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Selection and classification of materials for magnetic flap level gauges
What I want to communicate with you today is the product material of the magnetic flap liquid level gauge. The material of the magnetic flap liquid level gauge needs different choices for different measuring media. This must be determined at the selection stage. Manufacturers generally use Tell the manufacturer the name of the tested medium, and the technicians of the manufacturer will recommend a good solution for you. In many cases, a variety of materials can be suitable, and it is necessary to make a comprehensive from the durability and product price. consider. But sometimes, for example, under extreme conditions, there is little room for choice, and some can only specify the use of a certain material, which is not at all sloppy.
The magnetic flap liquid level gauge is composed of a body, a flap box (composed of red and white magnetic small flaps), a float, and a flange cover, etc., and is used for the liquid level measurement of various liquid containers. Can be used for high temperature, explosion-proof, anti-corrosion, food and beverage and other occasions, for local display or remote display and control of liquid level. Although the process of making the magnetic flap liquid level gauge is very simple, the magnetic flap liquid level gauge is used as a measuring instrument, especially the remote transmission magnetic flap liquid level gauge. If it has not been audited by the Quality Supervision Bureau, there is no production license, and the product Quality cannot be guaranteed.
The magnetic flap liquid level indicator is installed outside or above the bucket tank, which is used to indicate and control the seal form in the bucket tank. A drain valve can be added as required. The connection flange can be a control instrument for customizing the liquid level. The indicator is composed of magnetic color chips. When the magnetic floating ball in the body tube rises with the liquid level, the color film is flipped to display the liquid level height. A magnetic switch or a remote transmitter is installed on the tube to output a switching signal or an analog signal. It is suitable for high temperature, high pressure, corrosion resistance and other occasions. It can be displayed and controlled remotely. The body pipe is made of seamless steel pipe, and the connecting pipe is welded with pull holes, and there is no scratch inside. The installation method can be side or top, and the lower end of the body is sealed.
The magnetic flap liquid level gauge is a contact type measurement, and the problem of wetted material should be considered when measuring. If it is ordinary water-based liquid or non-corrosive chemical raw materials, the use of 304 material can meet the requirements. For raw materials and finished liquids of some pharmaceutical factories, or used by edible oil production plants and fruit juice beverage production enterprises For magnetic level gauges, food grade 316L stainless steel is used. For corrosive acid-base liquids, such as sulfuric acid, nitric acid, hydrochloric acid, etc., anti-corrosion treatment needs to be performed on the basis of stainless steel. The process is generally lined with PTFE or other anti-corrosive materials. However, there is a special application, that is, 98% concentrated sulfuric acid can be used instead of 304 material when measured with a magnetic flap. Dilute sulfuric acid cannot, because the concentrated sulfuric acid will produce a dense passivation layer on the surface of 304 material. Preservative effect.
If the 4-20mA signal is not required to be transmitted remotely, power supply is not required. For units that require remote transmission, a remote transmission device needs to be installed, and it is generally bundled and debugged at the manufacturer. Remote transmission also requires power. The installation is generally flange butt connection. Currently, the commonly used side-mounted magnetic flap liquid level gauges in the market are DN25, DN20, etc., and can also be customized according to the manufacturer's requirements. It is not too troublesome if the site conditions allow it. The big advantage of Zui is that it looks intuitive. For some other highly volatile media, a magnetic flap is more suitable. There are also some media that require explosion-proof measurement, and a magnetic flap is also good.
At present, anti-corrosive magnetic flap liquid level gauges on the market are divided into stainless steel lined with PTFE, stainless steel with inner sprayed PTFE, stainless steel 316L, polypropylene (PP) or polyvinyl chloride (PVC). The anti-corrosion performance is strong and the stainless steel is lined with PTFE, but the price of stainless steel lined with PTFE magnetic flap level gauge is also high, because the PTFE material is not only expensive but also produces highly toxic gases at high temperatures. The production process requires high prices. Generally, the price of side-mounted 1 meter is above 2500 yuan. If it is not particularly required and the operating temperature is below 90 ° C, it is recommended to use PP or PVC type. It can be used in hydrochloric acid, sulfuric acid, nitric acid, and chlorination. For acid and alkali liquids such as sodium and sodium hydroxide, the price is more than half cheaper than that of tetrafluoroline.
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