Armstrong International D24649 Valve Body

The Armstrong International D24649 Valve Body is a professional-grade 3/4 inch angle pattern thermostatic radiator valve designed for precision temperature control in low pressure steam and hydronic heating systems. Engineered as an RV-4 thermostatic radiator valve body, this component is 100% interchangeable with the Armstrong 6005671 model. It features a high-performance nickel-plated brass body that resists corrosion and scaling in demanding environments. Equipped with the standard "A" insert, this valve utilizes an EPDM seat to ensure a tight shut-off and reliable modulating service. It is rated for a maximum operating pressure of 15 PSI for steam and 150 PSI for water, withstanding temperatures up to 250°F (121°C). This NPT screwed connection valve is the go-to choice for contractors looking to optimize individual room temperature control through automatic air venting and thermostatic regulation, ensuring system efficiency and occupant comfort in commercial or residential radiator applications.

• Universal Compatibility: Direct replacement for the Armstrong 6005671, ensuring zero-downtime retrofits.
• Rugged Construction: The nickel-plated brass valve body provides superior durability against system debris and harsh water chemistry.
• Precise Modulation: Works seamlessly with Armstrong LV-4 or WV-4 thermostatic operators for accurate space heating.
• Serviceable Design: Compatible with in-service repair tools, allowing for valve insert maintenance without draining the entire hydronic loop.
• High Thermal Tolerance: Safely handles low pressure steam service up to 250°F, ideal for older infrastructure upgrades.

Is the D24649 compatible with one-pipe steam systems?
Yes, the RV-4 series is specifically engineered to provide automatic control for one-pipe steam radiators through efficient air venting when paired with the correct thermostatic operator.

What is the difference between an "A" insert and an "S" insert?
The "A" insert is the standard brass and EPDM configuration for general radiator valve service. The "S" insert is typically reserved for more aggressive steam environments where longer service life is required.

Can I replace the internal components without removing the valve body?
Contractors can utilize an Armstrong in-service repair tool to swap the valve insert if seats become damaged by pipe scale, preventing the need for invasive repiping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.