Emerson Alco 047500 Solenoid Valve

The Emerson Alco 047500, also identified by the model number 100RB2F2, is a 2-way normally closed solenoid valve engineered for liquid line service in light-commercial refrigeration systems. Utilizing a direct-acting plunger design, this 1/4" SAE flare valve operates without the need for a minimum pressure drop, ensuring reliable opening and closing even in low-load scenarios. The 100RB series is built with a rugged brass body and stainless steel internal components to withstand the vibrations of a condensing unit. Rated for high-pressure refrigerants, it delivers an R22 capacity of 1.27 tons and an R134a capacity of 1.2 tons. This valve is a standard replacement for refrigerant flow control in applications requiring precise solenoid seat sealing and compatibility with poppet-style valve configurations. Proper installation requires a compatible AMG or AM series coil to ensure the electromagnetic field correctly actuates the normally closed refrigeration valve seat.

• Direct-Acting Design: Eliminates the requirement for a minimum pressure differential, making it ideal for low-pressure liquid line applications.
• Synthetic Sit Material: High-grade PTFE seating provides a bubble-tight shut-off to prevent refrigerant migration during the off-cycle.
• Flare Connections: The 1/4" SAE flare fittings allow for straightforward mechanical installation and serviceability without brazing.
• Broad Refrigerant Compatibility: Designed for use with R22, R134a, R404A, and R507, providing versatility across legacy and modern HVACR systems.
• Extended Life Cycle: Features a rugged stainless steel enclosing tube and plunger designed for millions of cycles without mechanical fatigue.

Common HVACR Questions:

Does the 100RB2F2 require a specific mounting orientation?
To prevent debris accumulation and ensure proper plunger gravity return, the valve should be mounted with the coil in a vertical, upright position (within 45 degrees of vertical).

Can this solenoid valve be used for suction line service?
While primarily used for liquid lines, the direct-acting nature of the 100RB series allows it to function in suction applications, provided the mass flow and pressure drop do not exceed the valve's technical specifications for the specific refrigerant used.

Are the coils included with the 047500 valve body?
No, this is the valve body only. You must select the appropriate solenoid coil (such as the AMG or ASC2 series) based on your system's voltage requirements (e.g., 24V, 120V, or 240V).

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.