TV-2 Thermostatic Air Vent


For pressures to 125 psig (9 bar) . . .
Capacities to 46 scfm (78 m3h)

Armstrong offers the Model TV-2 balanced-pressure thermostatic air
vent for positive venting of air from chamber-type heat-transfer
equipment with no loss of steam. Typical applications include jacketed
kettles, retorts, vulcanizers, jacketed sterilizers or other contained
equipment where air could accumulate at the top of the steam chamber and
reduce heat-transfer capacity.

The thermostatic element is a charged
multi-convolution phosphor-bronze bellows caged in stainless steel.
Valve and seat are also stainless steel, designed to meet the most rigid
cycling specifications known for this type of service.

  • Stainless steel hemispherical valve and seat
  • Thermostatic element comprises a multi-convolution phosphor-bronze bellows caged in stainless steel
  • Thermostatic element is charged with water to
    provide positive opening of the valve at slightly below steam
    temperature and positive closing in the presence of steam throughout the
    operating pressure range
  • ASTM B62 cast bronze body

Armstrong Model V-2 thermostatic air vents should
be installed at the highest points of steam chambers with inlet
connections to the vents higher than the highest points of the chambers.
If they are installed in this manner, there is minimal hazard of any
liquid carryover, air can be vented to the atmosphere, and no drain line
is necessary.

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For help in specifying the exact model you need, download the product literature.

Product Literature 

Installation and Maintenance 

Submittal Drawing 
TV-2 Thermostatic Air Vent

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