International muffler check valve how to maintain and maintain?
The function of the muffler check valve is to stop the flow in the opposite direction and only allow the medium to flow in one direction. Usually this kind of valve is automatic working, the valve flap opens under the fluid pressure flowing in one direction; when the fluid flows in the opposite direction, the valve flap is acted upon by the fluid pressure and the self-weight of the valve flap to cut off the flow. Should not be used for containing solid particles and larger viscosity media. The...
Electric control valve closed lax treatment
Electric control valve is to regulate the flow of special media valve, the valve based on the measured parameters (such as temperature, pressure, flow, etc.), in order to constant measured parameters for the purpose of automatic control valve opening. Precisely because of the electric regulating valve precision adjustment function, the valve leakage as the weakness of such products. The following describes several control valve leakage treatment. 1, the implementing agencies zero set...
Asphalt gear pump working characteristics
Asphalt gear pump gear pump, but also a pump. Asphalt gear pump is mainly used in small flow, high lift water systems, such as drinking water supply system, pressure boiler water supply system, high purity water purification system. Asphalt gear pumps generally have the advantages of high output, low energy consumption and low manufacturing cost. They can be used for heat preservation, heating and cooling of transported liquids and pumps by conducting oil, steam, hot water, cold water and other...
Why pump cavitation occurs?
First, the causes of cavitation Cavitation is caused by the liquid vaporization, the liquid molecules escape the liquid surface, a process of gas molecules, known as "vaporization." The degree of vaporization of liquid pressure and the size of the high and low temperature. Dissolved in the liquid gas, pressure and temperature changes will be released, the formation of cavitation. When the internal pressure of the liquid drops below the saturated vapor pressure of the liquid at the...
Valve body parts suitable for working temperature introduction
Valve body parts suitable for working temperature introduction 1 Overview Valve design and material selection must be one of the key issues to consider the working temperature of the valve. In order to regulate the appropriate working temperature of the valve body material, suitable working temperature and related to the valve body material for petrochemical, chemical, fertilizer, electric power and metallurgical industries in China from the material properties of various types of valve steel...
The development of China's electric valve industry unfavorable and favorable factors
Electric valve is an important production and life of mechanical devices, has been widely used in all walks of life. However, the current development of China's electric valve industry is not balanced, with good domestic environment and development prospects, there are many unfavorable factors. 1. Favorable Factors (1) Prospects Good Investment Adviser's "2016-2020 China Valve Industry Investment Analysis and Forecast Report" said that with the continuous improvement of...
Valve installation of the five major points
1 direction and position Many valves have directivity For example, cut-off valves, throttle valves, pressure reducing valves, check valves, etc. If installed anti-flip, it will affect the use of effects and life expectancy (such as throttle), or does not work (such as pressure reducing valve) Danger (such as check valve). General valve, the direction of the valve body signs. In case of no, should be based on the working principle of the valve, the correct identification. Valve valve cavity...
Chiller expansion valve installation and matching
Expansion valve chiller refrigeration system as the four components of large chiller chiller in a large chiller application, the appropriate choice of expansion valve and the normal installation of a direct impact on the cooling capacity of screw chillers and the stable operation of the refrigeration system . First, matching According to R, Q0, t0, tk, the loss of resistance of the liquid lines and valves to carry out the steps: Determine the pressure difference across the expansion valve;...
How to assemble pipeline booster pump
(1) Perform a complete scrub and inspection of all parts before assembling the pipe booster pump. Inspect parts for signs of scars, wear, and cracks. If any problems are found, they should be handled (repaired or replaced) before assembly. (2) Measure the outer diameter of the impeller and the inner diameter of the seal ring with a vernier caliper. Record the results on the record and calculate whether the clearance is between 0.4 mm and 0.5 mm. (3) shear mat: shear bearing gland, pump cover...
Japan SMC solenoid valve "bit" and "through" each mean
Solenoid valve in the liquid system used to achieve the liquid off or flow direction changes, it usually has a coil can be driven by electromagnetic force driven spool, spool in different locations, the solenoid valve access It is different. There are several working position of the spool, the solenoid valve is called a few solenoid valve: valve body interface, which is the number of solenoid valve access, there are several access ports, the solenoid valve is called a few pass solenoid valve....
Control valve characteristics and selection method
Regulating valve is a commonly used actuator in automatic control system, which is used to adjust the flow of controlled object. Correct choice of regulating valve, is to adjust the quality assurance system control. On the composition of the control valve, flow characteristics were described in detail, and gives the control valve selection method and should pay attention to the problem. 0 Foreword Regulating valve is a commonly used actuator in automatic control system, which is the main...
Cavitation pump the most professional information
First, the pump impeller cavitation: pump impeller cavitation phenomenon troubled the normal operation of the pump a major problem, the most direct manifestation of pump impeller cavitation is the impeller damage to the pump impeller, seriously affecting the good performance of the pump, directly endangering the safety of production. Second, the process of cavitation pump: Pump in operation, if the over-flow part of the local area (usually impeller blades imported somewhere later), for some...
Explosion-proof gear pump safety valve installation and piping layout design points
Explosion-proof gear pump safety valve installation and piping layout design points First, explosion-proof gear pump safety valve should be installed upright and close to be protected equipment or pipes. If not close to the arrangement, the total pressure drop across the pipe from the protected equipment or pipe to the safety valve inlet shall not exceed 3% of the pressure relief valve value. Second, the safety valve should be set overhaul platform. Arrange the weight of the safety valve to...
Fire valve knowledge of some working principles
The working principle is to use the temperature of the alloy can easily melt open to control the use of gravity and the role of the spring mechanism to close the valve. When a fire occurs, the flame invades the air duct and the high temperature melts the fusible alloy on the valve or causes the deformation of the memory alloy to automatically close the valve for occasions where the air duct and the fire protection zone are penetrated. Fire damper installed in the exhaust pipe exhaust valve,...
Magnetic pump should pay attention to what maintenance and maintenance work?
Magnetic pump in the course of daily use recommended that the majority of users should do the following maintenance work: (1) Check the magnetic pump pipeline and the combination of loose phenomenon. Rotate the magnetic pump by hand to see if the magnetic pump is spirited. (2) If there is abnormal sound of magnetic pump should stop immediately check the reasons. (3) Unscrew the diversion screw plug of the magnetic pump body, and pour water (or slurry). (4) close the outlet valve and outlet...
High temperature float level gauge applications and characteristics
Float level gauge by the float, plunger, transmission header and reed, resistors and other components. Float ball level gauge through the connection flange mounted on the top of the tank (which belongs to the plug-in), when the tank level changes float also moves up and down, due to the magnetic effect, the float level gauge reed switch by the magnetic Closure, the liquid level changes into electrical signals through the digital display header with a digital display of the actual position...
Germany forging the successful launch of chemical waste material plane save money and save time and effort
With the rapid economic development in our country and the increasing industrial scale, chemical waste from industrial production has also increased with each passing day. In order to rationally utilize and conserve resources, protect the environment, reduce production costs and achieve sustainable development, Hefei Hede Forging Machine Tool Co., Ltd. (hereinafter referred to as "Hede Forging"), through continuous research and exploration, successfully launched the first chemical...
Talking about the Technical Standard and Usage of Overhauling YCB Stainless Steel Circular Arc Pump Bearings
Talking about the maintenance of YCB stainless steel arc pump technical standards and usage First, the rolling bearings 1, the bearing and shaft with the use of base hole system, bearing and shell with the use of the base axis system. Bearing size tolerances and rotational accuracy of the value according to the provisions of GB307-84. 2, with the journal bearings and bearing housing bore hole according to the provisions of GB1031-83, journal roughness Ra value of less than 1.6μm, bearing...
Cause Analysis of Internal Gear Pump Pressure and Lift
Internal gear pump parts wear and tear can cause leakage, leakage caused by internal gear pump pressure and flow become smaller. Leakage between the sleeve and the gear end levitates over a large area and thus leaks in the body portion. About 50% to 70% of all this part of the drain leakage. Wear gear pump leakage to reduce volumetric efficiency, pump input power is much lower than the output power. The losses are all converted into heat, which can cause the pump to overheat. If combined with...
Stainless steel reactor mechanical seal selection
Stainless steel reactor mechanical seal selection 1, first of all to clear the basis for the choice of seal: the first is the pressure inside the reactor, the second is the nature of the work material. Another is the operating temperature of the device. 2, followed by a clear stainless steel autoclave used in the type of mechanical seal: the reactor used seal that is commonly referred to as two types of shaft seal, the first is the packing seal, the second is a mechanical seal, mechanical seal...
What is the characteristics of slurry pump, slurry pump What?
Slurry pump is a rather special centrifugal pump, in general, the slurry pump refers to the centrifugal force (impeller rotation of the pump) the role of the solid and liquid mixed media energy to increase a mechanical power conversion to medium Of kinetic energy and potential energy equipment, mainly for mines, power plants, dredging, metallurgy, chemicals, building materials and petroleum industries. What is the characteristics of slurry pump, slurry pump What? What is the characteristics of...
Valve function and selection of factors to be considered
Select the valve is based on operational and safety and economic rationality, the balance of comparative experience. The following preconditions must be proposed before choosing a valve: 1, physical properties (1) material status a. The material status of the gas material includes: physical property data, pure gas or mixture, whether there are droplets or solid particles, whether there is easy to condense the ingredients. b. The material status of the liquid material includes: (1) whether...
