Overview

The H61H Self-Sealing Forged Steel Check Valve is an automatic valve featuring a pressure-self-tightening bonnet seal design and a full-bore, butt-weld end connection. It relies on the energy of the flowing medium to drive the disc in an automatic opening and closing motion along the valve's centerline, thereby achieving unidirectional flow and preventing backflow in the piping system. Its core design utilizes a compact, straight-through flow path structure that ensures smooth media flow while minimizing turbulence and pressure loss. The valve body is formed through a precision forging process using high-quality materials such as carbon steel, alloy steel, or stainless steel, guaranteeing excellent impact resistance and structural integrity under high-temperature, high-pressure, and cyclic stress conditions. Key components are manufactured with precision machining techniques and feature a metal-to-metal hard sealing design. Combined with the self-sealing bonnet structure, which uses the system pressure to energize a seal ring, it achieves a reliable seal between the bonnet and the body – the higher the pressure, the tighter the seal, completely eliminating potential external leakage. The valve utilizes a butt-weld connection method, where the valve ends are prepared with bevels and directly welded to the mating pipes, making it ideal for critical industrial piping systems involving high pressure, high temperature, corrosive media, and applications where leakage is impermissible. The valve opens automatically under the forward thrust of the medium and closes automatically by the disc's own weight and reverse pressure when the flow stops or reverses, providing a reliable unidirectional shut-off function. This valve is specifically designed for industrial fluid conveyance systems involving water, steam, oil, and corrosive media. It is particularly suitable for demanding applications in petroleum, chemical, power, metallurgy, district heating, and long-distance pipelines that require high reliability, maintenance-free operation, and long-term stable performance under high temperature, high pressure, corrosive, or erosive conditions.

H61H Self-Sealing Forged Steel Check Valve Product Image

Features

1、High-Performance Forged Body Construction: The valve body is formed through an integral forging process using high-quality carbon steel, stainless steel, or alloy steel. This eliminates casting defects, significantly enhances material density and strength, ensuring long-term stable operation under high pressure, high temperature, and demanding conditions, and completely avoids the risk of pressure-containing part failure.

2、Pressure Self-Tightening Seal System: A pressure self-tightening seal structure is employed between the bonnet and the body. It utilizes the system pressure to energize a seal ring, achieving a reliable seal between the bonnet and body – the higher the pressure, the tighter the seal. This design completely eliminates the potential for leakage caused by thermal expansion and contraction inherent in traditional bolted flange connections, making it particularly suitable for demanding conditions involving high temperature, high pressure, and frequent pressure fluctuations.

3、High-Strength Butt-Weld Connection: It features a standard butt-weld end design. The valve ends are prepared with bevels and directly welded to the mating pipes, creating a permanent, high-strength fused connection. This completely eliminates potential leak paths associated with traditional threaded or flanged connections, making it particularly suitable for critical applications involving high pressure, high temperature, and where leakage is impermissible.

4、Low Flow Resistance Full-Bore Flow Path Design: The internal flow path features a straight-through, full-bore design. This results in a short, smooth media flow path, effectively reducing fluid resistance losses and pressure drop. The smooth transitions in the flow path avoid turbulence and media stagnation, making it suitable for various industrial fluids including water, steam, oil, and corrosive media.

5、Wide Applicability Across Operating Conditions: The product design covers pressure classes from Class 150 to Class 2500 and a wide temperature range. It meets the piping control requirements of diverse industries such as petroleum, chemical, power, metallurgy, pharmaceutical, and general industrial applications.

6、Flexible Installation and Layout: As an automatic valve, it requires no external power source or manual operation. It relies entirely on the energy of the flowing medium to open and close, providing sensitive response and reliable action. It can be installed in either horizontal or vertical positions, offering installation flexibility to suit different piping layout requirements.

H61H Self-Sealing Forged Steel Check Valve Structure Diagram

Parts Name

Performance Specification Table

H61H Self-Sealing Forged Steel Check Valve Dimension Diagram

H61H Self-Sealing Forged Steel Check Valve Dimension Table