Product Overview
The ARMSTRONG 881 is a high-capacity inverted bucket steam trap engineered for reliable condensate drainage and air venting in industrial steam systems. Manufactured by Armstrong International, a globally recognized authority in steam and thermal utility management, the Model 881 operates on the inverted bucket principle: a submerged bucket rises under steam buoyancy to close the discharge valve, and falls under the weight of accumulated condensate to reopen it. This cyclic, modulating action delivers continuous condensate removal without live steam loss, making the 881 a critical component for process heating, steam distribution headers, and heat exchange equipment across heavy industry.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Inverted Bucket Steam Trap (Process & Pneumatic Valve) |
| Model Designation | ARMSTRONG 881 |
| Operating Pressure | Standard Industrial Grade (Up to rated differential pressure) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (Threaded or Flanged) |
Engineering Features & Advantages
- Precision Performance: The inverted bucket mechanism provides excellent resistance to water hammer, dirt, and wear, ensuring consistent condensate discharge and tight shutoff against live steam loss.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with a robust cast iron or steel body and stainless steel internal valve and seat assembly for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM Armstrong 881 mounting and piping standards, allowing drop-in replacement without system modification.
Typical Industrial Applications
The ARMSTRONG 881 inverted bucket steam trap is deployed across a wide range of heavy industrial scenarios, including steam distribution mains and drip legs, process heat exchangers and reboilers, plastic injection molding and rubber curing presses, and large-scale HVAC and district heating systems. Its ability to handle high condensate loads and vent air and non-condensable gases makes it a preferred choice for metallurgical steam headers, paper and pulp drying sections, and marine steam auxiliary lines.
PRODUCT IMAGES
ARMSTRONG 881 Inverted Bucket Steam Trap
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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