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What are the two structural forms of butterfly valves?

Release time:

2025-07-23 10:50:04

As a key component of fluid control systems, butterfly valves are widely used in energy, chemical, water and other fields due to their compact structure and fast opening and closing advantages. To assist users in accurately matching their working conditions and requirements, let's delve into the two core structural forms of butterfly valves together——Medium line typegiveBipartite heart typeReveal its design logic and application scenarios.

1、 Mid line butterfly valve: an economical and reliable universal choice

▶ Structural features:
The axis of the valve stem, the center of the butterfly plate, and the center of the pipeline coincide, with a symmetrical butterfly plate design.
▶ Core advantages:
✅ High sealing performanceRubber/elastic valve seat compression achieves zero leakage
✅ Low operating torqueLightweight opening and closing, saving energy consumption
✅ cost optimizationSimple structure and easy maintenance
⭕ Typical scenario:
Building HVAC (Heating, Ventilation, and Air Conditioning)
› Municipal water supply and drainage system
Low pressure, room temperature clean medium working conditions

2、 Double eccentric butterfly valve: performance under harsh working conditions

▶ Technological breakthrough:
Adopting a dual eccentric structure:
① The valve stem deviates from the center of the butterfly plate
② The valve stem deviates from the center of the pipeline
▶ Performance leap:
🔥 long lifeInstantly detach from the valve seat during opening and closing, reducing wear by 90%
🔥 Hard sealing guaranteeMetal valve seat can withstand high temperature and high pressure (up to 600 ℃/Class 600)
🔥 Corrosion resistant designAdapt to particles and corrosive media
⭕ Strict application areas:
› Petrochemical pipelines
Main steam control of power system
› Metallurgical blast furnace cooling system