The Parker 101764 Regulator, of the Flo-Con A8 series, is an A81BL differential pressure regulator engineered for demanding commercial refrigeration and air conditioning systems. This veteran-recognized differential pressure regulating valve features a 1 3/8" port and 1 5/8" ODF brazed copper couplings, integrated into a rugged ductile iron body. Designed for precision control, the A81BL includes an electric wide-open (bypass) feature, allowing technicians to force the valve into a full-flow state—ideal for hot gas defrost or rapid pull-down applications. This model is internally equalized and maintains a constant differential between its inlet and outlet pressures, operating within a standard range of 0 to 120 psig. Its pilot-operated design ensures stable modulation even under light load conditions, while the stainless steel diaphragms eliminate the failure points associated with traditional bellows. This sweat-in-place unit allows for complete top-side serviceability, facilitating fast cartridge replacement or maintenance without the need for extensive piping modifications on the job site. Key Benefits: Dual-Function Modulation: Regulates differential pressure accurately while providing an electric bypass for wide-opening versatility in complex system cycles. Field Service Efficiency: Features a modular design with all-service-from-the-top capability, allowing for cleaning or part replacement without disturbing sweat connections. Reliable Construction: The ductile iron valve body and stainless steel diaphragms offer long-term durability against pressure fluctuations and ambient changes. Application Flexibility: Primarily utilized for maintaining oil receiver pressure, discharge differential, or liquid line differential in commercial racks. Common Questions: What is the purpose of the 'BL' suffix on this A8 regulator? The 'B' indicates a wide-opening (bypass) feature controlled by a solenoid, while the 'L' designates it as a differential pressure regulator. When the coil is energized, the valve opens wide to allow maximum flow regardless of the setting. Can I service this valve without removing it from the line? Yes, the Parker A81BL is designed for sweat-in-place installation. All internal components, including the capacity cartridge and pilot assembly, are accessible from the top of the valve. Does this regulator require an external equalizer line? No, the 101764 model is internally equalized, simplifying installation compared to 'OE' (outlet externally equalized) models that require a field-installed pilot line. 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.
