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Extended stem butterfly valve is a specially designed industrial pipeline control equipment that perfectly solves the operational difficulties in special installation environments by extending the valve stem based on standard butterfly valves. This seemingly simple structural innovation plays an irreplaceable and important role in practical applications.
In the field of municipal engineering, extended stem butterfly valves have demonstrated unique advantages. For example, in deeply buried water supply pipelines, the operating mechanism of ordinary valves is often buried several meters underground, which brings great inconvenience to daily maintenance. The extension rod design can extend the operating handle above the ground, allowing staff to easily complete switch operations while standing on the ground. In a certain city's water supply network renovation project, the use of our extended stem butterfly valve has reduced the valve operation time from the original 30 minutes to 2 minutes, greatly improving work efficiency.
In industrial application scenarios, extended stem butterfly valves also demonstrate their capabilities. On the pipelines in the tank area of chemical plants, the medium often has corrosive or high-temperature characteristics. The design of the extension rod can extend the operating mechanism to a safe area, avoiding direct contact of workers with hazardous environments. The explosion-proof extended stem butterfly valve we designed for a petrochemical enterprise has an operating handle that extends to a safety zone 3 meters away, ensuring both operational safety and meeting the special requirements of the explosion-proof zone.
The essence of this product's design lies in its precise transmission system. The extended valve stem adopts integral forging technology and is equipped with reinforced rib structure inside to ensure sufficient strength and rigidity even when extended. The transmission gear set is made of wear-resistant alloy material, which has undergone precision machining and special heat treatment. Even with frequent operation, there will be no jamming or wear. The usage records of a certain sewage treatment plant show that after 8 years of continuous use, the switch torque of their extended stem butterfly valve still remains above 90% of the factory level.
