Emerson Alco 1840087 Valve

As a veteran contractor knows, the Emerson Alco 1840087 solenoid valve is a robust, pilot-operated 2-way normally closed valve built for demanding refrigerant control. This specific model features a 7/8" sweat (ODF) connection with copper extended ends, allowing for efficient brazing without internal disassembly. Designed as a direct replacement for 043204, it integrates a manual opening stem for emergency overrides or system commissioning. Engineered for liquid, suction, or discharge gas service, it provides a maximum working pressure of 500 psig (up to 680 psig in some series variants) and a 300 psig MOPD. This industrial solenoid valve utilizes a PTFE O-ring for superior external sealing and is compatible with all common HCFC and HFC refrigerants including R-22, R-134a, R-404A, and R-507. Note that this is a Valve Less Coil (VLC) unit, requiring an ASC2, AM, or DM coil for operation.

• Manual Override Capability: The integrated manual stem allows for manual opening during power failures or system evacuations.
• Simplified Installation: Extended solder connections permit brazing into the line without the risk of heat damage to internal gaskets.
• Universal Coil Compatibility: Designed to work with the standard Emerson ASC2 solenoid coil family, reducing truck stock requirements.
• Superior Sealing: High-grade PTFE O-ring construction ensures a leak-proof seal even under high fluid temperatures up to 250°F.
• Reliable Pilot Operation: Optimized for a minimum operating pressure drop of 2 psi, ensuring consistent valve shifting in suction gas service.

Is the 1840087 compatible with R-410A systems?
Yes, the 200RB series is rated for high-pressure refrigerants; however, always verify that your specific MOPD requirements do not exceed 300 psig for your application.

Does this valve include the solenoid coil?
No, this is a VLC (Valve Less Coil) model. You must purchase an Emerson ASC2 or equivalent coil separately to match your system voltage (e.g., 24V, 120V, or 240V).

Can this valve be mounted in any orientation?
For optimal performance, it is recommended to mount the solenoid tube within 90 degrees of the vertical upright position; mounting upside down is not recommended as it may trap debris.

This item is not eligible for free shipping.

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.