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

  • $466.00
    Unit price per 


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



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