High Temperature Butterfly Valves

Specification

Hard Seal Flange High-Temperature Butterfly Valve for Water

In industrial scenarios such as petrochemical, power energy, and metallurgy that involve high temperatures and pressures, valves face strict requirements for sealing performance, heat resistance, and structural strength. The Newway stainless steel high-temperature & high-pressure resistant multi-level metal hard sealing butterfly valve, with its innovative design and exquisite craftsmanship, becomes a reliable choice for complex working conditions, providing efficient and safe solutions for industrial fluid control.

I. Analysis of Core Product Features

(A) Multi-Level Metal Hard Sealing Structure

Our butterfly valve adopts a unique multi-level metal hard sealing design, composed of a disc, seat, and multiple layers of metal sealing pairs. The seat uses Stellite alloy surfacing technology, with a surface hardness of up to HRC60, offering excellent erosion and wear resistance. The disc and seat are precisely matched through a conical surface, forming a multi-level sealing line that achieves zero leakage under high temperature and pressure. Tested at PN40 pressure and 425℃, the leakage rate is below 1×10⁻⁹ m³/s, meeting the API 598 Class VI sealing standard, suitable for controlling flammable, explosive, and highly corrosive media.

(B) High-Temperature & High-Pressure Resistant Material System

(C) Double Eccentric + Conical Sealing Design

Combining the double eccentric structure with a conical sealing surface, the disc disengages from the seat instantly during opening, reducing friction and wear. During closing, the conical sealing surface gradually fits as the angle changes, forming a self-tightening seal—the higher the pressure, the better the sealing effect. This design reduces the opening/closing torque by 30% and avoids jamming caused by high-temperature expansion, ensuring long-term stable operation.

II. Key Technical Attributes