German weidmueller seals weidmueller models weidmueller prices

weidmueller seals are materials or components that prevent leakage of fluids or solid particles between adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage temperature for seals is below 30°C to avoid high-temperature aging. Seals are classified into static seals and dynamic seals. Their main function is to prevent leakage of fluids or solid particles between adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery. Static sealing refers to the tight closure of a sealed chamber, sealed container, or stamps used for sealing documents and wills.

weidmueller seal construction

The skeleton oil seal structure consists of three parts: the seal body, the reinforcing skeleton, and the self-tightening helical spring. The seal body is divided into the bottom, waist, cutting edge, and sealing lip according to different sections. Typically, in the free state, the inner diameter of the skeleton oil seal is smaller than the shaft diameter, meaning it has a certain "interference fit." Therefore, after the oil seal is installed on the seal housing and shaft, the pressure from the seal cutting edge and the contraction force of the self-tightening helical spring exert a certain radial clamping force on the shaft. After a period of operation, this pressure rapidly decreases or even disappears; thus, the spring can continuously compensate for the self-tightening force of the oil seal.

weidmueller seal usage guidelines

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 not in immediate use should be stored properly to prevent contamination with oil, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop and fail to seal oil, a displacement method can be used for compensation.

weidmueller seal installation technical requirements

Mechanical seals are high-precision mechanical components, and their correct installation and operation significantly impact service life. We generally follow the standards prescribed by the Ministry of Petrochemical Industry. The technical requirements for the pump and the mating parts of the mechanical seal are as follows: 1) Shaft bending: maximum not greater than 0.05 mm; 2) Rotor runout: near the shaft sleeve at the rotating ring seal area, not greater than 0.06 mm; 3) Axial shaft movement must not exceed ±0.5 mm; if a shaft sleeve is present, the sleeve must not be loose; 4) Coupling alignment error: for gear couplings, not greater than 0.08～0.10 mm (P2008C); for elastic couplings, not greater than 0.05～0.06 mm; (common practice: face runout<0.05, radial runout<0.10) 5) The concentricity tolerance of the gland (static ring seat) and the sealing spigot relative to the shaft centerline is 0.05 mm; the perpendicularity tolerance of the surface contacting the gasket relative to the centerline is 0.03～0.05 mm. If these requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the rotating ring seal is installed, and the ends of the gland (or housing) where the static ring seal is installed, should be chamfered and smoothed. 7) Exercise care during installation and removal of mechanical seals; strictly prohibit the use of hammers and flat chisels to avoid damaging seal elements. If scale prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used on both ends of the pump, coordinate during assembly and disassembly to avoid neglecting one side while attending to the other. 9) For mechanical seals that have been in operation, if gland loosening causes seal movement, the stationary and rotating ring parts must be replaced and must not be re-tightened for continued use. Because after loosening, the original operating trajectory of the friction pair changes, easily compromising the sealing integrity of the contact surface.

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