The Armstrong B4 Cast Iron Float and Thermostatic Steam Trap provides continuous condensate drainage with high air-venting capacity. ASTM A48 Class 30 cast iron body rated to 175 psig at 377°F (12 barg at 191°C), capacity up to 2,250 lb/hr (1,021 kg/hr), 30 psig MOP.
The thermostatic air vent element provides compensated response from vacuum to 30 psig, ideal for vacuum return heating systems.
Key Features
- Continuous condensate drainage
- High air-venting capacity via thermostatic element
- ASTM A48 Class 30 cast iron body rated to 175 psig
- Capacity up to 2,250 lb/hr (1,021 kg/hr)
- Operates from vacuum to 30 psig
- 1″ (25 mm) screwed connection
Applications
Designed for heating service including radiators, unit heaters, and heat exchangers. Well-suited for vacuum return systems.
