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ARMSTRONG INTERNATIONALThermostatic Air Vents

ARMSTRONG INTERNATIONAL Thermostatic Air Vent, Cast Iron, 75 psi, 377°F, A9739

This is a thermostatic air vent from ARMSTRONG INTERNATIONAL, designed as a repair part for steam systems. It features a cast iron body with a maximum pressure rating of 75 psi and a maximum temperature of 377°F. The…

SKU 3G-OTH-70322

Also listed as: A 9739 · A-9739

Brand
ARMSTRONG INTERNATIONAL
Item
Thermostatic Air Vent, Cast Iron, 75 psi, 377°F, A9739
Category
Thermostatic Air Vents
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

ARMSTRONG INTERNATIONAL
Manufacturer Part Number
A9739
Product Type
Air Vent

Technical Documents

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

Product Description

This is a thermostatic air vent from ARMSTRONG INTERNATIONAL, designed as a repair part for steam systems. It features a cast iron body with a maximum pressure rating of 75 psi and a maximum temperature of 377°F. The product is identified by manufacturer part number A9739.

Frequently Asked Questions

What is the Armstrong International A9739 thermostatic air vent used for?

The Armstrong International A9739 is a repair part for steam systems. It is a thermostatic air vent with a cast iron body, designed to automatically release air from steam equipment, improving heat transfer and system efficiency. It is commonly used in industrial steam heating and process applications.

What are the specifications of the Armstrong A9739 air vent?

The Armstrong A9739 is a thermostatic air vent with a cast iron body. It has a maximum pressure rating of 75 psi and a maximum temperature of 377°F. The manufacturer part number is A9739, and it is designed as a repair part for steam systems. Always verify compatibility with your existing equipment.

Where to buy the Armstrong A9739 air vent worldwide?

You can source the Armstrong A9739 thermostatic air vent through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we source and deliver this repair part to your location.

How to install the Armstrong A9739 thermostatic air vent?

Install the Armstrong A9739 by first depressurizing and draining the steam system. Remove the old vent and clean the mounting surface. Apply thread sealant to the new vent's threads and tighten to the manufacturer's recommended torque. Test for leaks after system repressurization. Always follow Armstrong International's installation guidelines.

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 thermostatic air vents. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Angled-connection air vent with vertical discharge, 3/4 in FNPT top port, stainless steel body. For steam systems, rated 267 psi max pressure and 500°F max temperature. Used to remove air from steam lines for improved heat transfer and corrosion prevention
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Angled-connection vertical-discharge air vent with top port and 3/4 in FNPT connection. Cast iron body rated for steam service, with maximum pressure of 146 psi and maximum temperature of 450°F. Used in steam systems to automatically vent air from piping and equipment
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Angled-connection vertical-discharge air vent with top port and 3/4 in FNPT connection. Cast iron body rated for steam service, with maximum pressure of 146 psi and maximum temperature of 450°F. Used in steam systems to automatically vent air from piping and equipment
Cast iron air vent with top port and 3/4 in FNPT connection, designed for steam service. Automatically releases air from piping and equipment to prevent air binding. Rated for 173 psi maximum pressure and 450°F maximum temperature
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Cast iron air vent with top port and 3/4 in FNPT connection, designed for steam service. Automatically releases air from piping and equipment to prevent air binding. Rated for 173 psi maximum pressure and 450°F maximum temperature
Angled-connection air vent with vertical discharge for steam systems. Features a 3/4 in FNPT top port, stainless steel body, rated for 178 psi max and 500°F max. Used to remove air from steam lines in industrial and HVAC applications
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Angled-connection air vent with vertical discharge for steam systems. Features a 3/4 in FNPT top port, stainless steel body, rated for 178 psi max and 500°F max. Used to remove air from steam lines in industrial and HVAC applications

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Thermostatic air vent with cast iron body, rated for 30 psi maximum pressure and 377°F maximum temperature. Automatically releases air and non-condensable gases from steam systems while preventing steam loss. Suitable for use in steam mains, heat exchangers, and industrial heating processes to improve system efficiency