Parker 900409P Regulator

The Parker 900409P Regulator, specifically the Sporlan CRO-6 0/60, is a high-performance crankcase pressure regulating valve designed to protect compressor motors from the excessive torque caused by high suction pressures. As a direct-acting, adjustable suction line regulator, it effectively throttles vapor flow from the evaporator when pressure exceeds the setpoint, which typically occurs after a hot gas defrost cycle or prolonged shutdown. This 1/2" ODF sweat connection model features a wide adjustment range of 0 to 60 psig, allowing technicians to fine-tune the maximum permitted suction pressure for specific system requirements. Built with a hermetic brass construction and stainless steel internals, the 900409P ensures long-term reliability in commercial refrigeration and air conditioning applications. It is critical for preventing motor burnouts and maintaining stable operation in low-temperature systems, where pulldown loads can otherwise overwhelm the compressor. This component is essential for any HVACR refrigeration system using R-22, R-404A, R-507, or other common refrigerants.

• Compressor Overload Protection: Prevents motor damage by limiting crankcase pressure to a safe, technician-defined maximum.
• Adjustable Pressure Range: Features a versatile 0/60 psi range for precise system calibration during commissioning.
• Hermetic Brass Design: Durable construction with 1/2" ODF connections reduces leak potential in high-vibration suction lines.
• Optimized Pulldown: Smoothly modulates refrigerant flow to ensure the compressor maintains efficiency even during heavy-load startups.

Common Questions About the Parker CRO-6 Regulator

How do I set the pressure on a Sporlan CRO-6?
To adjust the Parker 900409P, remove the cap and turn the adjustment screw clockwise to increase the pressure setting or counter-clockwise to decrease it. For best results, adjust the valve during a pulldown period while monitoring the compressor's amperage draw to ensure it does not exceed the manufacturer's nameplate rating.

Where should the 900409P be installed in the system?
This crankcase pressure regulator must be installed in the suction line between the evaporator and the compressor. It should be positioned downstream of any other suction line controls, such as an EPR or solenoid valve, to accurately sense and limit the pressure entering the compressor crankcase.

Is the CRO-6 compatible with modern refrigerants?
Yes, the Sporlan CRO-6 series is designed for broad compatibility with standard HFC, HCFC, and HFO-blend refrigerants. Always verify the maximum working pressure (typically 400 psig) against your specific system requirements.

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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.