Sporlan 903033P Pressure Control

The Sporlan 903033P is a high-performance LAC-5-180 head pressure control valve engineered to maintain stable condensing pressures during low ambient operations. In systems where outdoor temperatures drop, this Parker Sporlan LAC series valve prevents excessive liquid migration by flooding the condenser and bypassing hot gas directly to the receiver. This mechanism ensures the expansion valve receives a consistent subcooled liquid charge, preventing evaporator starvation and compressor cycling. Featuring a 7/8" ODF solder connection, the 903033P is a non-adjustable, factory-set component calibrated to 180 PSI. Built with a heavy-duty brass body and copper extensions, it is designed for seamless integration into commercial refrigeration and air conditioning racks. This OEM low ambient control is the industry standard for technicians requiring precise refrigerant transition management without the reliability issues of field-adjusted controls. Utilizing this head pressure regulator effectively extends the operational envelope of remote condenser systems in cold climates.

Technical Benefits for Contractors

• Automatic Head Pressure Regulation: Eliminates the need for manual fan cycling or complex dampers by automatically modulating refrigerant flow.
• High-Capacity LAC-5 Series: Designed for larger tonnage commercial systems requiring 7/8" piping to minimize pressure drop across the liquid line.
• Factory-Calibrated Precision: Fixed 180 PSI setting ensures drift-free operation and simplifies the commissioning process for refrigeration technicians.
• Superior Build Integrity: High-grade brass and copper construction provides maximum corrosion resistance and leak prevention in outdoor environments.
• Direct OEM Replacement: Ensures exact fitment and specification matching for existing Sporlan-controlled HVACR equipment.

Common Technical Inquiries

What is the function of the 180 PSI setting on the LAC-5-180?
The 180 PSI setting refers to the point at which the valve begins to open the bypass port to the receiver. This maintains the high-side pressure at a level sufficient to keep the thermostatic expansion valve (TXV) operating within its intended capacity during low outdoor temperatures.

Can the Sporlan 903033P be used with all refrigerants?
This valve is compatible with most common HFC, HCFC, and HFO refrigerants and oils. However, always verify that the 180 PSI setting aligns with the pressure-temperature relationship of your specific refrigerant (such as R-404A or R-22) to ensure the desired condensing temperature is maintained.

Is this valve field-repairable or adjustable?
No, the Sporlan 903033P is a hermetic, factory-set control. It is non-adjustable to prevent tampering and ensure calibration remains accurate over the life of the component. If the system requirements change or the valve fails, a direct unit replacement is required.

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.