The metal tube float flowmeter consists of a body spine and a watch pointer indicator. In addition to the local indication of instantaneous flow, it can also transmit a 4-20mA DC electric signal far away. The overall modular design makes it possible to quickly increase the field. Lower limit switch, flow accumulation function, each function unit board is an insert structure, with the features of simple, convenient, accurate positioning of replacement parts.
Why traffic conversion? In the production process, we calibrate the float flowmeter with water or air when calibrating the metal tube float flowmeter. Due to the different state of the medium and the timing of the actual application, according to the measurement principle, the flow value and the calibration time represented by the same position of the float in the measuring tube are different. In order to correctly select the specifications of the flow meter and use the instrument in the field, It is necessary to know the flow conversion relationship between them. In addition, the floater flowmeter industry standard stipulates that its accuracy is relative to the full scale. Therefore, when the user uses it, the common flow rate should be more than 60% to 80% of full scale. If it is used below 50%, the relative error will be As the accuracy increases, the accuracy will be affected. If the flow exceeds the full scale, it cannot be measured normally. Therefore, the proper instrument can only be selected after correct flow conversion. The basis for the conversion of the metal tube float flow meter is based on two main principles: the theoretical calculation formula of the float flow meter and the state equation of the ideal gas. ( a) is the theoretical calculation formula of the float flowmeter, and (b) is the state equation of the ideal gas. Float flowmeter calculation formula (1) Where: Q - volume flow a - flow coefficient Fk - the maximum diameter of the float and the same height between the cross-sectional area of ​​the cone tube g - gravitational acceleration Vf - float The volume Ïf - the density of the float Ï - the density A of the fluid to be measured - the maximum cross-sectional area of ​​the float (in units of the formula cm, g, s) The equation for the state of the ideal gas (2) where: P0, P1—absolute pressure T0 in two states, T1—absolute temperature in two states V0, V1—volumes in two states The following two relations can be derived from the state equation of an ideal gas: a. (3) B Density Relation (4) In the formula: M - the mass of the medium Ï - the density of the medium Q - the flow of the medium
In addition , the industry standard for floater flowmeter stipulates that its accuracy is relative to full scale, so when the user uses it, its common flow rate is more reasonable when it reaches 60% to 80% of full scale, if it is used in full Below 50% of the range, the relative error will increase, and the accuracy will also be affected. If the flow exceeds full scale, it is impossible to measure normally. Therefore, only the correct flow conversion can select the appropriate instrument.
Polyurethane System For Shoe Sole
1. Polyester system for safety shoes, single and double density
2. Polyester system for casual shoes, sports shoes
3. Polyester system for lady's high heel shoes, low density and high hardness
4. Polyether for insole/outsole
A Pu system for shoe soles refers to the use of polyurethane (PU) material in the manufacturing of shoe soles. PU is a versatile and durable material that offers several advantages for shoe soles.
Here are some key features and benefits of using a PU system for shoe soles:
1. Cushioning: PU provides excellent cushioning and shock absorption properties, making it ideal for footwear that requires high levels of comfort and impact protection.
2. Lightweight: PU is a lightweight material, which helps reduce the overall weight of the shoe, making it more comfortable to wear and reducing fatigue during extended use.
3. Flexibility: PU offers good flexibility, allowing the shoe sole to bend and flex with the natural movement of the foot. This enhances comfort and prevents stiffness or discomfort during walking or running.
4. Durability: PU is highly durable and resistant to wear and tear, making it suitable for long-lasting shoe soles. It can withstand repeated use and exposure to various environmental conditions without losing its structural integrity.
5. Slip resistance: PU can be formulated with specific additives to enhance its slip resistance properties, providing better traction and grip on different surfaces. This is especially important for safety footwear or shoes used in slippery conditions.
6. Design versatility: PU can be molded into various shapes and designs, allowing for greater design flexibility and customization options for shoe soles. This enables manufacturers to create unique and visually appealing footwear.
7. Water resistance: PU can be made water-resistant or waterproof, which helps protect the shoe sole and the foot from moisture, rain, or other wet conditions.
Overall, a PU system for shoe soles offers a combination of comfort, durability, flexibility, and design versatility, making it a popular choice for footwear manufacturers and consumers alike.
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