Pneumatic Triple Eccentric Butterfly Valve

HEYUE advanced Pneumatic Triple Eccentric Metal-to-Metal Butterfly Valve - a breakthrough in high-performance flow control technology. Engineered for critical applications where reliability and precision matter most, this valve represents the pinnacle of sealing technology and operational excellence.

Triple Eccentric Design: Incorporating axial, radial, and angular eccentricities to achieve friction-free operation and bidirectional zero-leakage sealing without compromising performance.

I. Industrial Sectors

Power Industry (Thermal Power, Nuclear Power):

Main steam systems, feedwater systems, cooling water systems, flue gas desulfurization (FGD) systems.

High pressure, high temperature (up to 600°C and above), high reliability. Triple Offset Butterfly Valves used to replace traditional gate valves and globe valves, reducing maintenance and enabling automation.

 

Petrochemical and Refining

Process pipelines (catalytic cracking, hydrocracking), oil and gas transportation, storage tank inlets and outlets, flare systems, high-temperature oils and chemical raw materials.

Corrosion resistance, high temperature resistance, fire safety (often equipped with fire-safe design), strict sealing. It is the preferred choice for critical high-temperature and high-pressure pipelines in the plant.

 

Metallurgy and Steel

Blast furnace gas (BFG), coke oven gas (COG), converter gas (LDG) and other gas recovery and transportation systems, hot blast furnace systems, waste heat boilers.

Dust resistance, resistance to corrosive gases, zero leakage to ensure safety, high-frequency operation.

 

Marine and Offshore Engineering

Ship engine room seawater cooling systems, ballast water systems, liquefied natural gas (LNG) carrier cargo handling systems, offshore platform process pipelines.

High reliability, seawater corrosion resistance, compact structure, compliance with classification society specifications (e.g., DNV, ABS, LR).

 

II. Critical Operating Conditions and Special Applications

High Temperature and High Pressure Conditions

Typical media: Superheated steam, hot oil, high-temperature gases.

Triple offset butterfly valve metal-to-metal sealing structure completely overcomes the shortcomings of traditional rubber-sealed butterfly valves in terms of high-temperature resistance.

 

Corrosive and Hazardous Media

Typical media: Acids, alkalis, salt solutions, oil and gas, toxic and harmful chemicals.

The Triple offset butterfly valve seat and disc sealing surfaces can be overlaid with different grades of corrosion-resistant alloys (such as SS316, Hastelloy, Monel) to ensure safety.

 

Applications Requiring Strict Shut-off

Typical scenarios: Material metering, batch processing, safety interlock (ESD) systems, process isolation.

Triple eccentric + conical sealing surface design ensures true bidirectional zero leakage, meeting strict process isolation requirements. Automated Systems Requiring Fast Action

 

Typical scenarios: Emergency shutdown (ESD), process automation control, remote operating stations.

Pneumatic actuators for the triple offset butterfly valve(available with single-acting spring return or double-acting) provide fast, reliable driving force and are easily integrated with DCS/PLC systems, achieving opening and closing in seconds.

 

III. Comparison and Selection Considerations

Compared to ordinary centerline butterfly valves (used in low-pressure water systems) and double-offset high-performance butterfly valves (used for water and wastewater), triple-offset butterfly valves are positioned as high-end industrial valves. They should be prioritized in the following situations:

Medium temperature is consistently > 200°C.

Metal-to-metal sealing and zero leakage are required.

High operating pressure rating (e.g., ANSI 150# or higher).

The medium is corrosive or abrasive.

Integration with an automated control system is required for fast or precise adjustment.