Pump stations provide constant primary water pressure in the pressure header corresponding to the programmed value.
TECHNOLOGICAL PROCESS DESCRIPTION
The most widely spread units in water preparation are ones with rotary pumps. The working principle of this pump is that the impulse wheel with blades is placed into a spiral case. When the motor rotates the wheel, liquid coming in the wheel center from the suction mud tank through the intake pipeline and the opened valve is thrown out through the blades by centrifugal force to the case periphery. As a result, there is depression in the center of the impulse wheel. Liquid is inflown in the pump. Then it is thrown out and further supplied in the pressure pipeline. Thus, a continuous flow is created in the system when the valve is opened. The rotary pump has balanced running.
Based on operation mode, pumps can be not only centrifugal but also piston-type. Piston pumps are used for dispensing water in high absorbing altitudes (up to 5-6m). Due to the in-and-out movement of the piston for these pumps and also for piston compressors, they are characterized with velocity fluctuation and pressure pulsation at the shaft (when absorbing liquid there is an idle motion, when compressing there is a working motion). That's why the work of the piston pumps is accompanied by uneven liquid flow in the pressure pipeline. Several working cylinders are used to smooth the pressure pulsation and enhance motion evenness in one pump. A flywheel is installed on the shaft.
Pump stations can work with different management schemes (using pressure relay or with regulated motor rotation speed). All pump stations are equipped with a protection system from the dry run.
- Easy assembly and maintenance
- Reliability and operational safety
- Automatic parameters regulation
- Small size