Emerson Alco 063278 Solenoid Valve

The Emerson Alco 063278 Solenoid Valve, specifically the 500RB2T2 model, is a heavy-duty 2-way normally open solenoid valve designed for precision refrigerant flow control. Engineered as a pilot-operated refrigeration valve, this unit features 1/4" ODF sweat connections and is built to handle high-pressure environments common in commercial refrigeration and air conditioning systems. With a nominal R22 capacity of 3.1 tons and an R134a capacity of 2.9 tons, it ensures optimal performance across multiple refrigerants, including R404A and R507. This valve serves as the direct replacement for R15E32 models. When retrofitting, technicians must verify the existing voltage, as a coil replacement is required to ensure electrical compatibility with the system controller. The rugged construction minimizes pressure drop while providing reliable shut-off and opening cycles in demanding thermal expansion applications.

• Normally Open Configuration: Ensures refrigerant flow continues during power loss or coil failure, preventing system slugging in specific circuit designs.
• High Flow Capacity: Rated for 3.1 tons (R22) and 2.9 tons (R134a) to support medium to large evaporator loads.
• Pilot Operated Design: Utilizes system pressure differentials to assist valve actuation, reducing the electrical load required from the solenoid coil.
• Sweat Connections: 1/4" ODF connections allow for a standard brazed installation, ensuring a leak-proof seal in high-vibration environments.
• Cross-Compatibility: Engineered as a drop-in mechanical replacement for the legacy Alco R15E32 series.

Is the coil included with the 063278 valve body?
No, this is the valve body only. You must select the appropriate AMG or ASC2 coil based on your system's voltage requirements (e.g., 24V, 120V, or 240V).

What is the maximum operating pressure differential (MOPD) for the 500RB series?
The 500RB series is designed for high-pressure refrigerants and typically maintains a high MOPD suitable for hot gas defrost or liquid line applications.

Can I use this valve with R410A systems?
You must verify the specific pressure ratings for your application; while many 500RB series valves are compatible with modern refrigerants, always check that the MOPD exceeds your system’s peak discharge pressure.

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.