Worm Gear Drive Flange Type Metal Hard Seal Butterfly Valves

The stainless steel D343H worm gear-operated flange-type metal hard-seal butterfly valve is an industrial-grade butterfly valve developed for high-temperature, high-pressure, and complex media conditions. Featuring a triple-offset design, flange connection, and worm gear actuator, it achieves reliable sealing while maintaining low operating torque and stable throttling performance.

As a worm gear drive flange type metal hard seal butterfly valves, its pressure-containing components are primarily made of stainless steel, combined with a metal hard-seal structure. This ensures stable sealing performance and structural strength even under long-term high-temperature operation, particle erosion, and frequent cycling, making it suitable for industrial systems with high safety and durability requirements.

Structural Design and Working Principle

Triple-Offset Design

The valve incorporates axial, radial, and angular offsets, allowing the disc to quickly disengage from the seat during operation. This avoids sliding friction between metal sealing surfaces, significantly reducing wear and extending service life.At the final closing stage, the eccentric geometry creates reliable metal-to-metal compression for stable sealing.

Worm Gear Actuation

The worm gear drive provides a large reduction ratio, substantially lowering manual operating torque—especially suitable for large-diameter and high-pressure-differential applications.It also offers self-locking capability, preventing valve position reversal during system pressure fluctuations and enhancing operational safety.For flow control applications, the worm gear enables smooth and precise angular adjustment.

Flange Connection

Both ends of the valve feature flange connections compliant with GB/T 9113 or ANSI B16.5. This ensures high connection strength, reliable sealing, and easy installation, removal, and maintenance, making it ideal for long-term operation in fixed piping systems.

Key Product Features

All-stainless steel pressure-containing structure provides excellent corrosion resistance and high-temperature strength

Metal hard-seal design suitable for high temperature, high pressure, and particle-laden media

Worm gear drive ensures smooth operation, ideal for large-diameter and high-torque applications

Triple-offset structure reduces wear and extends seal life

Standardized flange connection offers strong system compatibility

This worm gear drive flange type metal hard seal butterfly valves demonstrates clear advantages in reliability, maintainability, and long-term operational cost.

Typical Applications

In these demanding environments, the worm gear drive flange type metal hard seal butterfly valves delivers long-term stable performance and helps reduce unplanned downtime.

Core Technical Parameters (Summary)

Selection and Usage Recommendations

During selection, factors such as media properties, system pressure, operating temperature, and cycling frequency should be carefully evaluated.For abrasive or particle-laden media, Stellite-welded seal pairs are recommended. For highly corrosive environments, 316L or duplex stainless steel materials are preferred.

Proper selection and standardized maintenance will significantly enhance the operational stability and service life of the worm gear drive flange type metal hard seal butterfly valves.

Conclusion

The stainless steel D343H worm gear-operated flange-type metal hard-seal butterfly valve is built on mature structural design, stable material configuration, and reliable actuation.Its comprehensive performance in safety, durability, and adaptability makes it a commonly used solution for high-temperature and high-pressure butterfly valve applications.