German Staubli seals, Staubli models, Staubli prices

Staubli seals are a typical representative of oil seals; the term "oil seal" generally refers to skeleton oil seals. The function of an oil seal is generally to isolate components requiring lubrication within transmission parts from the external environment, preventing lubricating oil leakage. The skeleton acts like rebar in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. According to structural form, they can be divided into single-lip skeleton oil seals and double-lip skeleton oil seals. The secondary lip of a double-lip skeleton oil seal serves a dust-proof function, preventing external dust, impurities, etc., from entering the machine interior. According to skeleton type, they can be divided into internally enclosed skeleton oil seals, externally exposed skeleton oil seals, and assembled oil seals. According to operating conditions, they can be divided into rotating skeleton oil seals and reciprocating skeleton oil seals. Used for gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, axles, and other locations.

Staubli seal features

1) No need to measure the seal working length during installation; 2) The shaft can be adjusted at any time; 3) Leakage during startup will not occur because the seal has been pre-tested; 4) During installation, only the bolts tightening the seal cover need to be fitted, making assembly quality easy to ensure; 5) Protects the sealing surface from contamination by debris or damage due to operational errors before installation or startup; 6) Can be readjusted after thermal expansion of the machinery; 7) Self-centering through fit; 8) Easy to remove the seal for cleaning and inspection without disassembling the pump equipment. The API682 standard recommends cartridge mechanical seals for all mechanical seals.

Staubli seal startup preparation

1) Comprehensively check whether the mechanical seal, auxiliary devices, and pipeline installations are complete and comply with technical requirements. 2) Perform 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 for inspection and reinstall. Generally, the static test pressure is 2~3 kg/cm². 3) Rotate the pump according to its direction of rotation to check if it is light and uniform. If rotation is difficult or immobile, check whether assembly dimensions are incorrect or installation is unreasonable.

Staubli seal specifications and applications

1) Standard single-lip type: Generally used for sealing mineral oil, water, and other media on high/low-speed rotating shafts and reciprocating motion. Standard oil seals are used in environments with less dust and impurities, resistant to medium pressure<0.05MPa, maximum linear speed 15m/s, reciprocating motion speed<0.1m/s. 2) Standard double-lip type: In addition to the usage characteristics of the above-mentioned S type oil seals, it also provides dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to medium pressure<0.05MPa, linear speed ≤15m/s. 3) Springless type: Springless single-lip internally enclosed skeleton rubber oil seal. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤6m/s. 4) External skeleton single-lip type: Single-lip externally exposed skeleton rubber oil seal with spring, featuring a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with less dust and impurities, resistant to medium pressure<0.05MPa. For cases where the rotating shaft linear speed ≤15m/s. 5) External skeleton double-lip type: Double-lip externally exposed skeleton rubber oil seal with a secondary lip, featuring a thin waist, good followability, high rigidity, and good coaxiality. Standard oil seals with a dust lip can prevent dust ingress, resistant to medium pressure<0.05MPa. Rotational speed ≤15m/s. 6) Assembled single-lip type: External skeleton oil seal formed by assembling inner and outer skeletons with rolled edges, featuring high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, medium pressure ≤0.05MPa, maximum linear speed ≤15m/s. 7) Unidirectional return flow type (right-hand/left-hand rotation): Angled ribs are manufactured on the air side of the lip, utilizing fluid dynamics principles to generate a unidirectional pumping action with a return flow effect. Related to the shaft's direction of rotation, the radial force is smaller than that of standard oil seals due to the return flow effect, reducing wear and heat generation, extending service life, suitable for medium pressure<0.05MPa, rotational speed ≤20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance, working pressure ≤3MPa. Suitable for applications with medium pressure ≤3MPa, suitable for shaft end oil seals of high-pressure pumps; generally, the PV value ≤8. Rotating shaft linear speed ≤15m/s.

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