Welcome to ARSS Co., your direct link for fine ammonia refrigeration, new and used parts, and equipment. ARSS Co. has the experience to meet your needs and has been providing the refrigeration industry with installation, sales, and service for 15 years. We offer a variety of USED compressors, condensers, pumps, ice banks, transfer systems, suction traps, receivers, heat exchangers, and evaporators. We handle various Vilter compressor models including the 440-450XL series. Call for availability. Overhauls are an option.