Armstrong C5297-50 881 1/2 in NPT 125 PSI Cast Iron Inverted Bucket Steam Trap
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The Armstrong C5297-50 is a new, cast iron inverted bucket steam trap from the 881 series, configured with 1/2 in FNPT connections and a 1/8 in orifice, rated for a maximum operating pressure (PMO) of 125 PSI (8.6 BAR) and a maximum temperature of 450°F. The inverted bucket mechanism operates on the density difference between steam and condensate, providing continuous, energy-efficient condensate discharge with excellent air venting capability at startup — the top-mounted manual air vent (visible in product photos) allows for manual purging. Armstrong part number C5297-50 encodes the 881 series base model, 1/2 in NPT connection size, and 1/8 in orifice size; the Grainger cross-reference 36Y224 is also labeled on the shipping carton. This trap is suitable for steam distribution systems, process heating, drip legs, and tracer lines operating at low-to-medium pressures up to 125 PSI, and ships complete with a built-in strainer as standard equipment per Armstrong 881 series specifications.
Product Specifications
| Brand | Armstrong International |
| Part Number | C5297-50 |
| Series | 881 |
| Trap Type | Inverted Bucket |
| Body Material | Cast Iron |
| Connection Size | 1/2 in |
| Connection Type | FNPT |
| Orifice Size | 1/8 in |
| Max Operating Pressure (PMO) | 125 PSI (8.6 BAR) |
| Max Temperature | 450°F |
| Condensate Capacity | 950 lb/hr |
| Strainer | Included |
| Manual Air Vent | Top-mounted, included |
| Condition | New |
| Cross Reference | 36Y224 |