Parker 100912 Regulator

The Parker 100912 is a professional-grade A9 Hot Gas Bypass Regulator engineered to maintain stable evaporator pressures in commercial refrigeration and air conditioning systems. This internally equalized regulator features a 5/8" ODF (OD Sweat) connection and a 5/8" port, calibrated for a precise adjustment range of 10" Hg vacuum to 120 psig (Range A). By modulating refrigerant flow, the Parker Flo-Con A9 prevents compressor short-cycling and ensures consistent humidity control and oil return under low-load conditions.

Constructed with a pilot-operated, ductile iron body and brazed copper couplings, the 100912 regulator allows for direct line soldering without the need for teardown. The sweat end design simplifies installation, while the valve remains fully serviceable in-line for maintenance or cleaning. This commercial pressure regulator is compatible with standard high-pressure refrigerants and is rated for a Maximum Rated Pressure (MRP) of 400 psig (27.5 bar), making it a reliable choice for evaporator pressure regulation and hot gas bypass applications.

• Precise Pressure Control: Pilot-operated mechanism provides close regulation within a 5 psi window from closed to open.
• Efficient Installation: Sweat end design enables soldering into the line without disassembly, reducing labor time.
• In-Line Serviceability: Designed for easy cleaning and maintenance without removing the valve body from the piping.
• System Protection: Eliminates compressor short-cycling and stabilizes suction pressure for improved component longevity.
• Wide Compatibility: 10" Hg to 120 psig range covers standard commercial temperature applications.

Is the Parker 100912 externally or internally equalized?
This model is internally equalized (Type A9), sensing pressure directly at the valve outlet. Use this configuration when outlet pressure sensing is sufficient for your bypass requirements.

Can this regulator handle high-pressure refrigerants?
Yes, the A9 series is rated for a Maximum Rated Pressure of 400 psig and maintains performance across a temperature range of -50°F to 200°F.

How do I adjust the pressure setting on the A9 regulator?
After loosening the seal nut, turn the adjusting stem clockwise to increase the pressure setting or counter-clockwise to decrease it. For Range A, one full turn is approximately 16 psi.

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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.