HOW CAN I CHOOSE THE CORRECT PLUNGER PUMP?
HOW CAN I CHOOSE THE CORRECT PLUNGER PUMP?
The first aspect to take into consideration concerns the power available. The piston pumps offered by are characterized by high efficiency and within the range offered you can find pumps that can be operated by small single-phase electric motors, up to pumps that offer very high performance in terms of flow rate and pressure, but which obviously require , in order to work, great powers.
Beyond the power it is also important to evaluate the type of engine available and its rotation speed so as to allow the pump to work at a speed between 60% and 100% of that indicated in the catalog. offers different types of flanges for each pump model, so as to allow the customer to adapt the pump to different types of motors. Reducers and multipliers complete the range of available couplings.
PRESSURE AND FLOW RATE
Once the available power has been established it is important to focus on the use you want to make of the water supplied by the piston pump. There are systems mainly designed to supply large quantities of water at relatively low pressures. Fire-fighting, street washing, sewer cleaning, spraying: these are just some of the application contexts in which large quantities are normally required. In other situations it is preferable instead to use high pressures (the piston pumps offered by can reach 1250 bar) with relatively limited water flows. Hydro-sandblasting, rust and paint removal, hydro-demolition and more generally any work situation that requires a great impact force to act effectively on the surface to be treated: in these contexts piston pumps are normally used able to reach pressures over 500 bar. The application possibilities mentioned above represent extreme situations that mark the application limits of the piston pumps offered by . The absorbed power is calculated by relating these two parameters, flow rate and pressure, so it is important to know how to find the correct compromise to meet your needs and reach your goals.
WORKING TEMPERATURE
In some situations, to increase the effectiveness of pressurized water considerably, in terms of cleaning power, it is necessary to supply hot water. In many plants the boiler is mounted downstream of the pump, but this is not always possible. When the heating unit is installed upstream of the pump, it is clear that the latter must be designed to withstand certain temperatures. The special gaskets mounted on the HT pumps offered by allow you to work continuously with temperatures up to 85 °. It is therefore essential to take into consideration the parameter relating to the maximum working temperature allowed if there is a need to pass heated water through the piston pump.
FREQUENCY OF USE
There are systems designed to work continuously and others that require an intermittent use of the piston pump. In this regard it is good to take into account the rotation speed. It is clear that a pump that at the same performance works at a lower rpm than another can be the right choice if intensive use is envisaged.
CONSTRUCTION MATERIALS
Brass is by far the most used material for the construction of the piston pump heads offered by . In some contexts, however, it is highly advisable to use pumps that mount Aisi 316 stainless steel heads. Salt water, demineralised water or particularly aggressive chemical agents can in fact cause serious problems for brass pumps, considerably reducing their useful life.
