Armstrong International 800-3/4-20 Trap Refrigerant Sub-Master Control: Responds to thermostat

Sub-Master Control: Responds to thermostat branch signals for accurate reset of air velocity setpoints in variable air volume systems

Always verify the limit control temperature range matches the original manufacturer specifications for the specific appliance

Automatic Reset Functionality: Minimizes nuisance lockouts by allowing the system to resume operation once it returns to a safe thermal state

ensuring heat dissipation is governed by the system blower airflow for maximum service life

Using this on a lower voltage control circuit may result in failure to pull in the contacts

Armstrong International 800-3/4-20 Trap Refrigerant Sub-Master Control: Responds to thermostatThe Armstrong International 800 3 4 20 Trap is a rugged cast iron inverted bucket steam trap engineered for reliable condensate management in horizontal piping configurations. This 3 4" NPT steam trap features a 3 16" orifice designed specifically for systems with a maximum operating pressure of 20 PSI, delivering a continuous discharge capacity of approximately 690 lbs hr. Built with a free floating stainless steel mechanism and no fixed pivots, the