D500631 | 3/4" 21-AR Air Vent 133# 5/64" | Armstrong International Flow Rate_7.5Cv This 15-inch assembly ensures efficient

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D500631 | 3/4" 21-AR Air Vent 133# 5/64" | Armstrong International Flow Rate_7.5Cv This 15-inch assembly ensures efficientArmstrong International 3 4" 21 AR Air Vent: D500631 The Armstrong International 3 4" 21 AR Air Vent (D500631) is a vital component for efficient air release in industrial piping systems. This air vent is specifically designed for use with steam systems and features a compact, durable brass body construction. The 21 AR Air Vent incorporates a 5 64" orifice that optimally vents excessive air from the system while minimizing steam loss. It operates at