Stainless Steel Worm Gear-Driven Wafer-Type Metal Hard-Sealed Butterfly Valves

The stainless steel D373H worm gear-driven wafer-type metal hard-sealed butterfly valve is an industrial butterfly valve designed for medium-high pressure, high-temperature and complex medium working conditions. Adopting the triple-offset structure of the D373 series, combined with a worm gear transmission mechanism and wafer-type connection, the valve ensures sealing reliability while balancing installation space and operational stability.

The product uses stainless steel (304, 316, 304L, 316L, 2205 duplex stainless steel, etc.) as the main material, and the sealing pair adopts a metal hard-sealed structure, which can adapt to working conditions such as high temperature, particle-containing and corrosive media for a long time. Driven by a worm gear handwheel, it realizes smooth opening/closing and precise adjustment of the valve, and is especially suitable for medium and large-caliber (DN ≥ 200mm) pipeline systems.

In industries such as petrochemicals, electric power, metallurgy, coal chemical industry and water treatment, this Stainless Steel Worm Gear-Driven Wafer-Type Metal Hard-Sealed Butterfly Valves is often used for shut-off or regulation of key pipeline sections, and is particularly suitable for systems with high requirements for safety and stability.

Structural & Design Features

1. Triple-Offset Metal Hard-Sealed Structure

The valve adopts a triple-offset design, which enables the butterfly disc to quickly disengage from the valve seat during opening and closing, reducing friction on the sealing surface:

● Lower opening and closing torque

● Significantly reduced wear on the sealing surface

● Not prone to seizing under high-temperature conditions

The metal-to-metal sealing structure features metal valve seats and butterfly discs, which are precision-machined and lapped to maintain stable sealing performance under high-temperature and high-pressure conditions.

2. Wafer-Type Valve Body Design

The valve body is integrally cast from stainless steel, and the wafer-type connection structure has the following characteristics:

● No independent flange required, compact structure

● Small installation thickness, saving pipeline space

● Compatible with GB/ANSI standard flange systems

● Facilitates renovation and maintenance replacement of existing pipelines

This design can effectively reduce the overall weight and installation cost in medium and large-caliber systems.

3. Worm Gear Transmission Mechanism

Worm gear transmission is one of the core operation methods of the valve, with the following advantages:

● Large transmission ratio, labor-saving operation

● Stable opening and closing process, enabling fine adjustment

● Excellent self-locking performance, reliable positioning

● Suitable for high-frequency regulation and high-torque working conditions

In systems with DN≥200mm or high-pressure conditions, worm gear transmission can significantly improve operational safety and controllability, which is an important reason why this Stainless Steel Worm Gear-Driven Wafer-Type Metal Hard-Sealed Butterfly Valves is widely adopted.

Technical Parameters

Material Configuration Instructions for Stainless Steel

Materials of Main Pressure-Bearing Components

A reasonable material combination can effectively extend the service life of the valve, which is also a key focus in engineering selection.

Applications

This series of valves is mainly used in the following working conditions and industries:

● Petrochemical industry: pipelines for high-temperature oil products and corrosive media

● Power system: main steam and superheated steam systems

● Metallurgical industry: high-temperature flue gas and dust-containing gas

● Coal chemical industry: syngas and sulfur-containing media

● Water treatment: high-temperature water and industrial circulating water

In these scenarios, this Stainless Steel Worm Gear-Driven Wafer-Type Metal Hard-Sealed Butterfly Valves usually undertakes key shut-off or regulation tasks, where high reliability is required.

Selection & Usage Notes

1.Select appropriate stainless steel materials such as 304 / 316 / 2205 according to medium corrosivity.

2.Ensure that bolt strength matches flange thickness for the wafer-type structure.

3.Pay attention to the temperature resistance of the lubricating grease in the worm gear box under high-temperature working conditions.

4.For particle-containing media, prioritize the butterfly disc solution with Stellite alloy overlay welding.

Summary

The stainless steel D373H worm gear-driven wafer-type metal hard-sealed butterfly valve has been optimized in structural design, material configuration and transmission mode for medium-high pressure, high-temperature and complex medium working conditions. Its stable sealing performance, reliable operational characteristics and compact installation method make this Stainless Steel Worm Gear-Driven Wafer-Type Metal Hard-Sealed Butterfly Valves one of the commonly used valve types in pipeline systems across multiple industries.