The Spence TAV is a high capacity thermostatic air vent. It’s balanced pressure design stainless steel welded actuator is capable of discharging air within 35°F / 2°C of saturated temperature. The thermostatic actuator employs a conical valve lapped in matched sets with the seat ring assuring tight shut off. Vent is stainless steel bodied suitable for pressures to 650 psig / 45 bar and available in NPS 3/8 to 1 / DN 10 to 25 with NPT or socket weld connections.