The triple eccentric butterfly valve is mainly used in the following key areas due to its unique sealing structure (triple eccentric design of valve stem, butterfly plate and valve body) and excellent high pressure resistance, high temperature resistance and zero leakage characteristics:
1. High temperature and high pressure industrial system
Energy and power
The main steam pipeline of thermal power plant boiler (temperature resistance ≤550℃) and flue gas desulfurization system are used to regulate the high temperature flue gas flow.
Large diameter pipelines (DN200 and above) of nuclear power cooling water system use their low flow resistance characteristics to reduce pump energy consumption.
Petrochemical
High temperature oil pipelines (such as residual oil and heavy oil) and reaction gas pipelines of cracking units in refineries are suitable for Class 600~2500 high pressure conditions.
Acid and alkali medium transmission pipelines (such as sulfuric acid and caustic soda) rely on the corrosion resistance of metal hard seals.
2. Strict sealing requirements
Gas and combustible gases
Steel plant blast furnace gas recovery pipeline, natural gas long-distance pipeline, achieve two-way pressure zero leakage (API 598 Class V/VI).
Chemical process control
Emergency shut-off valves for toxic and harmful media (such as chlorine and ammonia) rely on spring force booster mechanism to close quickly.
Pressure swing adsorption (PSA) gas separation device, replaces gate valve/stop valve as program control valve.
3. High-flow infrastructure
Water conservancy and municipal
Large water plant main water supply network (DN≥300), low flow resistance design reduces water transportation energy consumption.
Sewage treatment plant sludge transportation pipeline, anti-particulate medium scouring and wear.
Industrial fluid transportation
Ship ballast water system, offshore platform seawater pipeline, suitable for impurity-containing media.
4. Prohibited scenarios
Small-diameter pipelines (DN＜200): The thickness of the butterfly plate causes excessive flow resistance, affecting the flow efficiency of the medium. Long-term fully open condition: The medium continuously flushes the metal valve seat, which may shorten the seal life
