feed pumps for circulation, recirculation, for heating systems - network pumps for boiler houses, irrigation, as pumps for firefighting, in agriculture - as a water pump for field irrigation, at housing services enterprises, in special version they are used even in oil and chemical industry. Feature of the pump is a centrifugal wheel of bilateral entry, that is, the liquid enters the impeller from both sides, then it is dispersed and ejected by the vanes inside the wheel and enters the pressure chamber of the pump. D pump has 360 degree angle of liquid flow acceleration unlike the conventional centrifugal pump, this increases the efficiency and makes the unit energy saving. The discharge tubes are linearly positioned, which also saves the energy that a conventional centrifugal pump uses to change the angle of fluid flow. Often, one pump D can replace several centrifugal pumps, which will reduce labor costs and repair costs of equipment, as it is known that the main condition of stable and long-term operation of centrifugal pumps is absence of vibration (exact fit and alignment). The mirror design of the pump makes it possible to control this process, which also increases the stability of alignment by many times.
Centrifugal double-entry pumps type D and the units based on them are designed for transportation of industrial water and other liquids with viscosity and chemical activity similar to water, with temperature up to 85°C, without solid particles over 0,05% by mass, with size over 0,2 mm and micro-hardness over 6,5 GPa (650 kgf/mm2).
Pumps, on their own or as a part of units, can be supplied to customers in the following designs
with impeller providing nominal parameters;
with turned impeller diameter.
Unit designation of pump and pump-based unit D 320-50,
where:
D - pump type;
320 - nominal flow, m3 /h;
50 - pump head in nominal mode, m.
Pump D320-50a - also with turning "a" of wheel diameter, where:
a - first turning of impeller diameter;
Pump D320-50b - also with turning "b" of impeller diameter, where
b - second turning of impeller diameter.
