High-Pressure Flanged Check Valves

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Product Detail

High-Pressure Flanged Check Valve: Definition, Features, Parameters & Structural Advantages

1. Definition

The High-Pressure Flanged Check Valve is a specialized backflow prevention device designed for high-pressure industrial pipelines. It is widely used in petroleum, chemical, thermal power and other harsh working conditions, with a pressure rating of Class 1500～2500Lb and an operating temperature range of -29～570℃. It effectively prevents the reverse flow of high-pressure media such as water, steam and oil products, ensuring the safe and stable operation of pipeline systems.

2. Technical Parameters

Parameter Category	Details
Nominal Diameter	DN15 - 3000; 1/4 - 100 inches
Pressure Rating	PN100 - PN320; Class 150LB - 2500LB
Temperature Range	-196℃ - 550℃
Body Material	Forged steel, stainless steel, chromium-molybdenum steel
Sealing Surface Material	Chromium stainless steel (overlay welded), cemented carbide (overlay welded), chromium-nickel-titanium stainless steel
Gasket Type	Graphite-spiral wound with steel strip; PTFE (Polytetrafluoroethylene)
Connection Method	Flange, thread, welding
Applicable Media	Water, steam, oil products, etc.

3. Structural Features

Compact & Reliable: Features a compact and reasonable structural design, ensuring reliable sealing and excellent overall performance in high-pressure environments.
Lightweight & Efficient: Small volume and light weight make it easy to install and maintain, with minimal fluid resistance due to an unobstructed flow passage.
Sensitive & Stable Operation: The disc closes quickly and sensitively, while the rotating pin shaft structure (outside the valve seat) reduces violent impact during closing, minimizing water hammer effects.
Diverse Connection: Supports flange, thread and welding connection methods, adapting to different pipeline installation requirements.

4. Product Core Features

Compliant Standards: Manufactured in accordance with ANSI B16.34 and E101 standards, ensuring compatibility with imported equipment and meeting international quality requirements.
Pressure Self-Sealing Cavity: The valve cavity adopts a pressure self-sealing structure—sealing performance improves as internal cavity pressure increases, providing reliable protection under extreme high-pressure conditions.
High-Strength Components: Pressure-resistant parts are made of high-quality heat-resistant alloy steel, offering excellent high-temperature resistance, high pressure-bearing capacity and long service life.
Durable Sealing Surfaces: The disc and valve seat sealing surfaces are overlaid with Stellite (cobalt-based) cemented carbide, delivering superior wear resistance, high-temperature resistance and scratch resistance.
Leakage Reduction: Built-in pin shaft structure reduces external leakage points, ensuring more reliable and leak-proof operation for long-term use.

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