Armstrong International steam traps, trap repair parts, temperature regulators, valves, air vents and humidifier components — 1,965 part numbers across the six lists below. Armstrong has built inverted bucket traps since 1911, and most of what fails in the field is a repairable internal rather than the trap body. Search any list by part number, or send us the number from your existing unit. If it isn’t listed, send it anyway; we source Armstrong International parts beyond this list. Requests received before 3 PM ET are typically quoted the same business day.
Steam Traps, F&T Traps & Drainers
957 parts · inverted bucket traps in the 200, 800 and 880 series, float & thermostatic traps, pump traps and liquid drainers
Trap Repair Kits, Caps & Internals
478 parts · repair kits and mechanisms, replacement caps and covers, gaskets, O-rings, orifices, seats and fasteners
Valves, Air Vents & Controls
173 parts · GP-1000 and GP-2000 pressure regulators, GD-series reducing valves, thermostatic air vents, actuators and switches
Strainers, Connectors & Other Parts
148 parts · cast iron, bronze and stainless strainers, connectors, separators, diaphragms, cartridges and adjusters
Temperature Regulators & Capillary Systems
119 parts · OB-30 heating and OB-31 cooling regulators, five temperature bands, capillary lengths of 6.5, 9.5 and 16.25 feet
Humidifier Parts & Electrical
90 parts · electrodes, heating elements, ionic beds and tank components for EHU, HC and GFH ranges, plus transformers and controls