Silk is getting more and more people's attention and love, because it is very light, warm performance is also good, and silk has natural antibacterial properties, but many people do not know how to choose a good silk quilt.
A silk engineer of a silk production company said that when buying silk quilts, some merchants put the quilt tightly. When the customer proposes to look at the silk material, it may be rejected by the merchant on the grounds of fear of tearing down the quilt. It is best not to buy this situation, it is likely to have "catty".
Good quality silk is usually zippered at the corners or edges so that consumers can see the length and color of the silk. Silk is generally top grade with jade white, long silk and elastic. If the silk is found to be very white, it may be bleached. If the burning point of the silk is very low, it will be extinguished soon after burning. The smoke emerging from the burning is white, accompanied by the burning smell of burning feathers. The burnt ash is brittle and brittle, and the hand is pinched into powder. It is really silk.
In addition, you can also identify the authenticity of silk by looking at the electrostatic response. Firmly rub the silk exposed at the zipper opening for about one minute, then let the silk suck the shredded paper of the size of the millet. If you can pick up the paper dust, it means that it is a chemical fiber or a large amount of chemical fiber, because pure silk does not generate static electricity.
In the maintenance of silk quilts, there are also some places to pay attention to. When not in use, the silk should be air-dried first, folded and placed in a plastic bag, but a small number of holes should be placed on the plastic bag to breathe. Be careful not to press on the top and store in a cool dry place.
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Site Selection for Mass Flow Meter Installation
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone, out of touch with any other device. There must be 3 times the size of sensor between 2 sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold, especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and transformer, better 5m at least. Such device influences the performance of drive coil and pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
e) Make sure Ex-mark meet application requirements if in hazardous area.
f) Build a sunshade if the meter is under direct solar radiation. g) Keep the meter from corrosive liquid.
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Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeters.com