German LOHSE seals LOHSE models LOHSE prices

LOHSE seals are the customary term for general seals, simply referring to lubricating oil seals. They are mechanical components used to seal grease (oil is the most common liquid in transmission systems, and also refers to general liquids), isolating lubricated parts from output parts in transmission components to prevent lubricating oil leakage. Seals used for static sealing and dynamic sealing (generally reciprocating motion) are called oil seals. The representative form of oil seals is the TC oil seal, which is a double-lip oil seal with a self-tightening spring fully covered by rubber. The term oil seal generally refers to this type of tc skeleton oil seal.

LOHSE seal advantages

1) The oil seal structure is simple and easy to manufacture. Simple oil seals can be molded in one step; even the most complex oil seals do not have complicated manufacturing processes. Metal skeleton oil seals only require stamping, bonding, inlaying, and molding to combine metal and rubber into the required oil seal. 2) Oil seals are lightweight and consume less material. Each oil seal is a combination of thin-walled metal and rubber parts, consuming very little material, so each oil seal is very light. 3) The installation position of the oil seal is small, with small axial dimensions, easy to process, and makes the machine compact. 4) Oil seals have good sealing performance and a long service life. They have certain adaptability to machine vibration and spindle eccentricity. 5) Oil seals are easy to disassemble and convenient to inspect. 6) Oil seals are inexpensive.

LOHSE seal precautions

1) Preparation and precautions before startup: a. Comprehensively check whether the mechanical seal, auxiliary devices, and pipeline installations are complete and comply with technical requirements. b. Conduct a static pressure test before starting the mechanical seal to check for leakage. If there is significant leakage, identify the cause and eliminate it. If still ineffective, disassemble, inspect, and reinstall. Generally, the static pressure test pressure is 2~3 kg/cm². c. Rotate the pump according to its direction to check if it is light and uniform. If rotation is difficult or stuck, check if assembly dimensions are incorrect or installation is unreasonable. 2) Installation and shutdown: a. Keep the seal chamber filled with liquid before startup. When transporting solidifying media, use steam to heat the seal chamber to melt the medium. Must rotate the pump before startup to prevent sudden startup from causing soft ring breakage. b. For mechanical seals using an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. c. After stopping a hot oil pump, do not immediately stop the cooling water for the seal oil chamber and face seal. Wait until the oil temperature at the face seal drops below 80 degrees before stopping the cooling water to avoid damaging seal parts. 3) Operation: a. If slight leakage occurs after pump startup, observe for a period. If continuous operation for 4 hours does not reduce leakage, stop the pump for inspection. b. Pump operating pressure should be stable, with pressure fluctuations not exceeding 1 kg/cm². c. During pump operation, avoid cavitation to prevent dry friction and seal damage. d. Frequently check sealing conditions. During operation, if leakage exceeds standards (heavy oil not more than 5 drops/min, light oil not more than 10/min), and if there is no improvement within 2-3 days, stop the pump to inspect the sealing device.

LOHSE seal precautions

1). Before designing grooves, carefully read the product descriptions for each series to distinguish whether the product uses an integral groove or a split groove; during seal installation, avoid sharp edges; installing bore seals into integral grooves requires installation tools; designers must consider groove dimensional accuracy, surface roughness, extrusion gap, and other parameters; refer to product instructions, diagrams, and dimension tables for details. 2). Before installing seals, ensure there are no impurities or cracks in the seal groove; apply operating oil to the seal groove and seal surface respectively; install seals gradually in order; avoid sharp edges during installation, align the seal properly, and avoid twisting and skewing; if it is a split groove, tighten the pressure cover last.

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