Why is the rotary paddle level switch the first choice for hot melt adhesive powder level measurement?

　　Hot melt adhesive powder is a fine chemical with translucent powder particles. In its production process, a level measuring instrument is needed to measure and control the high and low levels of hot melt adhesive powder. Among many level switches, the rotary paddle level switch can be said to be the first choice for hot melt adhesive powder level measurement. Why do you say that?

Hot melt adhesive powder

1. Hot melt adhesive powder production process

　　Hot melt adhesive powder is mainly produced by chemical reaction of isophthalic acid, polyethylene glycol, etc. in a reactor, and then processed by crushing, dehydration, pulverization and other processes. The following figure shows the specific production process of hot melt adhesive powder:

Schematic diagram of hot melt adhesive powder production process

2. Measurement requirements for hot melt adhesive powder

　　Hot melt adhesive powder is widely used in the rotational molding industry such as clothing, automobile interiors, large hollow containers, water tanks, toys, and incubators due to its strong stability, high viscosity, and no odor.

　　In the entire production process of hot melt adhesive powder, accurate measurement of the high and low material levels of the finished hot melt adhesive powder silo is indispensable. However, due to the characteristics of hot melt adhesive powder itself, the instrument measurement requirements are relatively special, which are particularly reflected in:

　　1. The instrument should have good sealing performance and high protection level.

　　The powdered hot melt adhesive makes the on-site environment extremely harsh. If the sealing of the instrument is not good, it will affect the stable operation of the instrument. In view of this special working condition, the instrument protection level should reach IP65 or above.

　　2. The instrument is required to have explosion-proof function and obtain dust explosion-proof certificate

　　Dust explosion refers to the explosion phenomenon that occurs when combustible dust suspended in the air touches an open flame or spark. The most common dust explosions are coal powder, flour, wood powder, sugar powder, corn powder, potato powder, dry milk powder, aluminum powder, zinc powder, magnesium powder, sulfur powder, etc.

　　A combustible dust explosion generally requires three conditions: the dust itself is explosive; the dust must be suspended in the air and mixed with the air to an explosive concentration; and there must be a fire source sufficient to cause a dust explosion.

　　Since hot melt adhesive powder is in the form of powder with a fineness of 40-80 mesh, there is a risk of explosion. Therefore, for safety reasons, the instrument used for level measurement must obtain a dust explosion-proof certificate.

3. Comparison of key performances of different level switches

Key performance comparison table of different level switches

　　It is not difficult to see from the above table that among several common level switches, the Jiwei Rotary Paddle Level Switch has a high cost-effectiveness and outstanding overall performance indicators, making it an ideal choice for hot melt adhesive powder level measurement instruments. In addition, the Jiwei Spin-11 Rotary Paddle Level Switch also has features and advantages that other Rotary Paddle Level Switches do not have.

Counted as a rotary level switch

4. Features and advantages of the Spin-11 rotary paddle level switch

　　In order to better understand the characteristics and advantages of the Jiwei rotary paddle level switch, the Jiwei Spin-11A standard rotary paddle level switch is taken as an example to introduce as follows:

　　1. Use imported motors, micro switches and bearings;

　　2. Made of 304/316L stainless steel or carbon steel, more durable;

　　3. Vibration-proof structure and double bearing design ensure smooth operation and long service life;

　　4. Protection grade reaches IP65;

　　5. Passed gas and dust explosion-proof certification, with a wider range of applications;

　　6. The motor and mechanical control are integrated, easy to replace and repair.

The Spin-11A standard paddle level switch made of 304/316L stainless steel or carbon steel is suitable for measuring most solid particle powders. Due to the introduction of full-process production management and testing, the product has higher reliability compared with similar domestic products.