Emerson Alco 058950 Solenoid Valve

The Emerson Alco 058950 (200RB4T5) is a pilot-operated, 2-way normally closed refrigeration solenoid valve engineered for liquid, discharge, or suction line service. Built with a 5/8" ODF sweat connection, this valve features a rugged brass body and stainless steel internal components to ensure long-term reliability in high-pressure environments. With an R22 capacity of 8.0 tons and an R134a capacity of 6.0 tons, the 200RB series is a versatile choice for commercial refrigeration and air conditioning systems. This model serves as the direct replacement for the Danfoss 032L7122; however, field technicians must note that a new solenoid coil is required for installation, and supply voltage must be verified to ensure proper actuator compatibility. The pilot-operated design allows for high MOPD (Maximum Operating Pressure Differential) while maintaining a low-pressure drop across the orifice, ensuring optimal mass flow rates through the 5/8" refrigerant line.

Key Technical Benefits

• Extended Service Life: High-grade PTFE valve seats provide superior sealing and thermal resistance across varying temperature ranges.
• Simple Field Maintenance: The take-apart design allows for internal cleaning or component replacement without de-soldering the valve body from the line.
• Broad Refrigerant Compatibility: Optimized for use with HFC and HCFC refrigerants including R22, R134a, R404A, and R507.
• Enhanced Flow Capacity: The pilot-operated piston assembly ensures high-capacity performance, making it suitable for larger residential and light commercial evaporators.

Frequently Asked Questions

Can I use my existing Danfoss coil on the 058950 replacement?
No, the Emerson 200RB4T5 requires a compatible Emerson ASC2 or AMG series coil. Always verify the voltage and frequency of the replacement coil to match your control circuit.

What is the maximum operating pressure for this solenoid valve?
The Emerson 200RB series is generally rated for a Maximum Working Pressure (MWP) of 680 psig, though you should always check the specific stamping on the valve body for your application's safety margins.

Is this valve suitable for hot gas bypass applications?
Yes, the normally closed solenoid valve design and robust internal construction make it effective for hot gas service, provided the tonnage requirements and pressure differentials are within the specified technical limits.

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.