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What is the approximate price of a water flow meter?
2. What is the flow meter with a scale on the glass tube on the pipeline?
The flow meter with a scale on the glass tube on the pipeline is a glass rotor flow meter.. This is an intuitive flow meter based on the principle of constant pressure drop and variable area measurement. The core structure of the working principle is a vertical conical glass tube and a float that can move freely inside the tube. When the fluid flows from bottom to top, a pressure difference is generated between the upper and lower parts of the float, pushing it up. When the upward force and buoyancy exerted on the float reach equilibrium with its own gravity, the float becomes stable at a certain height. At this point, by reading the outer scale of the glass early core beam tube corresponding to the top of the float, the instantaneous flow rate value can be obtained.
2. Main features * Simple structure, low price, easy installation and use. *The reading is intuitive, allowing for direct observation of the fluid flow state and float position. *The pressure loss is relatively small. *Vertical installation is required, and the glass material is fragile and not resistant to high pressure and high temperature. *The measurement accuracy is relatively low, usually ranging from 1.0 to 2.5 levels, and it belongs to commonly used industrial instruments. It is widely used in industries such as chemical, petroleum, light industry, medicine, food, paper, etc. It is used to measure the flow rate of clean and transparent liquids or gases, especially in situations that require direct display or process monitoring. Another occasionally mentioned type is the "glass tube liquid level
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3. Flow calculation formula for glass rotor flowmeter
The flow calculation formula for glass rotor flowmeter is: Q=K × √ (Δ P) or Q=C × A × √ (2g Δ h/ρ), where K and C are instrument coefficients and Δ P is pressure difference.
. 1. Core calculation formula: Glass rotor flowmeter belongs to variable area flowmeter, and its flow calculation formula is derived based on the principle of rotor force balance. The most commonly used basic form is: Q=K × √ (Δ P), where: • Q: volume flow rate of fluid (unit: m ³/h or L/min) • K: instrument coefficient (or flow coefficient), determined by the specific structure, rotor shape and material of the flowmeter, usually provided by the manufacturer after factory calibration, and is the core parameter for flow conversion. Δ P: The pressure difference before and after the rotor (unit: Pa), which is balanced with factors such as the rotors gravity, buoyancy, and fluid viscosity during stable flow, and can be regarded as a constant. Another more detailed and physically meaningful formula is: Q=C × A × √ (2g Δ h/ρ), where • C is the outflow coefficient, which is an empirical coefficient related to the Reynolds number and is usually calibrated by the manufacturer. A: The annular gap area between the rotor and the conical tube (unit: m ²) varies with the height of the rotor. • g: Gravity acceleration (9.8 m/s ²) • Δ h: Pressure head difference corresponding to rotor h