Sporlan 903031 Low Ambient Head Pressure Control Valve 100 Psi

Product Description

The SPORLAN 903031 is a low ambient head pressure control valve designed to regulate refrigerant flow in air-cooled condensing systems during cold-weather operation. Rated at 100 PSI with 1/2 inch ODF connections on the discharge, condenser, and receiver ports, this valve limits refrigerant flow from the condenser and bypasses hot gas around the condenser to the receiver when ambient temperatures drop. The valve body is brass with copper connections and features a knife edge metal-to-metal seat for reliable shutoff. This unit ships without a strainer and carries a maximum rated pressure of 500 PSIG. It is installed by licensed HVAC-R technicians as part of a head pressure control strategy in commercial and light commercial refrigeration or air conditioning systems.

The 903031 is suited for use in systems that operate year-round or in regions where outdoor ambient temperatures regularly fall below the design minimum for the condensing unit. Typical applications include rooftop air conditioners, remote condensing units, and refrigeration systems where maintaining adequate head pressure is required for proper metering device operation and system efficiency. The LAC valve body type is a standard configuration in Sporlan head pressure control assemblies. No specific compatible model numbers or system families were provided by the manufacturer for this listing.

Key Features

• 100 PSI pressure range for low ambient head pressure control
• Brass valve body with copper ODF connections for corrosion resistance
• Knife edge metal-to-metal seat provides positive, leak-resistant shutoff
• Domed steel element for reliable pressure response
• 1/2 inch ODF discharge, condenser, and receiver connections for straightforward field piping
• Ships without strainer — allows use with externally installed filter-drier or strainer assemblies
• 500 PSIG maximum rated pressure supports a range of common refrigerants

Compatibility

Designed as an OEM-style replacement or new-installation low ambient head pressure control valve for air-cooled condensing systems using 1/2 inch ODF refrigerant piping connections.

Installation Notes

Installation should be performed by a certified HVAC-R technician holding an EPA Section 608 certification. The system must be recovered, de-pressurized, and isolated before brazing or making any refrigerant circuit connections. Follow all applicable mechanical codes and the equipment manufacturer's piping diagrams when orienting and connecting discharge, condenser, and receiver ports. Do not apply torch heat directly to the valve body during brazing — use wet rags or a heat sink to protect internal components.