Author:Site Editor Publish Time: 2020-09-21 Origin:Site
A mechanical water pump seals is a shaft sealing device for rotating machinery, such as centrifugal pumps, centrifuges, reactors, and compressors. Since the driveshaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment, and the medium in the equipment leaks outward through the gap. If the pressure in the equipment is lower than the atmospheric pressure, the air leaks into the equipment, so there must be a shaft seal to prevent leakage. There are many types of shaft seals. Because mechanical pump seals have the advantages of less leakage and long life, and mechanical pump seals are the most important shaft seal method for this equipment in the world. A mechanical seal is also called an end face seal. It is defined in relevant national standards as follows: "At least a pair of end faces perpendicular to the axis of rotation are kept close together under the cooperation of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the auxiliary seal. A device that prevents fluid leakage by relative sliding."
Working conditions of mechanical pump seals
1. The suction pressure of the mechanical seal of the pump is ≤1.0MPa or the maximum working pressure of the pump system is ≤1.6MPa, that is, the pump suction inlet pressure + pump head ≤1.6MPa, and the pump static pressure test pressure is 2.5MPa. Please indicate the system working pressure when ordering.
When the working pressure of the pump system is greater than 1.6MPa, it should be mentioned separately when ordering, so that the flow-through part and the connection part are made of cast steel.
2. The environmental temperature of the mechanical pump seals of the pump is less than 40℃, and the relative humidity is less than 95%.
3. The volume content of solid particles in the medium conveyed by the mechanical seals of the pump does not exceed 0.1% of the unit volume, and the particle size is >0.2mm.
Note: If the medium used is with fine particles, please specify when ordering so that the manufacturer can use wear-resistant mechanical seals.
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