Whether industrial pumps need cooling and which parts need cooling

Update:15-06-2019
Summary:

Whether the industrial water pump needs cooling water, […]

Whether the industrial water pump needs cooling water, which parts need cooling, and the cooling water consumption is different. This is related to the medium temperature, industrial water pump type, etc. The basic considerations are given below. The specific working conditions and industrial parameters of the industrial water pump should be used in the specific application. The pump factory experience is determined.
When the temperature of the conveying medium is higher than l20 °C, it is generally considered whether the bearing housing needs to be cooled. The cooling water piping system adopts the scheme A and the scheme K in Table 1-39.
When the temperature of the conveying medium is higher than l20 °C, it is generally preferred to cool the sealing liquid (or buffer) (to eliminate the metal bellows seal) to reduce the temperature of the sealing chamber, improve the working conditions of the sealing, and prolong the service life. The cooling water piping system uses the scheme K and the scheme M in Table 1-39.
When conveying the easily crystallizable liquid, it should consider cooling the (Quench) sealed chamber for the external sealing liquid (such as water, steam, etc.) and preventing solids from accumulating on the atmospheric side; conveying liquid with high saturated vapor pressure (such as liquefied gas, In the case of liquid ammonia, etc., it is considered to provide an external supply liquid (such as 40 ° C hot water, steam, etc.) to the mechanical seal to prevent liquefied gas or liquid ammonia from freezing due to vaporization of the pressure drop, and to prevent it. The auxiliary seal ring becomes hard and brittle and loses its sealing effect. The cooling water piping system uses the scheme D in Table 1-39.
Magnetically driven pumps generally do not require cooling water.
The cooling water consumption should be based on the value given by the pump factory. The following empirical values can be used for estimation.
Cooling water consumption is small pump o ~ 1.5m3 / h, large pump 0 ~ 3ms / h. For pumps with a pressure lubrication system, take large values. For air-cooled motors, the cooling water consumption is large, requiring l0~50m3/h. The motor is usually air-cooled, and the air-cooled motor is considered only when the power is large (for example, greater than 2000kw) and the site has a suitable water source.
For industrial water pump steam turbines, the cooling water is mainly used for oil coolers, steam seal condensers and the like. The condensing steam turbine also needs to increase the cooling water for the surface condenser to cool the gas discharged from the steam turbine into water.

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