G-250 Vacuum Tube Testing Tool

Provides a fast and effective way to seal off and evacuate individual heat exchanger tubes to test the tube for leakage, for tubes such as:

  • Pneumatically Testing Heat Exchanger Tubes
  • Tube-to-Tubesheet Joints for Leaks


G-250 Vacuum Tube Testing Guns are designed to quickly seal off and evacuate individual heat exchanger and vacuum tubes to test the tube for leakage. 

To operate the G-250 Vacuum Tube Testing Tool:

  1. Connect the standard plant air supply to the active vacuum gun and insert the conical seal into the end of the tube to be tested. 
  2. Insert the passive plugging tool into the opposite end of the tube. 
  3. Depress the air control valve, air flows through the vacuum generator and evacuates the tube.
  4. Release the air control valve and any loss of vacuum indicated on the vacuum gauge identifies a leaking tube.

An optional digital vacuum gauge increases the operator’s ability to detect even the smallest pinhole leaks.

Specify the following information when ordering:

  • Tube OD and wall thickness
  • Tube length, tubesheet face-to-face dimension
  • Number of tubes to be tested
  • Length or depth of any channel head or header box present


  • Plant air supply between 40 and 125 psi (2.7 to 8.6Bar)
  • Air supply flow rate greater than 5 SCFM (2.36lps) 

Features & Benefits

  • Two sizes of seals: The G-250 Set is supplied with two sizes of interchangeable conical neoprene Seal and Washer Sets and a compact toolbox.
  • Tube sizes for testing: The Seals and Washer Sets allow the G-250 to be utilized to test heat exchanger tubes ranging from 0.28" to 1.45" (7.1mm to 36.8mm) ID.
  • High strength allow: The G-250 Gun are machined form high strength aluminum alloy reducing the fatigue associated with heavier testing equipment.
  • Light Weight: Each G-250 Set weighs less than 2.5 lbs (1.1kg). 




At Curtiss Wright, you’ll find a variety of different products such as speciality tools, POP-A-PLUG ® Tube Plugging Systems, hydrostatic tests and isolation plugs.


These tools and systems are used in all industry segments. To find out more, read the related documents to find further information in product guides, application and instruction sheets and also view animations and videos on products.