The Johnson Controls SEC99AB-18 is a professional-grade UltraCap Armored Capillary designed for high-duty pressure connections in commercial refrigeration and air conditioning systems. This assembly features a 0.06-inch internal diameter copper capillary tube encased in a rugged brass armor sleeve, specifically engineered to withstand intense system vibration and prevent premature fatigue failure. The 18-inch length provides the necessary flex to isolate pressure-actuated controls from compressor-induced harmonics, minimizing pressure pulsation for more accurate switch or transducer response. This model is equipped with 1/4" SAE female flare fittings, including a straight end and a 90-degree elbow to facilitate routing in tight mechanical compartments. Both ends host an integral Schrader valve depressor with a break-away design, ensuring efficient refrigerant pressure monitoring and connectivity without fluid loss. Rated for a maximum working pressure of 690 psi and a burst pressure of 3000 psig, the SEC99AB-18 is a drop-in HVAC capillary tube replacement for the SEC99AB-18C, compatible with all common non-corrosive refrigerants across a wide temperature range from -50?F to 350?F. Key Benefits Vibration Resistance: The armored brass sleeve protects the internal copper tube from abrasion and stress fractures caused by reciprocating compressors. Elimination of Effusion: Precision manufacturing ensures no refrigerant effusion through the capillary walls, maintaining system charge integrity. Enhanced Connectivity: Features Schrader valve depressors on both the straight and 90-degree flare nuts for rapid service port attachment. Universal Compatibility: Designed for use with PENN refrigeration controls and compatible with R-410A, R-22, R-134a, and other standard refrigerants. Common Questions Is the SEC99AB-18 compatible with high-pressure refrigerants? Yes, this armored capillary is rated for an operating pressure up to 690 psi, making it suitable for modern high-pressure systems. Can this be used with corrosive refrigerants? No, since the internal tubing is copper and the fittings are brass, it should only be used with non-corrosive refrigerants; avoid ammonia applications. What is the difference between the SEC99AB-18 and SEC99AB-18C? These two part numbers are technically identical in specifications, materials, and fitting type; they can be used interchangeably in the field. 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.
