Cart 0
Armstrong International AI series in-line float & thermostatic steam trap with integral vacuum breaker. 1/2" D501280-VB 15 PISG, 1/2" D503339-VB 30 PSIG, 1/2" D500567-VB 75 PSIG, 1/2" D500446-VB 125 PSIG, 1/2" D15769-VB 175 PSIG, 3/4" D527772-VB 15 PSIG, 3/4" D500137-VB 30 PSIG, 3/4" D501343-VB 75 PSIG, 3/4" D17140-VB 125 PSIG, 3/4" D501576-VB 175 PSIG, 1" D501830-VB 15 PSIG, 1" D501988-VB 30 PSIG, 1" D500434-VB 75 PSIG, 1" D500447-VB 125 PSIG, 1" D500499-VB 175 PSIG.

Armstrong AI-VB Series In-Line Float & Thermostatic Steam Trap With Integral Vacuum Breaker

Only 0 left!

The Armstrong AI series float & thermostatic steam trap with integral vacuum breaker and in-line configuration is applicable to all types of steam heating and steam process equipment. An alternate inlet is provided for flexibility of installation. 

  • Available in sizes 1/2", 3/4", and 1"
  • Available in pressure ratings 15 PSI, 30 PSI, 75 PSI, 125 PSI, 175 PSI
  • Stainless steel internal components
  • Balanced pressure phospho-bronze thermostatic bellows
  • Optional integral vacuum breaker to break vacuum and permit flow of condensate in modular steam flow applications
  • Armstrong AI Series Float & Thermostatic Steam Trap Technical Specifications


We Also Recommend

Armstrong International series 800 inverted bucket steam trap. 1/2" C5297-1 20 PSIG, 1/2" C5297-2 80 PSIG, 1/2" C5297-3 125 PSIG, 1/2" C5297-4 150 PSIG.

Armstrong 800 Inverted Bucket Steam Trap
Armstrong International series 800 inverted bucket steam trap with thermic vent. 1/2" C5297-1T 20 PSIG, 1/2" C5297-2T 80 PSIG, 1/2" C5297-3T 125 PSIG, 1/2" C5297-4T 150 PSIG.

Armstrong 800 Inverted Bucket Steam Trap With Thermic Vent
Armstrong International series 800 inverted bucket steam trap with internal check valve. 1/2" C5297-1CV 20 PSIG, 1/2" C5297-2CV 80 PSIG, 1/2" C5297-3CV 125 PSIG, 1/2" C5297-4CV 150 PSIG.

Armstrong 800 Inverted Bucket Steam Trap With Internal Check Valve
Armstrong International series 811 inverted bucket steam trap. 1/2" D501855 15 PSIG, 1/2" C5297-19 30 PSIG, 1/2" C5297-20 70 PSIG, 1/2" C5297-21 125 PSIG, 1/2" C5297-22 200 PSIG, 1/2" C5297-23 250 PSIG.

Armstrong 811 Inverted Bucket Steam Trap
Armstrong International series 811 inverted bucket steam trap with thermic vent. 1/2" D501855T 15 PSIG, 1/2" C5297-19T 30 PSIG, 1/2" C5297-20T 70 PSIG, 1/2" C5297-21T 125 PSIG, 1/2" C5297-22T 200 PSIG, 1/2" C5297-23T 250 PSIG.

Armstrong 811 Inverted Bucket Steam Trap With Thermic Vent