Parker 101842 Regulator

The Parker 101842 is a high-performance A81OES inlet pressure regulator designed for heavy-duty refrigeration systems requiring precise evaporator pressure control. Featuring a 1-1/8" ODF solder connection and a full 1-1/8" port size, this valve is engineered to prevent evaporator temperatures from dropping below a predetermined set point, protecting your chiller or air conditioning system from freeze-ups. The externally equalized design ensures accurate pressure regulation even in systems with high pressure drops across the evaporator. Built with a robust ductile iron body and stainless steel trim, this Parker Sporlan A8 series regulator is rated for high-pressure refrigerants including R-404A, R-507, and R-134a. As an evaporator pressure regulating valve, it is ideal for parallel compressor racks where maintaining tight temperature tolerances across multiple walk-ins or display cases is critical for food safety and system efficiency.

Technical Specifications and Benefits

• Precise Pressure Modulation: Maintains consistent evaporator pressure regardless of fluctuations in suction header pressure.
• Durable Construction: High-grade ductile iron housing with specialized internal components to resist corrosion and mechanical wear.
• Broad Compatibility: Fully compatible with standard HCFC and HFC refrigerants and various refrigeration mineral and POE oils.
• Field Serviceable: The Parker 101842 allows for easy internal access for maintenance or cleaning without removing the valve body from the line.
• Optimal Fluid Flow: Large 1-1/8" port minimizes pressure drop while maximizing capacity for large-tonnage commercial applications.

Common Installation and Troubleshooting Questions

How do I set the pressure on a Parker A81OES regulator?
Adjustments are made via the adjustment screw on the pilot assembly. Turn the screw clockwise to increase the pressure set point or counter-clockwise to decrease it. Use a calibrated gauge on the access valve to verify the set point during steady-state operation.

Can the Parker 101842 be used as a crankcase pressure regulator?
While both modulate pressure, the A81OES is specifically designed for inlet pressure regulation (evaporator side). Using it as a CRO (crankcase regulator) would require a different configuration to protect the compressor motor from overload during hot pulls.

What is the maximum operating pressure (MRP) for this valve?
The Parker A8 series is typically rated for a maximum opening pressure differential suitable for most commercial refrigeration cycles, but always verify current system pressures against the 450 psi standard rating for these components.

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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.