German bola seals bola models bola prices

bola seals are typical representatives of oil seals; the term "oil seal" generally refers to skeleton oil seals. The function of an oil seal is typically to isolate lubricated components in 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. Based on 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. Based on skeleton type, they can be divided into internally enclosed skeleton oil seals, externally exposed skeleton oil seals, and assembled oil seals. Based on operating conditions, they can be divided into rotating skeleton oil seals and reciprocating skeleton oil seals. Used in locations such as gasoline engine crankshafts, diesel engine crankshafts, gearboxes, differentials, shock absorbers, engines, and axles.

bola seal features

1) No need to measure the seal working length during installation; 2) The shaft can be adjusted at any time; 3) No leakage occurs during startup because the seal has been pre-tested; 4) Installation only requires fitting and tightening the seal cover bolts, 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) Seals can be easily removed for cleaning and inspection without disassembling the pump equipment. The API682 standard recommends cartridge mechanical seals for all mechanical seals.

bola 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 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 moves lightly and evenly. If rotation is difficult or stuck, check for incorrect assembly dimensions or unreasonable installation.

bola seal installation and shutdown

1) Keep the seal chamber filled with liquid before startup. When transporting solidifying media, use steam to heat the seal chamber to melt the medium. Manual rotation must be performed before startup to prevent sudden startup from causing the soft ring to shatter. 2) For mechanical seals utilizing an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. 3) Do not immediately stop the cooling water for the seal oil chamber and face seal after stopping a hot oil pump; wait until the oil temperature at the face seal drops below 80 degrees before stopping the cooling water to avoid damaging seal components.

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