How to selection of heat pump? _

heat pump is a pump body, pump cover, inner and outer rotor, pump shaft, shaft end seal and other components. Main transmission for a set of mutually meshing rotor, shaft end seal use high temperature resistant return flow combination seal, use water tank type cooling way to control the temperature of the shaft sealing system. Many customers asked how should heat pump type selection, the following small compiled several heat pump type selection of parameter and matters needing attention.

1, the traffic is one of the important performance data of selected oil pump, it is directly related to the entire plant production capacity and transmission capacity. Such as design process design can calculate a normal, minimum, maximum three flow water pump. Choosing pump, based on maximum flow, normal flow, give attention to two or morethings when there is no maximum flow, usually desirable to normal flow rate of 1. 1 times as the maximum flow.

2, the temperature of the oil pump, choose a maximum of operating fluid temperature requirements, for example, the temperature of the maximum requirement is 350, but the actual maximum operating temperature of the pump is 320, that will cause the oil or pump broken cannot run directly, so be sure to choose a suitable or greater than the maximum operating fluid temperature of pump.

3, the head unit system is another important performance data of pump, general with 5% - Head to selection after 10% allowance.

4, device and system piping layout condition refers to send liquid height conveying liquid from liquid to, such as absorption side the lowest level, such as the highest level of discharge side length, some data and piping specifications and materials, pipe specification, quantity, etc. , comb for department head and NPSH checking calculation.

5, fluid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, physical properties with temperature density d, c u viscosity, solid particle diameter and gas content in the medium and so on, this is related to the system of the head, effective computing cavitation allowance and appropriate water pump type: chemical properties, mainly refers to the chemical corrosion resistance and toxicity of liquid medium, is to choose what kind of shaft seal material selection and heat conduction oil pump type of important basis.

6 a lot of content, operating conditions, such as the operation of the liquid saturated steam force T p, suction side pressure PS ( Absolute) , discharge side pressure container PZ, altitude, the environment temperature is clearance or continuous operation, the position of the oil pump is fixed or movable.