Definition of High-Temperature and High-Pressure Needle Valve

The high-temperature and high-pressure needle valve is a special precision control valve designed for extreme industrial working conditions, mainly used in key fields including chemical engineering, electric power and petroleum. It adopts a professional tapered sealing structure and is manufactured with high-temperature resistant alloy materials, delivering exceptional performance under harsh temperature and pressure environments.

This valve boasts a maximum operating pressure of up to 689 bar, with a wide temperature resistance range from -54℃ to 649℃, adapting to both ultra-low temperature and ultra-high temperature working scenarios. It supports diversified connection types including welded type and ferrule type, and can be equipped with manual, pneumatic or electric actuators to meet different control demands. It realizes reliable medium isolation and stable flow control through the specialized non-rotating valve tips design and dual sealing structure, ensuring zero leakage under high-temperature and high-pressure conditions.

Structural Features of High-Temperature and High-Pressure Needle Valve

• Stable Hexagonal Valve Body: Adopts a heavy-duty hexagonal valve body structure, equipped with a non-rotating valve tip and an isolated valve stem thread lubrication system, avoiding medium contamination and improving operation stability.

• High-Temperature Resistant Stem Seal: The valve stem is fitted with flexible graphite packing, which greatly enhances sealing durability and high-temperature resistance, suitable for long-term operation under extreme temperatures.

• Dual-Adjustment Control Structure: Features a professional dual-adjustment structure, including a top adjusting screw and a bottom V-shaped slide plate mechanical linkage device, realizing efficient dual sealing control via a push rod spring.

• Heat Dissipation Design: An annular heat sink is specially added to the packing box seat, effectively reducing the valve body surface temperature under high-temperature working conditions, protecting internal components and extending service life.

Technical Parameters of High-Temperature and High-Pressure Needle Valve

Application Fields of High-Temperature and High-Pressure Needle Valve

The high-temperature and high-pressure needle valve is widely used in thermal power plants, electric power engineering, electrical engineering, mechanical and electrical equipment engineering, and electric control equipment engineering. It stands out with obvious advantages including easy installation, reasonable structural design, cost-effectiveness and simple operation, making it a preferred shut-off and regulation mechanism for high-temperature and high-pressure pipelines.

It is specially suitable for on-off and flow control in high-temperature and high-pressure pipelines, such as primary and secondary steam valves of thermal power plants, and various high-temperature chemical pipelines. The valve body is forged from high-strength carbon steel, stainless steel (1Cr18Ni9Ti) or heat-resistant alloy steel, and the sealing surface is formed by hard alloy surfacing welding, ensuring excellent wear resistance, high-temperature resistance and long service life in harsh working conditions.