Ventilation butterfly valve how to prevent stuck

Ventilation butterfly valve is how to prevent the thermal expansion and contraction caused by the stuck case? The construction principle of this ventilated butterfly valve is directly related to it. Let's enumerate the design standards and structural dimensions of the ventilation butterfly valve.

Ventilation butterfly valve is mainly made of steel plate welding, with a short structure, light weight, easy installation and so on. Ventilation butterfly valve has small drive torque, flexible opening and closing, and easy operation. Vented butterfly valve body is provided with an oil seal retaining ring, there is no visible gap between the seal pair, the leakage rate is small. Large expansion gap between the ventilation butterfly valve and the valve body can effectively prevent the phenomenon of seizing due to thermal expansion and contraction.

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