Check Valves Flanged END

A check valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem.

Special Features:

• Long service life
• Easy handling and maintenance
• Respect to emission standards
• Compact design of valves flexibly accommodates various types of flange selection
• Valve can mount any direction

Applications

1. Power plants
2. Chemical industry
3. Petrochemical industry
4. Compressed air, gases and vacuum lines
5. Refineries
6. Water Supply and others

Design

• Casted body and cover
• Bolted cover
• Anti-blowout design

Constructional Features

Body

The body is the main pressure containing structure of the valve and the most easily identified as it forms the mass of the valve. It contains all of the valve's internal parts that will come in contact with the substance being controlled by the valve.

Disc

The disc provides a leak proof closure for the valve body. The disc can rotate on its axis and thereby prevented the local wear.

Yoke

Yoke is connected with valve body and disc through bolted. Yoke is typically of the balanced with the valve body.

Seat ring

Integral or welded with valve body

Technical Specification

Design and Manufacturing Standard

• BS 1868

Testing Standard

• API 598

Size range

• 50mm to 600mm

Operation

Non slam check valves are opened by the pressure of the fluid and closed by the spring as soon as flow ceases and before reverse flow occurs.