Flanged triple eccentric butterfly valve for manual or electric actuator Pn 16

Steel flanged triple eccentric butterfly valves with stainless steel sealing PN 16, equipped with a manual actuator, are devices designed to shut off or regulate flow of the working medium in pipelines. Triple eccentricity is achieved through the following features:

1. First eccentricity: Axis of rotation is offset relative to the center of the disc's sealing surface.
2. Second eccentricity: Axis of rotation is tilted from the central axis of the pipeline.
3. Third eccentricity: Conical shape of the disc ensures its displacement along a spheroid during rotation, eliminating contact between the sealing surfaces during opening/closing.

This design allows:

• Elimination of friction between the disc and the seat.
• Reduction of seal wear.
• Ensuring Class "A" tightness in both flow directions.

Advantages of triple eccentric flanged butterfly valves

1. Durability: Minimization of friction increases the mechanism's service life.
2. Low torque: Less effort is required to operate the valve due to reduced resistance during disc movement.
3. Bidirectional tightness: The valve ensures complete shut-off of flow in both directions without leakage.
4. Compactness and ease of installation: Small dimensions allow installation even in limited spaces without the need for large equipment.
5. Cost-effective maintenance: The modular design facilitates the replacement of sealing elements both on-site and in repair workshops.

Areas of application

Triple eccentric flanged butterfly valves are used in various industries where high reliability and safety requirements are imposed:

• Oil production and refining
• Gas production and processing
• Chemical industry
• Metallurgy
• Thermal power engineering