Manual and Automatic Variable Inlet Vane Dampers

Air Systems offers manual and automatic Variable Inlet Vane (VIV) dampers for fan inlet and volume control applications. Every VIV is custom designed and built to bolt directly to a specific fan manufacturer’s inlet flange.

Our VIV dampers offer distinct advantages:

  • Imperial and metric sizes available
  • Quick drawings and delivery – expedited delivery available
  • Available in Mild Steel and Stainless Steel construction
  • Custom coatings available – Enamel, Epoxy or Powder
  • Automatic operation by electric, pneumatic or hydraulic actuator (2-position or modulating available)

Air Systems offers VIV dampers that are built specifically for each order and typically shipped within 3-5 weeks, depending on actuator lead time. Our team is highly skilled in the development of successful VIV applications with over 20 years of experience.

  • Help Me Choose
  • FAQ
  • Manufacturers
  • Applications

Help me choose the best VIV dampers for my application

To start, please give us a few details about your application and we will respond within the hour to discuss options.

  • This field is for validation purposes and should be left unchanged.

QUESTION: What materials are available for the construction of my VIV dampers?
ANSWER: Galvanized, aluminized, galvanneal, or stainless steel.


QUESTION: How do I choose what material to use for my application?
ANSWER: The type of airstream and the temperature will determine the best material for the application. Our experienced sales staff will assist in selecting the proper damper design and material selection during the proposal process.


QUESTION: What is the lead time on your VIV dampers?
ANSWER: Leadtime is typically 3-5 weeks.


QUESTION: What is the expected Turn Down I can expect from your VIV?
ANSWER: 4 to 1 on volume turn down while maintaining same peak static pressure.


QUESTION: Can you provide a custom bolt hole pattern in the VIV flange?
ANSWER: Yes, we can provide any fan manufacturers flange size and bolt pattern.


QUESTION: What information do I need to provide to receive a proposal?
ANSWER: We need to know your diameter, airflow (CFM) , max fan static pressure, type of airstream, and the normal and design operating temperatures.

Industrial Metal Fabricators (IMF)

Air Systems partners with the IMF team to develop VIV damper solutions to meet specific customer needs.

  • Fan inlet volume control