
Spirax Sarco ABV21i/ABV40i Pneumatic Boiler Blowdown Ball Valves
Pneumatic boiler bottom blowdown ball valves with PN40 and Class 300 flange connections.

Spirax Sarco steam traps are classified by operating principle into float steam traps, bimetallic steam traps, balanced pressure steam traps, fixed discharge temperature steam traps, and other types. Float traps are suitable for continuous condensate discharge and significant load variations; bimetallic traps are commonly used for higher pressures or superheated steam; balanced pressure and fixed-temperature discharge traps are selected according to thermostatic characteristics and cleanliness requirements. When selecting a trap, consider differential pressure, discharge capacity, fluid cleanliness, and maintenance conditions.
