Sporlan 903111P Control Valve

The Sporlan 903111P is a heavy-duty LAC-4-295HP head pressure control valve designed specifically for low ambient operation in high-pressure systems. Featuring 3/8" ODF connections, this three-way modulating valve maintains stable head pressure by restricting liquid flow from the condenser while diverting hot gas directly to the receiver. This critical action prevents low suction pressure and evaporator icing, ensuring consistent refrigerant mass flow through the expansion valve even when outdoor temperatures drop. Designed for a 295# setting, it is ideal for R-410A refrigeration systems and other high-pressure applications where maintaining a minimum condensing pressure is non-negotiable for system reliability. The non-adjustable brass body and copper fittings provide a robust, leak-free solution for professional contractors managing low ambient head pressure control in commercial air conditioning and refrigeration units.

• Precise Modulation: Automatically balances discharge and receiver pressure to prevent system surging during cold weather starts.
• High-Pressure Capability: Factory-set at 295 PSI to meet the demands of modern high-pressure refrigerants.
• Simplified Installation: 3/8" ODF solder connections allow for traditional brazing into the discharge, condenser, and receiver lines.
• System Protection: Minimizes refrigerant migration and flood-back issues by keeping the liquid line at optimal pressure.

What is the maximum working pressure for this valve?
The Sporlan LAC-4 series is designed with a high structural integrity, typically rated for a maximum equivalent working pressure of 500 PSI.

Does this valve require a separate strainer?
While the 903111P can be used without one, installing a 40-mesh inlet strainer is highly recommended to protect the internal bellows from debris.

Can I adjust the 295# pressure setting?
No, the Sporlan LAC-4-295HP is a non-adjustable, factory-set valve to ensure consistent performance and eliminate field-calibration errors.

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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.