Germany KSB seals KSB model KSB price

KSB seals are devices that prevent fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation that remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, as well as with the cooperation of auxiliary seals. Mechanical seals where the elastic loading mechanism and auxiliary seal are metal bellows are referred to as metal bellows seals. In light-duty seals, rubber bellows are also used as auxiliary seals; since the elastic force of rubber bellows is limited, springs are generally required to supplement the loading force. Mechanical seals are commonly abbreviated as "mech seals".

KSB seals introduction

A mechanical seal is a shaft sealing device for rotating machinery, such as centrifugal pumps, centrifuges, reaction vessels, and compressors. Since the drive shaft passes through the interior and exterior of the equipment, there is a circumferential gap between the shaft and the equipment. The medium inside the equipment leaks outward through this gap; if the pressure inside the equipment is lower than atmospheric pressure, air leaks into the equipment. Therefore, a shaft sealing device is required to prevent leakage. There are many types of shaft seals. Due to advantages such as low leakage and long service life, mechanical seals are the primary shaft sealing method for these equipment worldwide. Mechanical seals are also called face seals. National standards define them as: "a device that prevents fluid leakage, consisting of at least one pair of end faces perpendicular to the axis of rotation that remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, as well as with the cooperation of auxiliary seals."

KSB seals structure composition

1) Main components: rotating ring, stationary ring, cooling device, and compression spring (depending on the specific equipment). 2) Auxiliary sealing elements: O-rings (including O-shape, X-shape, U-type, wedge shape, rectangular flexible graphite, PTFE-covered rubber O rings, etc.). 3) Elastic compensation mechanism: springs, thrust rings, spring seats, keys, or various screws. 4) Classification: single face, double face; balanced, unbalanced; arbitrary rotation direction, fixed rotation direction.

KSB seals installation and shutdown

1) Before startup, keep the seal chamber filled with liquid. When transporting solidifying media, use steam to heat the seal chamber to melt the medium. Manual cranking 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) 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 the seal parts.

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