Emerson Alco 047502 Solenoid Valve

The Emerson Alco 047502 Solenoid Valve, specifically the 100RB2P2 series, is a rugged, direct-acting refrigeration solenoid valve designed for liquid line and suction line applications. This 2-way normally closed valve features 1/4" NPT connections and is engineered for precise refrigerant flow control in smaller tonnage systems. For field technicians, the 100RB2P2 provides a reliable R22 capacity of 1.27 tons and an R134a capacity of 1.2 tons at standard conditions. Its compact, poppet-style construction allows for operation without a minimum pressure drop, making it ideal for systems with varying load requirements. The brass body and high-grade internal components ensure durability against thermal cycling and vibration. When replacing a refrigerant solenoid valve, ensure the coil voltage matches the existing control circuit, as this body is compatible with standard Emerson AMG and AMF coils. This specific model provides a cost-effective solution for preventing migration and ensuring positive shut-off in a variety of HVAC and commercial refrigeration setups.

Key Technical Benefits

• Direct-acting design eliminates the need for minimum pressure differential to open the valve, ensuring performance in low-pressure scenarios.
• Normally closed (NC) configuration provides a fail-safe shut-off during power loss or system standby.
• Compatible with a wide range of refrigerants, including R22, R134a, R404A, and R507.
• Compact 1/4" NPT ports allow for straightforward installation in tight mechanical headers and condensing units.
• Proven Alco 100RB series reliability reduces the risk of refrigerant bypass and improves system efficiency.

Commonly Asked Questions

Does this valve come with a solenoid coil?
This item is the solenoid valve body only. You must match it with the appropriate Emerson AMG or AMF coil based on your specific voltage requirements (e.g., 24V, 120V, or 240V).

Can the 100RB2P2 be installed in any orientation?
For optimal performance and to prevent debris accumulation, it is recommended to install the valve with the coil in a vertical upright position, though standard practice allows for slight deviations depending on the piping layout.

What is the maximum operating pressure differential (MOPD) for this valve?
The Emerson 100RB2P2 is typically rated for an MOPD up to 300 psi, though this can vary slightly based on the specific coil used and the refrigerant type being metered.

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.