Glass rotor flowmeters are widely used in various industrial applications due to their simplicity, ease of operation, and clear readability. These devices are available in multiple types, such as standard, reinforced, compact, corrosion-resistant, laboratory, insulated, alarm-equipped, and high-pressure models, making them suitable for a wide range of environments. Choosing the right glass rotor flowmeter is crucial for accurate and reliable measurements.
When selecting a glass rotor flowmeter, several factors should be considered. First, the performance characteristics of the device matter. If the price remains consistent, it's preferable to have the needle valve positioned at the top of the flowmeter. For larger flow ranges, a direct scale design is more appropriate, as it offers a simple structure and compact size. In cases of small flow measurement, ball float types are recommended because they provide stable readings, resist dust accumulation, offer high accuracy, and ensure good interchangeability.
Price is another important consideration. Higher precision generally comes with a higher cost, so it’s essential to choose an accuracy level that matches the intended use. For instance, if the goal is simply to control the flow rate during operation and maintain stability afterward, then high precision may not be necessary.
The type of medium being measured—whether liquid or gas—and its chemical properties also play a key role. Corrosive media require corrosion-resistant flowmeters to ensure long-term performance. Additionally, for large-diameter flowmeters, extra support may be needed to prevent pipeline bending. During installation, care must be taken to avoid excessive force that could damage the conical tube.
To protect the flowmeter from contaminants, a filter should be installed upstream. If the fluid has pulsating flow, a buffer can help stabilize the measurement. When operating the flowmeter, the upstream control valve should be opened gradually to prevent the float from rising too quickly, which could affect measurement accuracy. It's also recommended to operate the flowmeter within 60% of its maximum rated flow to ensure optimal performance and longevity.
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