Advanced Distributor Products 176799976 Piston Orifice

The Advanced Distributor Products 176799976 Piston Orifice is a high-precision metering component engineered to optimize refrigerant flow within residential and commercial HVAC systems. Specifically designed for R410A refrigerant systems, this size #76 piston orifice ensures the consistent performance of 4-ton evaporator coils by maintaining an exact pressure drop as liquid refrigerant enters the coil. This "fixed-bore" metering device is a preferred OEM solution for its durability, as it contains no moving internal parts that could fail over time.

By utilizing the ADP #76 R410A piston orifice, technicians can achieve the target superheat required for maximum cooling efficiency and humidity control. This 10-pack of replacement HVAC pistons is an essential stock item for service calls involving a flowrater piston replacement or system retrofits. Correct sizing is critical; an undersized or clogged orifice can lead to starving the evaporator, while an oversized one may cause liquid slugging. Trust this genuine ADP metering device to restore factory-spec efficiency to your air handler or heat pump system.

• Precise Flow Control: Engineered to the exact #76 bore size to ensure optimal refrigerant saturation in 48 MBTUH (4-ton) systems.
• Dual Refrigerant Compatibility: While optimized for R410A, this OEM part also supports R22 applications in specific legacy configurations.
• Durability and Reliability: Fixed orifice design eliminates the mechanical failure risks associated with complex thermostatic expansion valves (TXVs).
• Value Pack: Included 10-pack provides a cost-effective solution for large-scale maintenance or multiple equipment upgrades.
• Seamless Integration: Genuine Advanced Distributor Products (ADP) replacement part for guaranteed fit within Chatleff-style housings.

• What are the symptoms of a clogged #76 piston orifice? A restriction typically manifests as high superheat, low suction pressure, and frost formation on the liquid line side of the housing.
• Can I use a #76 orifice for a 3-ton system? No, using a size #76 in a 3-ton unit would result in an oversized orifice, causing low superheat and potentially flooding the compressor with liquid refrigerant.
• How do I determine if I need a piston replacement? If your system is exhibiting irregular pressures that cannot be fixed by adjusting the charge, the piston may be the incorrect size or contaminated with debris.

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.

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