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ARMSTRONG INTERNATIONAL Steam Trap: Cast Iron, 3/4 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max. - Cast Iron In-line Float & Thermostatic Steam Traps
ARMSTRONG INTERNATIONALCast Iron In-line Float & Thermostatic Steam Traps

ARMSTRONG INTERNATIONAL Steam Trap: Cast Iron, 3/4 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max.

The ARMSTRONG INTERNATIONAL 75AI3 is a Cast Iron In-line Float & Thermostatic Steam Trap with a 3/4 in FNPT connection, rated for 1,800 lb/hr capacity, 75 psi maximum pressure, and 377°F maximum temperature. It…

SKU 3G-OTH-72954

Brand
ARMSTRONG INTERNATIONAL
Item
Steam Trap: Cast Iron, 3/4 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max.
Category
Cast Iron In-line Float & Thermostatic Steam Traps
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

ARMSTRONG INTERNATIONAL
Manufacturer Part Number
75AI3
Type
1,800 lb/hr, In-line
FNPT
3/4 in
Max.
75 psi
Float Material
Stainless Steel
Manufacturer Series
AI
Installation Orientation
Horizontal

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ARMSTRONG INTERNATIONAL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ARMSTRONG INTERNATIONAL 75AI3 is a Cast Iron In-line Float & Thermostatic Steam Trap with a 3/4 in FNPT connection, rated for 1,800 lb/hr capacity, 75 psi maximum pressure, and 377°F maximum temperature. It features a stainless steel float and is designed for horizontal installation.

Frequently Asked Questions

What is the ARMSTRONG INTERNATIONAL 75AI3 steam trap used for?

The ARMSTRONG INTERNATIONAL 75AI3 is a cast iron in-line float and thermostatic steam trap used to automatically drain condensate from steam lines while preventing steam loss. It is commonly applied in industrial heating systems, process steam mains, and heat exchangers where reliable condensate removal is critical.

What are the specifications of the ARMSTRONG INTERNATIONAL 75AI3?

The 75AI3 has a 3/4 in FNPT connection, a maximum capacity of 1,800 lb/hr, a maximum pressure of 75 psi, and a maximum temperature of 377°F. It features a stainless steel float, is designed for horizontal installation, and is part of the AI series from ARMSTRONG INTERNATIONAL.

Where to buy the ARMSTRONG INTERNATIONAL 75AI3 worldwide?

3G Electric supplies the ARMSTRONG INTERNATIONAL 75AI3 steam trap worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this cast iron float and thermostatic steam trap.

How to install the ARMSTRONG INTERNATIONAL 75AI3 steam trap?

Install the 75AI3 in a horizontal orientation with the inlet and outlet aligned with the pipe. Ensure the trap is positioned below the steam line to allow gravity drainage. Use pipe supports to avoid stress on the connections. Always follow ARMSTRONG INTERNATIONAL's generic installation guidelines for float and thermostatic traps.

Used in

Common applications for ARMSTRONG INTERNATIONAL
Chemical processing — Armstrong International inverted-bucket steam traps (e.g., 882-050-125) for condensate removal from heat exchangers.
Food and beverage — Armstrong International corrosion-resistant steam traps (e.g., 1811-050-200) for steam tracing on sanitary lines.
Refining — Armstrong International high-pressure steam traps (e.g., 1822-100-650) for process steam mains.
Commercial HVAC — Armstrong International steam spargers (e.g., MS6-1-1/4") for hot water generation in boiler systems.
Pharmaceutical — Armstrong International stainless-steel steam traps (e.g., 1811-050-400) for clean steam applications.
Power generation — Armstrong International cast-iron steam traps (e.g., 883-075-250) for turbine drain lines.

ARMSTRONG INTERNATIONAL Products

3G Electric supplies ARMSTRONG INTERNATIONAL cast iron in-line float & thermostatic steam traps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Steam Trap: Cast Iron, 1 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., In-line (MPN 75AI4)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 1 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., In-line (MPN 75AI4)
Steam Trap: Cast Iron, 3/4 in FNPT, 1,200 lb/hr, 15 psi Max., 353°F Max., In-line (MPN 15BI3)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 3/4 in FNPT, 1,200 lb/hr, 15 psi Max., 353°F Max., In-line (MPN 15BI3)
Steam Trap: Cast Iron, 1/2 in FNPT, 1,200 lb/hr, 15 psi Max., 353°F Max., In-line (MPN 15BI2)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 1/2 in FNPT, 1,200 lb/hr, 15 psi Max., 353°F Max., In-line (MPN 15BI2)
Steam Trap: Cast Iron, 3/4 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., C Pattern (MPN 75A3)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 3/4 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., C Pattern (MPN 75A3)

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Steam Trap: Cast Iron, 1 in FNPT, 2,100 lb/hr, 15 psi Max., 377°F Max., In-line (MPN 15BI4)
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Steam Trap: Cast Iron, 1 in FNPT, 2,100 lb/hr, 15 psi Max., 377°F Max., In-line (MPN 15BI4)
Steam Trap: Cast Iron, 3/4 in FNPT, 1,200 lb/hr, 30 psi Max., 353°F Max., In-line (MPN 30BI3)
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Steam Trap: Cast Iron, 1/2 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., In-line (MPN 75AI2)
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Steam Trap: Cast Iron, 1/2 in FNPT, 1,800 lb/hr, 75 psi Max., 377°F Max., In-line (MPN 75AI2)
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Steam Trap: Cast Iron, 3/4 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI3)
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Steam Trap: Cast Iron, 3/4 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI3)
Steam Trap: Cast Iron, 1/2 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI2)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 1/2 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI2)
Steam Trap: Cast Iron, 1 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI4)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 1 in FNPT, 1,100 lb/hr, 175 psi Max., 377°F Max., In-line (MPN 175AI4)
Steam Trap: Cast Iron, 1/2 in FNPT, 2,100 lb/hr, 30 psi Max., 353°F Max., In-line (MPN 30BI2)
ARMSTRONG INTERNATIONAL
Steam Trap: Cast Iron, 1/2 in FNPT, 2,100 lb/hr, 30 psi Max., 353°F Max., In-line (MPN 30BI2)