Variable frequency constant pressure water supply equipment for daily life

Selection criteria

           The basic basis for choosing an automatic water supply equipment is the designed water supply flow rate and water supply pressure (water head), and also needs to consider the type of flow variation for the purpose.

Continuous type: There are rarely times in a day when the flow is zero, or when the normal leakage of the pipeline network maintains a certain flow, such as in the pressurization system of large hotels, restaurants, industrial and mining enterprises.

          Intermittent type: Long periods of low water usage and low or zero flow, such as small office buildings, commercial and residential buildings, various residential buildings, and production water use

          At the same time, various factors such as changes in flow rate during a certain period of water supply, changes in flow rate in different seasons, and differences in water use in different regions should also be considered.

          Fire sprinkler water supply equipment should generally choose pneumatic water supply equipment, as it is in a system pressure maintaining state for a long time without any changes in flow rate. Pneumatic water supply equipment can cope with general pipe leaks and add a small flow auxiliary pump, so there is no need to start the main pump normally, saving energy.

          The advantages of variable frequency water supply equipment are that it can supply water at a constant pressure and the constant pressure value can be adjusted within a certain range. The constant pressure accuracy is generally less than 0.02 MPa. Variable frequency speed regulation is an efficient and energy-saving method, with an average energy saving of 20% compared to typical pneumatic water supply equipment. In addition, the impact current of variable frequency start-up is small, and the pump's impact is also small, resulting in low noise during low-speed operation.

         The advantages of pneumatic water supply equipment include relatively low cost, simple control system technology, convenient service, and easy maintenance.

Selection Guide
1、 Selection of pumps for variable frequency constant pressure water supply equipment