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FAQs: Advanced Air Knife

Below is a list of Frequently Asked Questions relating to our Regular Air Knife. If you need additional help with your application and/or can't find an answer to your question, please call our factory at 1-705-770-4455 or email an Application Engineer at support@stream-tek.com.

      1. Will the Air Knife operate with a blower?
      No. The Air Knife is designed to use only compressed air. Blowers are very noisy, large, and expensive with 3" to 6" connections. They simply will not produce enough force to operate our Air Knife.
      2. Can I cut the Air Knife to a custom length?
      No. The Air Knife is precision machined, cutting it would expose the internal design with no way to reseal the air knife. With that said, custom sizes can be machined upon special request.
      3. Can I connect the cold end of a Vortex Tube to an Air Knife?
      No. This would cause an airflow restriction which would instantly produce back-pressure in excess of 5 PSIG! When this back-pressure is exceeded, performance of the Vortex Tube will be negatively impacted. The hot end of the Vortex Tube on the other hand can withstand a pressure up to 30 PSIG (depending on the cold fraction).
      4. What is the recommended pressure that should be used with the Air Knife?
      Always try to use the lowest pressure that is possible for your application. Always use a pressure regulator to increase force/airflow to the point where your application problem is rectified. The maximum pressure of the Air Knife is 250 PSIG.
      5. How do I mount the Air Knife?
      Rigid compressed air pipe is the best way to mount the Regular Air Knife. If this is not possible, there are multiple 1/4-20 mounting holes located on the back of the Air Knife.
      6. Can you make Regular Air Knives over 54" or other lengths you do not stock?
      Yes. We have the capabilities to manufacture up to 109" long Air Knives. In addition, any length air knife can be machined upon special request. Lead time for custom orders is typically 2-3 weeks.
      7. What temperatures can your Air Knives withstand?

      Aluminum Air Knife:
      275ºF (135ºC)

      Stainless Steel (Type 303) Air Knife:
      400ºF (204ºC)

      Stainless Steel (Type 316) Air Knife:
      800ºF (427ºC)

      * Temperatures that exceed 800ºF (427ºC) could produce intergranular corrosion which could eventually plug the air gap opening