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Common faults and solutions of mechanical seal for kettle 1. Fault phenomenon: leakage occurs at the sealing surface. Fault cause: screw thread is loose; The sealing surface is damaged. Troubleshooting: Retighten the screw; Regrind and polish the sealing surface. 2. Fault phenomenon: there is leakage at the valve. Cause of fault: the valve rod (needle) and valve port sealing surface are damaged. Troubleshooting: repair and replace the valve rod
Published on: November 27, 2020 Number of hits: 202
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Corrosion prevention of mechanical seal for kettle is very important. Today, I would like to share some common knowledge about corrosion prevention of non-metallic rings: 1. Graphite ring corrosion. There are three reasons for the corrosion of resin impregnated impermeable graphite ring: first, when the end surface is overheated and the temperature is greater than 180oC, the impregnated resin will break away from the graphite ring, reducing the wear resistance of the ring; Second, if the impregnated resin is not properly selected
Published on: November 28, 2020 Number of hits: 97
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Characteristics of reactor sealing device Understand the characteristics of different types of reactors to master the key points of mechanical seal design. 1. From the lubrication point of view, the mechanical seal used for the plug-in reaction kettle at the side of the mixing shaft generally does not have the problem of poor lubrication, and the liquid level of the medium in the kettle must be kept at a certain height. For the reaction kettle with shaft protruding from one side, the shaft is in cantilever state, so it is easy to produce
Published on: December 12, 2020 Number of hits: 108
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The leakage point of chemical pump The leakage point of chemical pump The mechanical seal for pump has a wide range of types and different models, but there are five main leakage points: the seal between the shaft sleeve and the seal between the shaft sleeve and the seal between the shaft sleeve Sealing between stationary rings Sealing between stationary ring and stationary ring seat Sealing between end cover and pump body
Published on: November 13, 2020 Clicks: 87
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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: 206
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204 Introduction to the basic knowledge of mechanical seal Mechanical seal (end face seal) is a device used to solve the sealing between rotating shaft and engine body. It is a device to prevent fluid leakage, which is composed of at least one pair of fluid pressures on the end faces perpendicular to the rotation axis, the elastic force (or magnetic force) of the compensation mechanism, and the auxiliary seal, which are kept together and sliding relatively. It is commonly used in pumps, compressors
Published on: April 15, 2020 Clicks: 192
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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 Clicks: 144
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The mechanical seal manufacturer introduces the typical fault types and properties. The mechanical seal damage types include chemical damage, thermal damage and mechanical damage. (1) Chemical damage 1) Surface corrosion If the metal surface contacts the corrosive medium, but the metal itself does not corrode, surface corrosion will occur. In order to prevent surface corrosion, corrosion resistant materials can be used. Stainless steel has good corrosion resistance because of this
Published on: February 29, 2020 Number of hits: 135
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Mechanical seal manufacturer's installation 1 Installation principle (1) Be familiar with the equipment. Before installing the mechanical seal, be familiar with the rotating speed and diameter of the shaft; Consider the manufacturing process of mechanical seal, relevant dimensions of seal chamber, service time of equipment, staff level of production equipment, etc. (2) Estimate the pressure of the medium. The sealing chamber pressure of centrifugal pump is usually
Published on: January 4, 2020 Number of hits: 122
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Technical requirements for main parts of kettle mechanical seal 1. Flatness and roughness requirements for sealing end face 2. Parallelism of sealing end face of stationary ring and moving ring and the end face contacting the auxiliary sealing ring shall comply with grade 7 tolerance in GB1184~80 Regulations on Form and Position Tolerances without Tolerance Indications 3. Surface roughness of contact between stationary ring and moving ring and auxiliary sealing ring shall comply with JB4127-8
Published on: January 1, 2020 Number of hits: 232
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Let the mechanical seal manufacturer tell you the installation and technical requirements of the mechanical seal of centrifugal pump! 1、 Technical requirements for matching parts of machine, pump and mechanical seal: 1. The maximum shaft bending shall not exceed 0.05mm. 2. All parts in the component meet the drawing requirements. 3. The gland shall be tightened after the alignment of the coupling, and the compression screws shall be tightened to prevent the flange surface from deflection.
Published on: October 15, 2019 Clicks: 132
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Does the mechanical seal include oil seal? The mechanical seal manufacturer tells you! Mechanical seals cover a wide range. It can be seen that this piece can help the equipment to create better sealing conditions, and can give the equipment more rapid operation. Although its structure is complex and precise, it is also because of this, so it is easy to use. Does the seal actually include an oil seal? 1. The oil seal is generally tight
Published on: December 21, 2019 Clicks: 317
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Technical conditions of kettle mechanical seal Only the kettle mechanical seal that meets the technical conditions is qualified. However, due to their too many models and different equipment, their requirements are different, and their production technologies are also different. So the quality of the products is different. The main purpose of formulating its technical conditions is to standardize the later production. Its technical conditions include:
Published on: December 17, 2019 Clicks: 170
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204 Overview of mechanical seal Mechanical seal (end face seal) is a device used to solve the sealing between rotating shaft and engine body. It is a device to prevent fluid leakage, which is composed of at least one pair of fluid pressures on the end faces perpendicular to the rotation axis, the elastic force (or magnetic force) of the compensation mechanism, and the auxiliary seal to keep the joint and relative sliding, and is commonly used in pumps, compressors, reactions
Published on: December 7, 2019 Number of hits: 156
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Instructions for use of kettle mechanical seal 1. Mechanical seal (end face seal) is a device to prevent fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, under the cooperation of fluid pressure, elastic force of compensation mechanism and auxiliary seal, to keep sticking and relatively sliding. 2. Mechanical seal for kettle, applicable to all kinds of steel kettle, enamel kettle, glass lined kettle mixing shaft and
Published on: December 3, 2019 Clicks: 154
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The mechanical seal manufacturer introduces the flushing scheme of the seal for the purpose of directly injecting liquid into the high-pressure side of the double or single seal, which is called "flushing". Generally, pumps shall be flushed, especially light hydrocarbon pumps. 1. Flush to dissipate heat. The heat generated by the liquid seal must be controlled. This can be achieved by flushing the seal chamber with liquid to take away heat and control the temperature rise. 2. Lower the liquid temperature. stay
Published on: January 15, 2020 Clicks: 131
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The mechanical seal manufacturer introduces the working characteristics of parallel water pumps: there are many ways to change the working conditions of the pump system, one of which is the performance synthesis of multiple pump equipment. When one pump cannot meet the working conditions, multiple pumps need to be connected in parallel or in series to obtain the desired flow and head. When the first water pump is connected with the suction pipe of the second or multiple water pumps, the outlet pipe
Published on: November 12, 2019 Clicks: 169
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What is the difference between the mechanical seal for the agitator and the mechanical seal for the pump? Mechanical seal for agitator kettle and mechanical seal for pump are mechanical parts used to seal rotating shaft and static 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, temperature difference, etc
Published on: November 9, 2019 Clicks: 145
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Measurement of end face wear of mechanical seal manufacturer 1. Weighing method The weighing method is to measure the mass change before and after the friction pair ring test (operation) to determine the wear amount. It is generally carried out on the balance, which is a simple and easy common method. 2. Length measurement This method is to determine the wear amount by measuring}.: f The normal dimension change before and after the end face test of the friction pair. Generally, there should be a measurement benchmark
Published on: March 14, 2020 Number of hits: 102
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204 Misuse of mechanical seal manufacturers 1. The greater the spring compression, the better the sealing effect. In fact, too much spring compression can lead to rapid wear and instant burning of friction pairs; Excessive compression makes the spring lose the ability to adjust the end face of the moving ring, leading to seal failure. 2. The tighter the dynamic ring seal diagram is, the better. In fact, too tight the dynamic ring seal is harmful and useless. First, intensify the seal ring and shaft
Published on: October 26, 2019 Number of hits: 117
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Mechanical seal is a shaft seal device of rotating machinery. Such as centrifugal pumps, centrifuges, reaction kettles, compressors and other equipment. Since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the shaft and the equipment, through which the medium in the equipment leaks outward. If the pressure in the equipment is lower than atmospheric pressure, the air flows to the equipment
Published on: July 1, 2020 Clicks: 90
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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: 87
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204 Mechanical seal manufacturer's introduction to mechanical seal of centrifugal pump I. Technical requirements for matching machine, pump and mechanical seal: 1. The maximum shaft bending shall not exceed 0.05mm. 2. All parts in the component meet the drawing requirements. 3. The gland shall be tightened after the alignment of the coupling, and the compression screws shall be tightened to prevent the flange surface from deflection. 2、 Mechanical seal for pump
Published on: December 24, 2019 Number of hits: 153
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Some key points of mechanical seal installation and disassembly There should be a layer of liquid film between the seal rings of mechanical seal, which has the following functions: 1. Support most of the water pressure load on the seal. 2. As a lubricant, reduce the friction heat generated by the seal ring. 3. Minimize rough contact to reduce wear rate. 4. As the heat transfer medium, transfer the direct area of the seal ring
Published on: October 12, 2019 Number of hits: 152
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The mechanical seal manufacturer introduces advantages and disadvantages 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 wearing part is the end face of the seal friction pair,
Published on: November 30, 2019 Clicks: 118
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Let 204 mechanical seal manufacturer tell you about the normal operation and maintenance of mechanical seals! 1. Preparations and precautions before startup a. Fully check whether the mechanical seal, accessory 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
Published on: September 24, 2019 Clicks: 93
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204 Cause of mechanical seal leakage (I) Leakage caused by pressure 1. Fault I: Mechanical seal leakage caused by high pressure and pressure wave Cause: The specific pressure of spring and the total specific pressure design are too large. When the pressure in the seal cavity exceeds 3MPa, the specific pressure of the seal face will be too large, the liquid film will be difficult to form, the seal face will be severely worn, and the heat generation will increase, resulting in
Published on: September 9, 2019 Number of hits: 218
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The mechanical seal manufacturer introduces the causes and analysis of common failure seal failure (I) The seal failure mainly has the following three reasons: 1. When the sealing surface is opened and the mechanical seal is repaired, 85% of the seal failure is not caused by wear, but has leaked before wear. When the sealing surface is opened, solid particles in the medium enter under the action of liquid pressure
Published on: August 17, 2019 Number of hits: 124
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Mechanical seal manufacturers have several structures to enhance lubrication. 1. End face eccentricity: for general mechanical seals, the center of the moving ring, the center of the stationary ring and the center line of the shaft are all in a straight line. If the end face center of a ring in the moving ring or the stationary ring is made to be offset from the center line of the shaft by a certain distance, the ring can constantly bring lubricating fluid to the sliding surface for lubrication when rotating. It should be noted that
Published on: August 10, 2019 Clicks: 110
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The mechanical seal manufacturer's introduction principle and requirements The mechanical seal refers to a sealing device formed by two sealing elements sticking together on a smooth and straight surface perpendicular to the axis and rotating relative to each other. It usually consists of static ring, dynamic ring, spring loading device (including push ring and spring box), auxiliary sealing ring (dynamic ring sealing ring, static ring sealing ring) and other elements, Anti rotation inside the anti rotation sleeve
Published on: July 30, 2019 Clicks: 122
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Common materials of mechanical seal shall be clean water at normal temperature: (dynamic) 9Cr18, 1Cr13 surfacing cobalt chromium tungsten, cast iron; (Static) resin impregnated graphite, bronze, phenolic plastic. River water (with silt), normal temperature: (dynamic) tungsten carbide, (static) tungsten carbide. Seawater, normal temperature: (dynamic) tungsten carbide, 1Cr13 surfacing cobalt chromium tungsten, cast iron; Resin impregnated graphite,
Published on: November 23, 2019 Number of hits: 82
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Let 204 mechanical seal manufacturer tell you the working principle of mechanical seal! Mechanical seal is a shaft seal device that can prevent leakage by a pair or several pairs of end faces that slide relative to the shaft under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and are matched with auxiliary seals. Selection of common materials for mechanical seal: purified water; normal atmospheric temperature; (Dynamic) 9CR18, 1CR13
Published on: July 9, 2019 Number of hits: 457
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Normal operation and maintenance of mechanical seal manufacturer 1. Preparations and precautions before startup a. Comprehensive inspection of mechanical seal, accessory devices and pipeline installation is complete and meets 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: October 29, 2019 Number of hits: 96
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204 Basic knowledge of mechanical seal 1. Basic concept of mechanical seal: mechanical seal refers to a device to prevent fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, and with the cooperation of the auxiliary seal, to keep sticking and sliding. The auxiliary seal of compensation ring is metal bellows, which is called bellows machine
Published on: July 2, 2019 Number of hits: 189
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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 Number of hits: 80
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The mechanical seal manufacturer introduces the problems that should be noticed in use. 1. Precautions during installation. a. Pay great attention to avoid the installation deviation during installation. (1) Tighten the gland after the alignment of the coupling. The bolts should be evenly supported to prevent the end face of the gland from deflecting. Check each point with a feeler gauge, and the error should not be greater than 0.05 mm. (2) Check the fit clearance between the gland and the outer diameter of the shaft or shaft sleeve
Published on: June 18, 2019 Number of hits: 117
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The mechanical seal for kettle has higher sealing requirements. When the shaft needs to bear greater radial force, the mechanical seal with built-in bearing should be selected, but it is generally not used as the bearing point of the shaft. If it is necessary to use this as the supporting point, the improved mechanical seal with T after the model shall be selected. Replace the built-in bearing of the mechanical seal for kettle with two tapered roller bearings, which can replace the
Published on: June 11, 2019 Clicks: 160
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204 Basic structure and primary characteristics of mechanical seal Mechanical seal is a kind of equipment used to deal with the seal between rotating shaft and engine body. It consists of at least one pair of end faces perpendicular to the rotation axis, sticking and sliding together under the effect of fluid pressure and tissue elasticity (or magnetic force) compensation and the cooperation of auxiliary seals to avoid fluid leakage. It is commonly used in pumps, compressors, anti leakage devices
Published on: June 1, 2019 Clicks: 179
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How to prolong the service life of mechanical seal of centrifugal pump? Listen to what the mechanical seal manufacturer said! 1. The centrifugal pump shaft has a large displacement. During the operation of the centrifugal pump, the sealing surface of the mechanical seal needs to have a certain specific pressure. Only in this way can the role of the mechanical seal be ensured. Therefore, the spring of the mechanical seal must have a certain amount of compression
Published on: May 28, 2019 Number of hits: 129
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Tips for installation and use of mechanical seal for kettle 1. Apply a layer of clean lubricant on the surface in contact with the seal during installation to facilitate smooth assembly. Recommended lubricants: soapy water, silicone grease, ethylene glycol ester or glycerin, etc. 2. The sealing cavity of the equipment shall be kept clean during installation, and the sealing parts shall be
Published on: August 24, 2019 Clicks: 127
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Let the mechanical seal manufacturer tell you how to replace the mechanical seal! Mechanical seal transmits power and motion transmission by mechanical means. Mechanical transmission is widely used in mechanical engineering, including belt transmission, gear transmission, chain transmission, worm and worm gear transmission, gear rack transmission and spiral transmission. Gear transmission can be used for high-power
Published on: May 16, 2020 Number of hits: 232
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Technical requirements for the use of mechanical seal for kettle The seal ring is the general name of dynamic ring and static ring (the same below), and 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 is enough strength and stiffness to prevent damage under working conditions (such as pressure, temperature and sliding speed), and deformation should be as far as possible
Published on: February 16, 2019 Clicks: 164
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204 Mechanical seal manufacturers teach you the washing skills of seals! Features of mechanical seal flushing technology The purpose of mechanical seal flushing is to prevent the accumulation of impurities, prevent the formation of air bags, maintain and improve lubrication, etc. When the flushing fluid temperature is low, it also has a cooling effect. Now Hengda Mechanical Seal will explain the technical features of mechanical seal flushing. 1. Internal scour and forward scour
Published on: November 10, 2018 Clicks: 107
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This paper introduces the form of mechanical seal for kettle and how to deal with the problem correctly in case of failure. The kettle mechanical seals are divided into the following six types: 201 type single end face single spring unbalanced seal, 202 type single end face multi spring unbalanced seal, 203 type single end face single spring balanced seal, 204 type single end face multi spring balanced seal, 205 type double end face
Published on: November 4, 2018 Clicks: 162
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Key points for overall inspection and installation of mechanical seal for kettle: 1. Check whether the model and specification of the mechanical seal to be installed are correct. 2. Check whether the dimensional accuracy, geometric accuracy and interrelation of the parts related to the installation of the main engine and mechanical seal meet the technical requirements. It mainly includes the following aspects: (1) The radial runout of the shaft (or shaft sleeve) where the mechanical seal is installed
Published on: November 6, 2018 Number of hits: 338
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204 What are some mistakes that should be paid attention to during the maintenance of mechanical seals? 1. The greater the spring compression, the better the sealing effect. In fact, the spring compression is too large, which can lead to rapid wear and instant burning of the friction pair; Excessive compression makes the spring lose the ability to adjust the end face of the moving ring, leading to seal failure. 2. The tighter the dynamic ring seal diagram, the better. The driving ring seal ring is too tight
Published on: November 21, 2018 Clicks: 157
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What are the key points of using mechanical seals for kettles? In the pump parts, mechanical seal is a very important part, and mechanical seal is also a vulnerable part. If the mechanical seal is damaged, the pump body will leak. If a direct coupled pump is used, the motor will be damaged once the medium in the pump body penetrates into the motor. Therefore, the quality of mechanical seals is crucial. want
Published on: November 23, 2018 Clicks: 153
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1. Preface: Kettle machinery is an important system equipment for industrial production. If leakage occurs in the production and application phase, it will have a negative impact on product quality, and will also emit toxic, explosive and flammable dangerous gases, posing a significant hazard to the ecological environment and the plant system itself. If the kettle machinery is overhauled for many times, the materials need to be transferred out and necessary
Published on: November 26, 2018 Number of hits: 150
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The mechanical seal manufacturer tells you the precise selection and application of mechanical seals for solid-liquid two-phase flow pumps? Due to the existence of abrasive particle media in solid-liquid two-phase flow, the selection of general mechanical seals often poses the following five hazards: ① Increased wear of seal face. Between sealing surfaces, separated mechanical sealing particles used by the pump leaked into the end face, which played an abrasive role and accelerated the wear of the sealing surface. ② Intermediate
Published on: October 28, 2018 Clicks: 211
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Use of mechanical seal for kettle 1. Before normal use, operate under normal pressure, and observe whether the temperature rise of the sealing part is normal and whether there is leakage. If there is slight leakage, run in for a period of time to make the end face fit more evenly until the leakage gradually reduces to normal. If the leakage does not decrease after 1-3 hours of operation, stop the machine for inspection. 2. Main
Published on: November 28, 2018 Clicks: 177
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The mechanical seal manufacturer tells you the corrosion type and protection method of the mechanical seal. The mechanical seal is often damaged. The common damage forms are mainly corrosion damage, thermal damage and mechanical damage. The corrosion damage of mechanical seal knowledge is more harmful. Due to the special structure of mechanical seal and different working environment and conditions, the forms of corrosion damage are also diverse.
Published on: November 13, 2018 Clicks: 160
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How should the joint mechanical seal manufacturer of synthetic polymer sealing material construct well? Before the joint construction of synthetic polymer sealing material, the adhesive body shall be inspected, the materials and tools shall be prepared, the construction temperature shall be selected, and the joint shall be treated. The coating of base course treatment agent should first be accurately proportioned and evenly mixed. When multi-component mechanical sealing base course treatment agent is used
Published on: September 27, 2018 Clicks: 223
