With the increasingly fierce market competition, quality and reduce consumption, high yield and high efficiency has become an important goal of production and management of enterprises. The installation and maintenance of various types of beverage pumps as the source of pipeline transportation have become the key factors that affect the efficiency of the entire line. Therefore, a comprehensive understanding of the pump installation and maintenance, for the stability of production efficiency has an extremely important role. Following the installation and maintenance of beverage pumps and local improvements do briefly explain. (7) For pumps installed vertically, there shall be a sealing leakage discharge point. When there is any leakage, the mechanical seal shall be checked in time and replaced if necessary. (8) adjust the outlet valve to ensure the pump operating point, to prevent overload; (9) Do not close the valve to run the pump more than 30 seconds; (10) under normal conditions of use, running 15,000 hours to 20,000 hours to replace the bearing; (11) long-term outdoor use, running 5,000 hours to be replaced bearings; (12) Lubricate the V-ring for 1,500 hours of operation. Second, the mechanical seal installation and improvement 1, installation In the structure of the beverage pump, the mechanical seal is the most accurate and the most sophisticated part of the installation. If the mechanical seal is improperly handled during installation, it will affect the service life of the seal and may cause the beverage pump to suddenly leak during operation, thereby affecting the production efficiency of the entire line. Mechanical seal is divided into moving ring and static ring in two parts, the general use of materials for graphite, carburizing resin, tungsten carbide, ceramics and other materials, the operation process is relatively high speed through the static and dynamic ring to complete the static and dynamic ring surface accuracy is very high , Usually to reach 0.8mmRa. Based on the structural and material considerations, check the static and dynamic ring contact surfaces for any damage or cracks prior to the mechanical seal installation, and wipe the surfaces of the static and dynamic rings with a soft, clean cloth. When installing, first remove the scale and stains on the bottom and side of the static ring installation groove, and then put the static ring into the installation groove smoothly to ensure full contact between the static ring and the bottom of the groove to avoid the axial rocking of the static ring. Pay special attention to keep the surface of the static ring at any time during the cleaning process, and finally move the ring slowly into the ring, gently rotate the ring around and observe the static and dynamic ring surface contact, when the ring is confirmed close contact, the impeller into the lock Tighten the bolt to complete the mechanical seal installation. At the start of the test, the following points need attention: (1) If a tandem or back-to-back mechanical seal is used, the seal / irrigant must be kept clear; (2) For back-to-back mechanical seals, ensure that the seal / flushing fluid is 1.5 bar to 2 bar above the pump pressure (internal pressure = system pressure + pump pressure) before pumping; (3) to adjust the flow of seal / rinse fluid, the temperature is less than 60 ℃ and must not exceed the boiling point, the temperature difference does not exceed 15 ℃; (4) For tandem mechanical seals, ensure unpressurized seal / rinsing fluid before starting; (5) When the medium contains solid particles, the flushing fluid is discharged directly.