Under normal circumstances, the regulator valve often stuck or blocked, this situation is particularly annoying, so let the macro ball valve to help you solve your troubles!
Fluorocrystalline mica, also known as Fluorphlogopite Mica, synthetic mica, artificial mica, synthetic mica crystal, belongs to the silicate type artificial mica crystal, is under the high temperature condition of 1500°C, through strict process conditions and material ratio, in platinum The mica crystals smelted in the yttrium have a chemical formula of KMg3(AISi3O10)F2(OH)-, and do not contain (OH)-. The (OH)-hydroxyl group is replaced by F-(fluoro), which is similar to the fluorite mica. Materials commonly used in the general industry are natural mica. Natural mica is an underground ore naturally formed and belongs to the class of silicates. Most of the industrial mica used is phlogopite (brown) and muscovite. Its ideal chemical formula is KAI2(AISi3O10)(OH)2. OH)-(Hydroxy), due to the presence of hydroxyl (water molecules), its performance in all aspects is far lower than that of fluorocrystalline mica.
The main characteristics of fluoride crystal mica:
1, high temperature: can work long-term in the 1100 °C environment.
The testing department of the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (nationally recognized testing institute) tested the thermal weight loss of 8% at 1100°C for 48 hours, and the melting and devitrification temperature was 1375°C.
2. Electrical insulation: The volume resistivity is 10 times higher than natural mica. Electrical breakdown strength is PTFE
Lean 10 times.
3, hot and cold blasting stability is very good
5 cycles of -40°C~70°C at the 5th Saibao Lab of the Ministry of Information Industry
Inspection, all qualified.
4, anti-corrosion:
Fluorophlogopite does not react with acid and alkali solutions, and does not react with water. Under the long-term (2 to 3 years) scouring of high-temperature and high-pressure water (including acid and alkali), the original clarity and transparency can still be maintained.
5, high frequency performance:
The dielectric constant of fluorite mica is 4.6 ε, and the dielectric loss is (1~4)×10 −4 tg δ, and the dielectric loss is very low. And because of the pure texture, all parameters are extremely stable.
6, optical properties
Since the fluorite mica contains less impurities, its light transmittance is compared from infrared to ultraviolet.
High, the transmittance is close to 100%.
7, Mosaic (Mosaicity):
The Mosaicite of fluorocrystalline mica is less than 0.25 degrees, which was produced in the experiment.
The neutron flame is not high enough to absorb multi-band light beams and is an ideal neutron monochromator test material.
8, vacuum deflation performance:
The evaporative volume of fluorite mica is low, and it is measured with a mass spectrometer and the trace gas released is only
O2, N2, Ar and other adsorbed gases. Since the H2O vapor is not released, this is extremely valuable for use as an electrical vacuum insulation material, which can greatly increase the service life of the vacuum device.
9, excellent physical properties:
Fluorocrystalline mica has atomicity flatness, transparency, separability and elasticity, not aging
It is not brittle and so on.
Due to the high temperature resistance, corrosion resistance, low frequency loss, and high bulk resistivity
Absorb multi-band light beam, excellent light transmittance and other advantages. Therefore it has become an ideal new material in the high-end area.
Fluorocrystalline mica Available in:
In the range of 180mm×53mm or ∮76mm, it can be processed into various shapes according to user requirements. Thickness within the range of 0.02mm~1.0mm can be allocated according to user requirements. The conventional thickness is 0.04~0.2mm.
Fluorine crystal (fluorphlogopite, artificial mica) mica film for observation window of high pressure boiler water level gauge in thermal power plant
Fluorphlogopite Mica Fluorophlogopite Mica,Fluorophlogopite Sheet,Synthetic Fluorophlogopite Mica,Fluorophlogopite Mica Fragments Changchun City Taiyuan FluorphlogopiteCo. Ltd. , https://www.micaslice.com
1) The welding slag, rust, slag, etc. in the cleaning method pipeline cause blockage or jamming in the orifice, guide part, and the lower bonnet balancing hole to cause strain and scratches on the surface and guide surface of the valve core, and the sealing surface. Indentation and so on. This often happens during the initial period after the new commissioning system and overhaul. This is the most common fault. In this case, it must be unloaded for cleaning. Dross is removed. If the sealing surface is damaged, it should be ground. At the same time, the bottom plug must be opened to flush the slag falling from the balance hole into the lower bonnet and the pipeline. Rinse. Before commissioning, let the regulating valve fully open, and the medium will flow into normal operation after flowing for a period of time.
2) External Scouring Method For some easy-to-precipitate, solid-particle containing media to be adjusted by ordinary valves, they are often blocked at the orifices and guides, and external gas and steam can be flushed at the bottom cover of the lower valve cover. When the valve is blocked or stuck, open the external gas or steam valve, and the flushing work can be completed without adjusting the valve, so that the valve can operate normally.
3) Install pipe filter method For small-diameter control valve, especially the ultra-small flow control valve, the throttle gap is very small, and the medium can not have a little slag. In the event of a blockage, it is advisable to install a filter on the valve front to ensure that the medium passes through. With the regulator used in the positioner, the positioner is not working properly, and the blockage of the throttle orifice is the most common fault. Therefore, when working with the positioner, it is necessary to handle the gas source. The commonly used method is to install an air filter pressure reducing valve on the gas line in front of the positioner.
4) Increase the throttling clearance method If the solid particles in the medium or the slag and rust that has been washed out in the pipe, etc., can cause troubles such as blockage or jamming due to the throttle opening, the throttling section may use a section with large throttling clearance. Flow element - throttle area for the opening of the window, the opening of the spool, sleeve, because of its throttling area concentrated rather than a circular distribution, the fault can be easily ruled out. If it is a single or double seat valve, the plunger-shaped valve core can be changed to a "V"-shaped valve core, or changed to a sleeve valve. For example, a chemical plant has a double-seat valve that often jams. After the sleeve valve is recommended, the problem is immediately solved.
5) The medium flushing method Uses the flushing energy of the medium itself to scour and carry away the easy-to-precipitate, easy-to-clog stuff, thereby improving the valve's anti-blocking function. Common methods are: 1 to change the flow closed type use; 2 the use of streamlined valve body; 3 the throttling mouth placed in the most powerful erosion, the use of this method should pay attention to improve the erosion resistance of the throttling material.
6) straight through to angle method straight through to the inverted S flow, complex flow path, upper and lower chamber dead space, providing a place for the precipitation of the media. Angle connection, the medium is like flowing through 90 elbow, good scouring performance, small dead zone, easy to design into streamline shape. Therefore, when using a straight-through regulator valve to produce a slight blockage, the angle valve can be changed to °C.
Solve the problem of stuck or jammed valves