Check Valve

Axial Flow

An axial check valve is the preferred solution for critical non-return applications such as the protection of rotating equipment and systems where low pressure loss, stable operation and dynamic behaviour are essential.

Specifications

Check Valve - Axial Flow

Size Range

2 - 64 NPS

Body Materials

Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel

Temperature Range

0 °C-200 °C

Trim Materials

Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel

Maximum Allowable Operating Pressure

ASME 150 - 2500 or API 3000 - 10000

Shutoff Rating

Class VI

Disc Materials

Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel

Body Style

RF, BW, RTJ

Flange Drilling

ASME 16.5

Testing Standard

API 6D, API 598

Features:

- Streamlined Flow Path: The valve body has a full-port, streamlined design that minimizes flow restriction and turbulence. This allows for an axial (inline) flow path, reducing pressure loss compared to other check valve designs.
- Disc Design: Utilizes a lightweight disc that travels in a straight line (axial direction) to open and close the flow path. The design minimizes inertia and allows for rapid opening and closing.
- Spring Mechanism: A spring holds the disc in position and helps regulate its movement. The spring tension can be adjusted in some designs to optimize performance for specific flow conditions.
- Silent Operation: The streamlined design and rapid disc movement minimize slamming and noise, making them suitable for quiet operation environments.

Benefits:

- Low Pressure Loss: The streamlined flow path and full-port design minimize resistance to flow, leading to lower pressure drops within the piping system. This translates to improved efficiency and reduced energy consumption.
- Non-Slam Operation: The rapid disc movement and spring mechanism prevent slamming shut, minimizing noise and wear on the valve components. This is particularly beneficial in applications where water hammer (pressure surges) can be a concern.
- Fast Response: The lightweight disc and axial flow path enable rapid opening and closing, making them suitable for applications requiring fast response times.
- Durability: The simple design with minimal moving parts contributes to their durability and reliability.
- Easy Maintenance: The simple design often allows for easy maintenance and inspection procedures.

FAQs:

A. How do axial flow check valves differ from swing check valves?

- Axial Flow: Disc travels in a straight line, streamlined design, minimizes pressure loss.
- Swing Check: Disc swings on a hinge, can experience higher pressure loss and potential for slamming.

B. What are the advantages of non-slam operation?

- Reduces noise and wear on valve components.
- Minimizes the risk of water hammer in the piping system.

C. What factors influence the selection of an axial flow check valve?

- - Flow Rate and Pressure Requirements: The valve needs to be sized appropriately for the expected flow rate and pressure in the system.
  - Fluid Compatibility: The valve materials must be compatible with the fluid being controlled.
  - Noise Considerations: If quiet operation is crucial, an axial flow check valve is a good choice.

D. What are the maintenance requirements for axial flow check valves?

- They typically require minimal maintenance. Periodic inspection is recommended to ensure proper operation, identify wear, and potentially replace the spring or disc if necessary.