 Turbine flowmeter is well known flowmeter, positive displacement flowmeters and Coriolis mass flowmeters are three types of repetitive accuracy the best products, and turbine flowmeter also has its own characteristics, such as simple structure, less machining parts , light weight, easy maintenance, large flow capacity and adaptability to high parameters. Changzhou Chengfeng's LWGY series turbine flow meter also draws on the advanced design of advanced flow meter technology at home and abroad, featuring high accuracy, good reproducibility, responsiveness, and ease of installation and maintenance. If it is equipped with a display instrument with special functions, it can also perform quantitative control, over-alarm, etc. It is an ideal instrument for flow measurement and energy saving.
Turbine flowmeters have a lot of small problems in the installation and operation, but they must pay attention to these details to ensure the accuracy of the flowmeter. If you do not pay attention to many details, you will find it difficult to find the problem when you use it. Today, we have summarized the problems that are easily overlooked. We hope that it will attract everyone's attention.
1, the piping requirements:
The inner diameter of the upstream and downstream piping of the turbine flow meter device point is the same as the inner diameter of the flow meter.
2. Requirements for straight section:
The necessary degree of the flow meter is installed on the pipeline (the pipeline is inclined within 50 degrees). When the device is installed, the flow meter axis should be concentric with the pipeline axis, and the flow direction should be different. The length of the pipeline upstream of the flowmeter shall have a straight pipe section of not less than 2D. If the installation site permits, the upstream straight pipe section is 20D and the downstream is 5D.
3, the requirements of the bypass pipe:
In order to ensure that the turbofan meter does not affect the normal operation of the medium during maintenance, the valve (cut-off valve) should be installed on the front and rear pipelines of the flowmeter, and a bypass pipeline should be provided. The flow control valve should be installed downstream of the flowmeter. When the flowmeter is used, the shutoff valve installed upstream must be fully opened to prevent the upstream local fluid from generating unstable flow.
4. Requests for the external environment:
The flowmeter is best to be installed indoors. When it is necessary to install it outdoors, sunscreen, rain, and lightning protection measures must be adopted so as not to affect the service life. Requirements for impurities in the medium: In order to guarantee the service life of the turbine meter, a filter should be installed in front of the straight section of the flow meter.
5, in the selection requirements:
The selection is within the regular flow range to avoid over-speed operation to ensure the desired accuracy and guarantee the normal service life.
When the flowmeter is running, it is not allowed to open the front and rear cover at will, and the related internal parameters are changed. Otherwise, the normal operation of the flowmeter will be affected. Beware of the device gaskets to ensure that no protrusions enter the pipe to avoid interference with normal flow measurements. The flowmeter collects pressure on the flowmeter pressure port at the time of calibration.
The debris in the pipeline should be cleared before the turbine front of the installation: debris, welding slag, rock, dust, etc. The filter introduced in the upstream device 5 micron mesh is used to block the droplets and sand. When the flowmeter is put into operation, the front valve should be slowly opened first, and then the rear valve should be opened to avoid damage to the turbine due to airflow shocks. Plus smooth oil should be operated according to the signboard. The number of refueling depends on the clean level of temperament, usually 2-3 times a year. The flowmeter may be damaged due to test pressure, purge piping or exhaust gas forming a turbine overspeed, and the turbine operating in reverse flow.
Changzhou Chengfeng flow meter is three decades in the industry, Cheng Feng meter footprints all over the country, to understand the actual needs of customers, targeted to give them the best solutions and the most suitable products, the right is the best .
Stainless Steel Precision Casting or Stainless Steel Investment Casting, silica sol process. It is a casting process with little or no cutting. Cast Stainless Steel is an excellent process technology in the foundry industry. Its application is very extensive. Stainless steel cast not only applies to the casting of various types and alloys, but also produces the dimensional accuracy of castings. The surface quality is higher than that of other casting methods, and even castings that are difficult to cast and which are difficult to cast have high temperature resistance and are not easily processed can be cast using investment casting.
In wax pattern process,we mix stearic acid and paraffin wax in wax pattern making,as you know,it is better than polyethylene,and the wax deformation is small.
In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at 24℃±1℃, which can make the castings much more stable,the internal tissues much more well-proportioned.
In shell hardening process,we use aluminium chloride to harden the shell.This can make the shell so hard that it can`t be distorted,at the same time the bug which the casting may have will be decreased.If there are letters or numbers in it,they will be much clearer.
In dewaxing process,about 95% of the castings suppliers adopt the original water dewaxing technics,but we using the advanced steam dewaxing technics,which we are very proud of.This can effectively avoid the air-hole and sand-hole,making the casting look much nicer.
In smelt process,we use middle frequency furnace,avoiding the emergence of the oxide; in molten steel control part,we use Germany-imported direct reading spectrometer machine,assuring its quality before the molten steel out of the furnace.During this process we use ERP production and management software to get the feedback information.
In shell-knock out process,we have special machines,which can decrease the hitting and knocking, easily made by manual shell knocking out.
In shot-blasting process,we have crawler-type and hanging shot-blasting machine,with steel shot 0.5-0.8,making the products smooth.Of course,if the customer wants it look much nicer,we also can carry out sand-blast treatment.
In heat treatment process,we use electric furnace,and adopt double-temperature control in order to heat the products equally.As a result, the products will have great metallurgical structure.
Our tolerance can reach at the grade of 5-7 according to our country`s tolerance standard.
In machining process,we have 12 CNC machining centers and some other machines, so we can make further machining if the customers need.
Products in stainless steel cast factory divide into Pump Valve Accessories Casts, food machinery casts, and architectural hardware casts.
Stainless Steel Precision Casting
Stainless Steel Precision Casting, Stainless Steel Investment Casting,Investment casting products,Cast Stainless Steel
Wei fang junlong precision casting Co.,Ltd , http://www.junlongcasting.com