German chetra seals chetra model chetra price

chetra seals are a type of friction seal or stuffing box used to prevent liquid leakage between the shaft and bearing of compressors or other fluid handling equipment. They are also sealing devices installed to prevent leakage at the pump shaft and housing. Common types of shaft seals include packing seals, mechanical seals, and power seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly consist of packing seals, mechanical seals, and power seals.

chetra seal construction

The framework oil seal structure consists of three parts: the seal body, the reinforcing frame, and the self-tightening spiral spring. The seal body is divided into different parts such as the bottom, waist, cutting edge, and sealing lip. Typically, in its free state, the inner diameter of a framework oil seal is smaller than the shaft diameter, meaning it has a certain amount of "interference fit." Therefore, after the oil seal is installed on the seal seat and shaft, the pressure from the oil seal's cutting edge and the contraction force of the self-tightening spiral spring create a certain radial clamping force on the shaft. After some time in operation, this pressure will quickly decrease or even disappear, so the spring can continuously compensate for the oil seal's self-tightening force.

chetra seal usage guide

1) When the gearbox lubricating oil volume is ≤7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals that are not temporarily used should be properly stored to prevent contamination with oil stains, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the new oil seal lip contact pressure with the shaft to drop and fail to seal oil, the issue can be remedied by shifting the position.

chetra seal troubleshooting

1) The main factors causing oil seal leaks: Poor sealing of the oil seal is the primary cause of oil leaks. When the shaft wears and forms grooves, even replacing with a new oil seal may not achieve proper sealing due to decreased contact pressure between the oil seal lip and the shaft, resulting in insufficient interference fit between the installed oil seal lip diameter and the shaft diameter. Taking the S195 diesel engine crankshaft oil seal as an example, the main reasons for poor sealing are analyzed as follows: (1) poor manufacturing quality of the oil seal; (2) poor quality of the shaft or bearing; (3) improper use and maintenance; (4) improper installation; (5) improper storage, leading to adverse effects from environmental pollution. 2) Countermeasures for oil seal leaks due to poor sealing: Acquire basic knowledge to identify counterfeit products and purchase high-quality, standard-compliant oil seals. During installation, if the outer surface roughness of the shaft diameter is low or there are defects such as rust spots, corrosion, or burrs, polish them smooth using fine sandpaper or an oil stone. Apply clean engine oil or lubricating grease to the oil seal lip or corresponding positions on the shaft diameter. Apply sealant to the outer ring of the oil seal, wrap the keyway area on the shaft with hard paper to avoid scratching the oil seal lip, and use specialized tools to rotate and press the oil seal inward. Never forcefully hammer or push it, as this could deform the oil seal or break the spring, rendering it ineffective. If the lip flips, the spring falls off, or the oil seal becomes misaligned, it must be removed and reinstalled. Note: Do not arbitrarily tighten the inner spring when the shaft diameter is not worn and the oil seal spring tension is sufficient. Oil seals used in machinery generally operate under harsh conditions, with large temperature differences, abundant dust, and frequent vibrations that constantly change the stress on components. Regular inspection, maintenance, and upkeep are required. If the shaft diameter and bearing are severely worn, or if the oil seal rubber ages or the spring fails, promptly repair and replace the corresponding components. Address abnormal heating of components or assemblies immediately. Avoid overspeeding or overloading the machinery to prevent increased temperatures at the oil seal lip, rubber aging, and premature wear of the lip. Frequently check the engine oil level. If the oil contains excessive impurities, such as alloy powder or metal shavings, completely replace it with new oil. Ensure the brand and quality of the replacement oil meet seasonal requirements. It is recommended to add Metraile Super Sealant & Lubricant to the engine oil. This excellent gearbox additive forms an inert material film on components, reducing oil seal leakage, extending the service life of oil seal gears, and lowering gearbox noise. The use of Metraile Super Sealant & Lubricant does not contaminate or degrade the oil.

Weidou Intelligent Technology specializes in selling German chetra seals, chetra O-rings, chetra sealing strips, chetra pipe seals, chetra cable seals, chetra rubber seals, chetra mechanical seals, chetra gaskets, chetra oil seals, chetra shaft seals, chetra metal seals, chetra high-pressure seals, chetra spiral seals, chetra centrifugal seals, chetra sealing rings, chetra original imports from Germany. We welcome inquiries and orders from customers.