534C0701H04, 534C0701H06 York industrial chiller shaft seals

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The two types of shaft seals used in York industrial refrigeration units, 534C0701H04 and 534C0701H06, as well as the shaft seal kits for York FRICK compressors, are manufactured in the United States. The part number for these kits is 534M0163G05, and they are used in the following refrigeration units produced by York: RWB-II 496, RWB-II 676, RWB-II 856, RWB-II 1080, RWF-II 496, RWF-II 676, and RWF-I. In addition to these units and compressors, they are also used in some other series of refrigeration units equipped with twin-screw compressors whose screw rotor diameter is in the 355 series. The shaft seal for York’s industrial chiller units is a shaft seal kit, which consists of the dynamic ring, static ring, lip seal, pin, positioning ring, O-ring of the shaft seal components, along with specialized installation tools. The compressor shaft seal prevents external gases from entering the compressor housing. This seal consists of a sealing lip that extends outward from the compressor, serving to prevent outside air from getting inside the compressor housing. Precautions for installing the compressor shaft seal kit: When installing, apply a layer of clean machine oil to the surfaces in contact with the seal to ensure smooth installation ； The sealed chamber of the equipment should be kept clean during installation; the sealing components must be cleaned to ensure that the sealing surfaces remain intact, thereby preventing impurities and dust from entering the sealing area ； During installation, it is strictly prohibited to strike or impact the device, to avoid damaging the mechanical seal and resulting in sealing failure ； The radial runout of the equipment’s rotating shaft should be ≤ 0.04 millimeters, and the axial displacement must not exceed 0.1 millimeters ； When installing the static ring gland, the screws must be tightened evenly to ensure that the end face of the static ring is perpendicular to the shaft ； After installation, pushing the moving ring by hand allows it to move freely on the shaft, with a certain degree of flexibility ； After installation, turn the shaft by hand; it should not feel heavier or lighter in any way ； The equipment must be filled with the medium before operation to prevent seal failure due to dry friction ； For crystalline and granular media, when the medium temperature is greater than 80°C, appropriate flushing, filtering, and cooling measures should be taken; for various auxiliary devices, please refer to the relevant standards for mechanical seals. A mechanical seal is a type of shaft seal commonly used in pumps and rotary compressors. It consists mainly of two components: an active ring mounted on the shaft or shaft sleeve, and a static ring mounted on the sealing end cover. The end surface where the rotating ring and the stationary ring come into contact is called the friction pair, while the space enclosed by components such as the rotor shaft, mechanical seal, end cover, and bearing housing is referred to as the sealing chamber. The sealing principle of a mechanical seal is that, when the machine is in operation, oil is injected into the sealing chamber under pressure. The sealing oil that enters the friction pair forms an oil film on the surfaces of the friction pair due to oil pressure, spring force, and high speed. This oil film prevents the working substances inside the machine chamber (such as gases and lubricants) from leaking out through the shaft. A mechanical seal that has only one pair of friction pairs is called a single-face mechanical seal, while one that has two pairs of friction pairs is called a double-face mechanical seal. The most critical aspect of a mechanical seal is the friction pair between the rotating ring and the stationary ring, which is responsible for creating an oil film. This pair of friction pairs requires extremely high precision and is used after being precisely ground and matched together. Its installation is also very important; it is necessary to ensure that the friction pairs fit tightly together in a static state, otherwise it will be difficult to form an effective oil film when the machine is in operation. End jumping is fatal for mechanical seals, as it can break the continuity of the oil film.