Overview
The EST G-150 tube testing gun is a pneumatic pressure-testing kit engineered for rapid detection of pinhole leaks in heat exchanger tubes. Manufactured by EST Group (now part of Curtiss-Wright), the G-150 combines an air injection gun and a plugging gun to pressurize individual tubes or entire tube bundles using standard plant air. This used unit is fully functional and ready for deployment in industrial maintenance and inspection operations.
Key Features
- Complete two-gun kit: Includes one G-150 Air Injection Gun and one G-150 Tube Plugging Gun.
- Pneumatic operation: Operates using standard plant air supplies from 40 to 125 psi (2.7–8.6 bar)
- Interchangeable seal sets: Interchangeable Seal and Washer Sets allow testing of tube sizes from 0.280″ to 1.230″ (7.11mm to 31.24mm) I.D.
- Lightweight design: Air Injection Gun and Plugging Guns weigh less than 2.1 lbs. (1 kg) apiece
- Simple operation: Insert both guns into the tube end, press the air control valve button to expand seals and pressurize the tube, then release the valve and monitor the pressure gauge to reveal even the smallest tube leak.
Technical Specifications
- Model: G-150
- Gun Type: Air Injection & Plugging Pair
- Operating Pressure: 40–125 psi (2.7–8.6 bar)
- Tube I.D. Range: 0.280″ – 1.230″ (7.11mm – 31.24mm)
- Weight per Gun: Less than 2.1 lbs (1 kg)
- Seal Material: Interchangeable neoprene/conical
- Air Source: Standard plant compressed air
- Gauge Type: Pressure dial gauge
- Material: High-strength aluminum alloy
Typical Applications
- Heat exchanger tube bundle testing
- Pinhole leak detection in industrial condensers and coolers
- Boiler tube inspection
- Tube-to-tubesheet joint evaluation
- Preventive maintenance and equipment diagnostics
- Rapid identification of degraded tubes before plugging or replacement
Compatibility & Replacements
Compatible With
- Standard industrial plant compressed air systems (40–125 psi)
- Heat exchangers with tubes 0.28″ to 1.23″ I.D. (standard G-150)
- Boiler and condenser tube bundles
- EST replacement seal and washer kits (sized by tube I.D.)
- Air cooled heat exchanger (ACHE) applications with ACHE-compatible backup washers
Replaces / Drop-In Replacement For
- Earlier EST G-150 tube testing gun sets
- Direct replacement within G-150 series line
- Compatible with G-150 spare seal and washer sets from EST Group
Works With
- EST Group Pop-A-Plug® tube plugging system
- EST replacement seal and washer sets (order by tube I.D.)
- EST extended support tubes (ACHE applications)
- Standard pressure gauges and air control valve systems
- Industrial compressed air distribution networks
