Definition of High-Temperature and High-Pressure Check Valve

The high-temperature and high-pressure check valve is suitable for use as a device to prevent medium backflow in pipelines carrying high-temperature and high-pressure water, steam, oil products, and superheated steam in fields such as thermal power plants, petrochemical industry, and metallurgy industry. Its middle part adopts a valve coverless pressure self-sealing structure, which provides excellent sealing performance under high-temperature and high-pressure working conditions. There are two types of materials for the self-sealing rings: one is low-carbon steel, and the other is flexible graphite with 316 stainless steel wires (mesh). The sealing surface is formed by overlay welding of cobalt-based cemented carbide. The pure metal layer after processing is ≥ 3mm, featuring wear resistance, high-temperature resistance, corrosion resistance, scratch resistance, and long service life.

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

Product Name: High-Temperature and High-Pressure Check Valve

Nominal Diameter: DN10 ~ DN700

Structure Type: Swing type, Lift type

Nominal Pressure: 16.0MPa ~ 42.0MPa

Connection Method: Welding, Flange

Applicable Temperature: -29ºC ~ +550ºC

Actuation Method: Medium-driven

Valve Body Material: Stainless steel

Standards: National standard GB, German standard DIN, American standards API, ANSI

Applicable Medium: Water, oil, steam

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

Reasonable structure, excellent performance, and aesthetic appearance.

The valve cavity adopts a pressure self-sealing structure; the higher the medium pressure, the better the sealing performance.

Both ends of the branch pipe are equipped with butt welding connections, adapting to different pipe connection requirements.

The sealing surfaces of the valve disc and valve seat are formed by overlay welding of Stellite cobalt-based cemented carbide, featuring wear resistance, high-temperature resistance, good scratch resistance, and long service life.

High-temperature and pressure-resistant components are made of high-quality heat-resistant alloy steel, ensuring safety, reliability, stable performance, and long service life.

Selection Reference of High-Temperature and High-Pressure Check Valve

Pressure: Determine the operating pressure and pressure resistance level

Medium: Identify the fluid medium

Cracking pressure: Minimum cracking pressure

Sealing method selection: Soft sealing or hard sealing

Connection specification: Standard for internal thread connection

Material details: Valve body material and sealing material

Additional functions: Select models with pressure gauge interface, anti-cavitation structure or detachable valve cover according to requirements, to facilitate system maintenance and pressure monitoring