Parker 101905 Regulator

The Parker 101905 is a high-performance A81OE inlet pressure regulator designed for precise pressure control in commercial refrigeration and HVAC systems. Featuring a 1-1/8" ODF solder connection and a full 1-1/8" port, this regulator is engineered to maintain constant evaporator or suction pressure regardless of load fluctuations. As an externally equalized valve, it provides superior accuracy in tracking system changes, making it ideal for defrost pressure control and hot gas bypass applications. The rugged construction ensures durability in demanding environments, while the normally open configuration allows for streamlined system protection. This Parker Hannifin regulator is highly compatible with standard HCFC and HFC refrigerants, offering contractors a reliable solution for minimizing pressure drops and optimizing evaporator efficiency. Integrating this commercial refrigeration valve into your rack system ensures stable operating temperatures and protects compressors from erratic suction pressure spikes during high-load cycles.

• Precision Pressure Regulation: Maintains consistent setpoint accuracy for evaporator pressure control and suction line stability.
• High Flow Capacity: The 1-1/8" port size ensures minimal pressure drop across the valve, maximizing thermal efficiency.
• External Equalization: Provides improved response time and sensitivity compared to internally equalized models for complex piping layouts.
• Oversized ODF Connections: Standard 1-1/8" ODF sweat fittings allow for direct installation into high-capacity refrigeration lines.

Common Technical Inquiries

How does the Parker A81OE handle variable loads?
The Parker 101905 utilizes its external equalization port to sense pressure at the evaporator outlet, allowing the valve to modulate precisely based on actual system demand rather than internal valve pressure.

Is this regulator suitable for hot gas bypass applications?
Yes, this inlet pressure regulator is frequently utilized in bypass circuits to prevent evaporator coil freezing and maintain minimum suction pressure at the compressor during low-load conditions.

What refrigerants are compatible with the A81 series?
These valves are designed for use with a wide range of common refrigerants including R-22, R-134a, R-404A, and R-507, making them a versatile choice for field replacements and new builds.

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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.