Emerson Alco 047506 Solenoid Valve

The Emerson Alco 047506, specifically the 200RB4F3 model, is a heavy-duty pilot operated refrigeration solenoid valve designed for liquid line, suction line, and hot gas service. This 2-way normally closed valve features 3/8-inch flare connections and is engineered for high-cycle applications where reliability is critical. With an R22 cooling capacity of 8.0 tons and R134a capacity of 6.0 tons, it provides precise flow control across diverse refrigerant types, including R404A and R507. Its 200RB series construction utilizes a PTFE valve seat to ensure tight shut-off and minimize internal leakage. Field technicians frequently specify this component for its low pressure drop characteristics and robust solenoid valve body design, which simplifies maintenance in commercial refrigeration and air conditioning systems. The pilot-operated mechanism ensures consistent operation even at low pressure differentials, making it a reliable solution for demanding field environments.

• Extended Compatibility: Rated for multiple refrigerants including R22, R134a, R404A, and R507.
• Optimized Flow: High-capacity design provides 8.0 tons (R22) while maintaining a minimal pressure drop.
• Durable internal Components: Features a PTFE seat for superior sealing and resistance to debris.
• Simplified Installation: Standard 3/8" flare fittings allow for quick replacement without brazing in tight spaces.
• High MOPD: Engineered to open reliably under high pressure differentials common in hot gas bypass or liquid line applications.

What is the function of the pilot-operated design in the 200RB series?
The pilot-operated mechanism uses the refrigerant pressure differential to assist the valve in opening. This allows for a smaller coil to control high flow rates, ensuring the valve remains responsive even under high head pressure.

Can the 200RB4F3 be mounted in any orientation?
For optimal performance and to prevent debris accumulation on the diaphragm, it is recommended to install the valve in a horizontal pipeline with the solenoid coil in an upright vertical position.

Is the coil included with this valve body?
This Emerson Alco 047506 is the valve body only. It requires a compatible AMG or OMC series coil (sold separately) to complete the assembly.

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.