The current working medium of the ball valve of the pipe jacking machine is mainly mud. The mud contains a certain amount of sand, stones and other solid substances that will wear, corrode and wash the ball valve pipes and balls, reducing the service life of the ball valve. This solution is temporarily designed to solve the problem of the ball valve. current situation. WESDOM has rich experience in designing, producing and manufacturing ball valves since its establishment, and has certain solutions to the main technical difficulties of ball valves. If the working medium is sand, there will be sand and stones that will impact the surface of the ball, causing serious wear and corrosion on the surface of the ball. It will not only reduce the service life of the ball valve but also cause leakage. This solution sprays WC on the surface of the ball to increase the surface hardness of the ball. Enhanced wear resistance of the ball and increased service life. Skills requirement: ① Design and manufacturing according to: enterprise standards; ② The structural length is according to: enterprise standards; ③ The flange standard is in accordance with the GB/T9113 standard; ④ Inspection and testing are...
Refining units in petrochemical industry are used to process crude oil to produce different types of fuel oils such as gasoline, diesel, kerosene, lubricating oil and chemical raw materials. The units mainly include atmospheric and vacuum units, catalytic cracking units, catalytic reforming units, delayed coking units, hydrocracking units and hydrofining units, etc. The basic requirements of valves for oil refining units are as follows: meet the process requirements, ensure the service life of the valves, facilitate operation and maintenance, compact structure, and light weight. Refinery Atmospheric and Vacuum Distillation Unit Introduction: 1. Crude oil electric desalination: Crude oil enters the device through the oil pipeline, because the crude oil contains salt and water. Therefore, valves with anti-corrosion performance should be used. Crude oil enters the heat exchanger at room temperature, mixes with demulsifier and deionized water, and exchanges heat to 120°C-140°C through the heat exchanger. After desalination, the heat is exchanged through a heat exchanger to 180°C-230°C and then sent to the initial distillation tower. 2. Initial distillation tower: The purpose of initial distillation is to produce reformed feedstock with low arsenic content, and to resist fluctuations in crude oil composition and water content fluctuations for the operation of atmospheric...
The filter is a small device that removes tiny solid particles in liquid or gas, which can protect the normal operation of the device. When the fluid enters the filter cartridge with a certain size filter, its volume is dispersed, and the clean filtrate is discharged from the filter. After exclusion, when cleaning is required, simply take out the sensory filter cartridge, dispose of it and reinstall it. 1. Filter inlet and outlet diameter: In principle, the inlet diameter of the filter should not be smaller than the inlet diameter of the matching pump, which is generally consistent with the diameter of the inlet pipe. 2. Nominal pressure selection: Determine the pressure rating of the filter based on the highest possible pressure in the filter piping. 3. The choice of mesh number: The selection of the mesh size of the filter mainly considers the filter to be intercepted, and is determined by referring to the process requirements of the medium process. For the pore sizes that can be intercepted by wire mesh of various specifications, please refer to the table “Screen Mesh Specifications” below. 4. Filter material: The material of the filter is generally the same as that of the...
Valve installation of 10 misunderstandings, it is easy to make mistakes… 1. Bolt is too long The bolts on the valve, only one or two threads over over the nut will do. It reduces the risk of damage or corrosion. Why buy a bolt longer than you need? Often, bolts are too long because someone doesn’t have the time to calculate the correct length, or the individual simply doesn’t care what the end result looks like. It’s lazy engineering. 2. Control valves aren’t used for separate isolation Whilst isolating valves takes up valuable space, it is important that personnel can be allowed to work on the valve when maintenance is required. If space is a constraint, and if gate valves are considered too long, at least install butterfly valves, which take up hardly any space at all. Always remember that for maintenance and operations that have to be carried out standing on them, it is easier to work with them and more efficient to carry out maintenance tasks. 3. No pressure gauge or device installed Some utilities like to calibrate testers, and these facilities are usually well equipped for their field personnel to connect testing equipment, but some even have...
What is transmission joints? Transmission joints are also called, expansion joints, compensators, expanders, expansion joints. It can be divided into C2F type double flange transmission joint, CF type single flange transmission joint, CC2F type detachable transmission joint. It consists of main parts such as body, sealing ring, gland, extension and shortening pipe. It is a new product for connecting pumps, valves and other equipments with pipelines, connecting them through full bolts to make them become a whole with a certain displacement, so that they can be adjusted according to the installation size on site during installation and maintenance, and the axial thrust can be transmitted back to the whole pipeline during work. This not only improves the working efficiency, but also plays a certain protective role for pumps, valves and other equipment. Applicable medium of transmission joint: The force transfer joint is mainly suitable for conveying seawater, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, refined oil, air, gas, steam at a temperature of not more than 250 degrees and granular powder and other media. The use of the transmission joint: Transmission joint is a new product for pumps, valves, pipelines...
Transmission joint, also called double-flange transmission joint, single-flange transmission joint, detachable transmission joint, expansion joint, compensator, expander, expansion joint, is a new product for connecting pumps, valves and other equipments with pipelines, which is connected by full bolts to make them become a whole and have a certain displacement, so that they can be adjusted according to the on-site installation dimensions when installing and repairing, and can be used when working to The axial thrust is conveyed to the whole pipeline, which not only improves the working efficiency, but also can play a certain protective role for pumps, valves and other equipment. The use range of transmission joints: Because this series of products are metal manufactures, which have high tensile and compressive strength, superior soft sealing performance, easy loading and unloading and other functions, they are widely used in electric power, metallurgy, water supply and drainage and sewage treatment and other industries, and they are mainly used in the connection between pumps and valves and pipelines. It has a certain multi-directional displacement effect in pipeline operation, which can relieve the blind thrust in pipeline operation and play a certain protective effect on pipeline, especially the installation and maintenance of pipeline...
Ball valve application occasions: Ball valves many unique features determine the use of ball valves relatively wide range of occasions, usually in the two-position adjustment, sealing performance is strict, slurry, wear and tear, shrinkage channel, open and close quickly (1/4 turn open and close), high pressure cut-off (differential pressure is large), low noise, air pockets, and cavitation phenomenon, a small amount of leakage to the atmosphere, operating torque is small, low resistance to fluid piping system, the recommended use of ball valves. Ball valves are also suitable for lightweight structure, low-pressure cut-off (small differential pressure), corrosive media in the piping system. In the cryogenic (deep cold) devices and piping systems can also choose ball valves. The principle of application of ball valves: ① Oil, natural gas transmission line, the need to clean the pipeline, and need to be buried in the ground, the choice of full diameter, fully welded structure of the ball valve; ② Buried in the ground, select the full diameter welded connection or flange connection of the ball valve; branch pipe selection of flange connection, welded connection, full diameter or reduction of the ball valve. ③ Refined oil pipeline and storage equipment, choose the flange connection of...
There are several differences between valve flanges, socket welds and butt welds: 1. Flat welding, butt welding and socket welding flanges Pipe flange welding has flat welding, butt welding and socket welding flange form Socket welding is generally inserted into the pipe flange for welding, butt welding is a butt welding flange, the pipe and butt surface butt welding, socket weld can not be ray detection, butt welding can be, so for the weld detection requirements of high recommended butt welding flange. 2. A few differences and applications General butt welding requirements than socket welding requirements, welded quality is also good, but the means of detection is relatively strict. Butt welding to do ray detection, socket welding to do magnetic particle or penetration testing can be (like carbon steel to do magnetic particle, stainless steel to do penetration). If the pipeline fluid welding requirements are not high, it is recommended to use socket welding, which is easy to test! Socket welding connection form most are used in small diameter valves and pipes, fittings and pipe welding. Small diameter pipes are generally thinner in wall thickness, and easy to wrong edge and ablation, butt welding is more complex, and more suitable...
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