Free Forged Check Valve

Hanno Valve manufactures the Free Forged Check Valve in China for demanding industrial applications. This swing type check valve is manufactured with Inconel 600 material and designed for oxygen service. All valve parts undergo strict degreasing treatment before delivery.

Swing Check Valve Design for One-Way Flow

A check valve is an automatic valve that allows fluid to flow in one direction and prevents reverse flow.

This Free Forged Check Valve uses a swing type disc. The disc moves with the direction of the medium and closes when reverse flow occurs, helping prevent backflow in the pipeline.

The valve is suitable for applications where reverse flow protection is required for pipelines and connected equipment.

Free Forging and Inconel 600 Material

This valve is manufactured using free forging technology. Compared with a conventional cast structure, the forging process can provide improved mechanical properties and a refined grain structure.

The valve uses Inconel 600, a nickel-chromium alloy used for applications requiring corrosion resistance and high-temperature performance.

According to the supplied technical requirements, the material is also subject to requirements for chemical composition, heat treatment, and metallographic structure.

Designed for Oxygen Service

Oxygen service places particular importance on the cleanliness of valve components.

For this application, all parts of the valve undergo strict degreasing treatment. The degreasing process is an important part of preparing the valve for oxygen service.

The supplied technical requirements also specify cleanliness-related requirements for the valve and its components.

Technical Specifications

1. Bill of Materials (BOM)

2. Dimensional Specifications

Applicable Standards

The valve is designed and tested according to the standards specified in the supplied technical documentation.

API 594

API 594 is specified as the design standard for this check valve.

API 598

API 598 is specified for valve inspection and pressure testing. The supplied drawing specifies a shell test pressure of 154 bar, a seat test pressure of 113 bar, and a low-pressure seal test of 6 bar.

ASME B16.5

The flange dimensions and connection requirements follow ASME B16.5 as specified in the technical documentation.

ASME B16.10

The face-to-face dimension is designed according to ASME B16.10.

Inspection and Quality Requirements

Hanno Valve's supplied technical requirements specify inspection requirements covering material, pressure-containing parts, valve body components, and final testing.

The requirements include:

Chemical composition control for the specified material

Heat treatment according to applicable ASTM and EN requirements

Metallographic inspection according to ASTM E381

100% UT and PT inspection for specified pressure-containing parts

100% RT inspection for specified cast valve components

Pressure testing according to the specified API 598 requirements

Anti-static performance requirements

Strict degreasing treatment for oxygen service

For anti-static performance, the technical requirements specify a grounding resistance of less than 10 Ω and a flange-to-flange resistance of less than 0.03 Ω.

Manufacturing Details

The technical drawing specifies a 5-inch valve with a nominal diameter of 127 mm and a face-to-face dimension of 511 mm.

The supplied technical requirements also specify the applicable temperature range as -29°C to 538°C.

These dimensional and technical requirements provide a reference for engineering selection, pipeline installation, and inspection.

About Hanno Valve

Hanno Valve is the valve brand of Zhejiang Hengnuo Valve Manufacturing Co., Ltd.

Hengnuo has more than 25 years of valve manufacturing experience and is located in the Bihu Valve Industry Area of Lishui, Zhejiang, China. The company has a production area of approximately 18,000㎡ and more than 150 employees, including over 32 senior technicians.

The company's main products include:

Gate Valves

Check Valves

Globe Valves

Power Station Valves

Hengnuo also operates its own foundry. The foundry uses precoated sand technology to produce castings for the company's valve manufacturing operations.

Hanno Valve Manufacturing Capacity

Frequently Asked Questions

What type of check valve is this?

This is a swing type check valve. The valve uses a swing disc to allow flow in one direction and prevent reverse flow.

What material is used for this Free Forged Check Valve?

The valve is manufactured with Inconel 600 material.

Is this valve designed for oxygen service?

Yes. The supplied product information specifies the valve for oxygen service, and all valve parts undergo strict degreasing treatment.

Which standards are specified for the valve?

The supplied technical documentation specifies API 594, API 598, ASME B16.5, and ASME B16.10.

What is the applicable temperature range?

The specified applicable temperature range is -29°C to 538°C.

What is the size shown in the technical drawing?

The supplied drawing shows a 5-inch valve, with a nominal diameter of 127 mm and a face-to-face dimension of 511 mm.