Pedrollo 6SR12 / 21-PD submersible apple

When record-breaking head and flow rate are required for water supply from deep wells, the Pedrollo 6SR12/21-PD submersible pump becomes the optimal choice. This powerful multi-stage centrifugal electric pump is designed for continuous submerged operation, ensuring exceptional efficiency and unparalleled reliability. It is ideally suited for large industrial facilities, extensive agricultural irrigation systems, and fire safety systems with the highest demands for the volume and pressure of pumped water.

Operating Principle and Design Features:

The pumps of the 6SR12 series, which include the Pedrollo 6SR12/21-PD, operate on the principle of multi-stage centrifugal pumps. Liquid sequentially passes through a series of impellers and guide vane diffusers. Each impeller, rotating on a single drive shaft inside its diffuser, increases the liquid's pressure, directing it to the next stage. The summation of pressure differentials at each stage allows for impressive head and flow rate performance at the outlet of the discharge port. The motor connects to the pump via a bracket whose parameters comply with strict NEMA standards, guaranteeing a strong, reliable, and sealed connection capable of withstanding high operational loads.

Operating and Installation Conditions:

The Pedrollo 6SR12/21-PD pump is designed for installation in wells with a minimum diameter of 6 inches (152 mm) and specializes in pumping clean water with a minimal sand content (no more than 100 g/m³). This feature makes it indispensable where the purity of the pumped medium is critically important. For safe and efficient operation, the electric pump must be lowered into the well via the discharge pipeline to a depth where it is fully submerged. It is important that, even during operation, when a drop in the liquid level in the well is observed, the pump remains fully submerged (minimum 50 cm from the upper water level). Furthermore, to prevent the intake of bottom sediments, the distance to the bottom of the well must be at least 1 meter. As a mandatory precaution and for reliable fixation of the pump in the well, it is highly recommended to use a strong stainless steel or nylon rope, secured through the specially provided holes in the discharge casing.

The Pedrollo 6SR12/21-PD is a high-tech, powerful, and unbeatably reliable piece of equipment, created to ensure uninterrupted and efficient water supply for the most large-scale and demanding projects.