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Published on: January 5, 2022 Clicks: 71
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The mechanical seal is a mechanical part used to seal the rotating shaft and the stationary pump chamber. The sealed part is a cylindrical area, the shaft in the equipment rotates and penetrates inside and outside the equipment, and the body part is still and full of fluid medium inside. Driven by pressure difference, concentration difference and temperature difference, fluids inside and outside the equipment exchange with each other; "Sealing" means to control the fluid exchange between internal and external areas, so that“
Published on: December 11, 2020 Clicks: 90
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The mechanical seal manufacturer introduced the system composition shaft seal box. In the past, the shaft seal box containing mechanical seal was a stuffing box designed for soft packing seal. It is not suitable for holding mechanical seals. Not only is the size too small, the gap too narrow, but also the simple cylinder shape is not suitable. The standard of oversized mechanical seal shaft seal box has been formulated abroad. In addition, the United States_ Durametalek and British Fluid
Published on: October 30, 2020 Clicks: 81
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The technical requirements of mechanical seal for kettle are that the seal ring is the general name of dynamic ring and static ring (the same below), and it is the main component of mechanical seal. To a great extent, seal ring determines the service performance and life of mechanical seal, so some requirements are put forward for it. There shall be enough strength and rigidity to avoid damage under working conditions (such as pressure, temperature and sliding speed), and the deformation shall be as small as possible,
Published on: October 15, 2020 Clicks: 92
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When the mechanical seal manufacturer introduces the ideal sealing machine, it is necessary to understand the leakage first. If the leakage principle is understood, then the corresponding sealing mechanism will be formed. There are three kinds of leakage. One is through leakage, that is, leakage between the sealing surface gaps. The other is leakage, that is, leakage of the sealed fluid through the capillary tube of the seal material. The third is diffusion, that is, under the effect of concentration difference
Published on: September 26, 2020 Clicks: 175
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Structural features of 205 type mechanical seal for kettle: 205 type mechanical seal for kettle is double end face, multi spring unbalanced structure. The purpose of sealing is mainly achieved by the pressure difference between the sealing liquid in the sealing chamber and the sealed medium. The sealing liquid needs another set of device to circulate. The whole system is complex. Therefore, it is only used for sealing flammable, explosive, toxic and strongly corrosive media in special occasions. Friction pair
Published on: September 12, 2020 Number of hits: 116
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Mechanical seal factory tutor you to clean and check! The working principle of mechanical seal requires that there is no impurity inside the mechanical seal. Before assembling the mechanical seal, the moving ring, stationary ring, shaft sleeve and other parts shall be thoroughly cleaned. Key inspection: 1. Whether there are scratches, cracks and other defects on the surface of the moving and stationary rings, which will cause serious leakage of the mechanical seal. If possible, special tools can be used to check the seal
Published on: September 12, 2020 Clicks: 139
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Commissioning test of mechanical seal for double end kettles (including 2001 and 2002 models) (1) Static pressure test:. Cycle B
Published on: July 15, 2020 Clicks: 211
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Features of mechanical seal for kettle 1. The mixing shaft is relatively long, and there is a mixing paddle at the lower end, so the mechanical seal for pump has a large swing and oscillation contrast, which makes the dynamic ring and the static ring can not fit perfectly. Usually, the mixing shaft needs to be equipped with a bottom bearing or a central bearing. In order to reduce the influence of shaft swing and oscillation on the seal, add a bearing near the seal, and first consider that the dynamic ring and static ring have better floating performance. 2、
Published on: June 15, 2020 Clicks: 102
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Let the manufacturer of kettle mechanical seal tell you the external reasons that affect the pump mechanical seal! （1） The axial displacement of the pump shaft The sealing surface of the mechanical seal should have a certain specific pressure (0.4~0.6MPa) to achieve the purpose of sealing. The tightness of both ends can be adjusted by the spring. To ensure this specific pressure, the pump shaft shall not have too much displacement (≤ 0.5
Published on: May 31, 2020 Number of hits: 95
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During the operation of centrifugal pump, the pump idling is not allowed. The majority of users "turn pale" at the idling of centrifugal pump. The reason for this is that they do not understand the causes of idling and do not know how to solve it well. In fact, the centrifugal pump will not cause damage (within 1 minute) when idling for a short time. The reason for the centrifugal pump idling is that the inlet medium of the pump is insufficient
Published on: April 30, 2020 Number of hits: 249
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The mechanical seal manufacturer introduces the advantages and disadvantages of the product. 1. Advantages (1) The structure is reliable, and the leakage can be limited to a small amount. As long as the surface roughness and straightness of the main sealing surface can meet the requirements, and as long as the wear resistance of the material is good, the mechanical seal can achieve a small amount of leakage, or even the leakage can not be seen by the naked eye. (2) Long life. In mechanical seals, the main wear part is the seal friction pair
Published on: April 18, 2020 Clicks: 123
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Normal operation and maintenance of mechanical seal for kettle 1. Preparations and precautions before startup a. Fully check whether the mechanical seal, auxiliary devices and pipeline installation are complete and meet the technical requirements. b. Static pressure test shall be carried out before starting the mechanical seal to check whether there is leakage of the mechanical seal. If there are many leaks, find out the causes and try to eliminate them. If it is still invalid, it shall be disassembled for inspection
Published on: March 28, 2020 Number of hits: 88
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Common gasket performance of kettle mechanical seal I) When using the valve, the original gasket is often replaced according to the specific situation. Common gaskets include: rubber flat washer, rubber O-ring, plastic flat washer, PTFE wrapped washer, asbestos rubber washer, metal flat washer, metal profiled washer, metal sheath washer, corrugated washer, spiral wound washer, etc. (1) Rubber
Published on: March 14, 2020 Clicks: 141
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Cause analysis of thermal damage of mechanical seal for kettle thermal damage is mainly overheating. It is difficult to calculate the thermal effect of mechanical seal, and it can only be designed correctly from the perspective of considering thermal influence factors, but the friction coefficient pV value and thermal conductivity, dry running performance and practical experience must be known. Thermal damage includes the following types: 1) Thermal cracking, usually under the action of excessive thermal stress, the sealing ring
Published on: February 29, 2020 Number of hits: 150
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