{"product_id":"castair-refrigerated-dryer-rdd40-o-ring-gasket-kit-rdd40-ogk","title":"Castair Refrigerated Dryer RDD40 O-Ring Gasket Kit - RDD40-OGK","description":"\u003cp\u003eThe Castair RDD40-OGK is the O-ring and gasket kit for the RDD40 refrigerated compressed air dryer. When your RDD40 starts leaking at connection points, around drain fittings, or at heat exchanger seals, the problem is almost always worn or cracked O-rings and gaskets rather than a failed unit. This kit gives you the correct seals specific to the RDD40 so you can restore a leak-free seal without hunting down generic hardware store parts that may not be the right material or durometer for refrigeration service.\u003c\/p\u003e\n\n\u003cp\u003eThis is a service part. If you are performing scheduled maintenance on an RDD40 dryer — particularly after refrigerant service, drain valve replacement, or heat exchanger service — replacing the O-rings and gaskets at the same time costs very little and prevents a callback. If you are sourcing this for a repair, have your dryer serial number and unit age available when you call, as seals degrade faster in high-temperature or high-humidity environments.\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Kit Covers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-ring set:\u003c\/strong\u003e Replacement O-rings for the RDD40 refrigerated dryer — specific to this model\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket set:\u003c\/strong\u003e Replacement gaskets for drain connections, heat exchanger access points, and service ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Castair RDD40 refrigerated compressed air dryer series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: This kit is designed specifically for the RDD40 model. It is not compatible with other Castair dryer models (RDD50, RDD80, RD25-6K, RD59-11K, RD71-15K, or others) without confirming fitment. Call 866-217-0063 to confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhen You Need This Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAir or refrigerant leaks detected at connection points or service ports on the RDD40\u003c\/li\u003e\n\u003cli\u003eScheduled preventive maintenance — recommended any time the dryer is opened for service\u003c\/li\u003e\n\u003cli\u003eAfter refrigerant recharge or drain valve replacement\u003c\/li\u003e\n\u003cli\u003eAny time seals show visible cracking, compression set, or deformation on inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eO-ring set for Castair RDD40 refrigerated dryer (model-specific)\u003c\/li\u003e\n\u003cli\u003eGasket set for Castair RDD40 refrigerated dryer (model-specific)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Detailed contents list varies by kit revision. Full contents are confirmed by the kit part number RDD40-OGK. Contact us for complete contents if needed before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Equipment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRDD40 series:\u003c\/strong\u003e Castair RDD40.016, RDD40.030, RDD40.060, and related RDD40 variant dryers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible with:\u003c\/strong\u003e RDD50, RDD80, or the RD-series dryers (RD25-6K, RD59-11K, RD71-15K) without confirmed fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e RDD40-OGK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Cast Air, Inc.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Castair RDD40 refrigerated compressed air dryer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Type:\u003c\/strong\u003e O-ring and gasket service kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Contact us for specific O-ring material specification — important for refrigerant compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe specialize in Castair compressed air equipment and service parts. We can confirm kit compatibility with your specific RDD40 unit before you order — important if you are not sure which sub-variant of the RDD40 you have. Free shipping on qualifying orders, free pre-sale technical support, and genuine Castair parts with full manufacturer warranty.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342590206165,"sku":"RDD40-OGK","price":66.74,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-refrigerated-dryer-rdd40-o-ring-gasket-kit-rdd40-ogk","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}