German schmalz seals schmalz model schmalz price

schmalz seals are sealing devices installed to prevent leakage between the pump shaft and the 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. 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.

schmalz seal principle

Since there is an oil film controlled by the oil seal lip edge between the oil seal and the shaft, this oil film has fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes the end in contact with air to form a meniscus, preventing leakage of the working medium and thereby achieving sealing of the rotating shaft. The sealing capability of an oil seal depends on the thickness of the oil film on the sealing surface; if the thickness is too great, the oil seal will leak; if the thickness is too small, dry friction may occur, causing wear on the oil seal and shaft; if there is no oil film between the sealing lip and the shaft, it is easy to cause heating and wear. Therefore, during installation, some oil must be applied to the sealing ring, and it must be ensured that the skeleton oil seal is perpendicular to the shaft axis. If not perpendicular, the sealing lip of the oil seal will drain the lubricating oil from the shaft, which will also lead to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant to seep out from within the housing to achieve the formation of an oil film at the sealing surface.

schmalz seal function

The general function of a skeleton oil seal is to isolate components requiring lubrication in transmission parts from output components, preventing lubricating oil from leaking. It is typically used on rotating shafts and is a type of rotating shaft lip seal. The skeleton acts like reinforcing steel in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. Based on the skeleton type, they can be classified into inner skeleton oil seals, outer skeleton oil seals, and exposed inner and outer skeleton oil seals. Skeleton oil seals are made from high-quality nitrile rubber and steel plates, offering stable quality and long service life. They are widely used in automobiles, motorcycle crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other locations. 1) Prevent sand, dust, water vapor, etc., from entering the bearing from the outside; 2) Restrict lubricating oil in the bearing from leaking out. Requirements for oil seals include that dimensions (inner diameter, outer diameter, and thickness) must comply with regulations; appropriate elasticity is required to properly grip the shaft and achieve a sealing effect; they must be heat-resistant, wear-resistant, have good strength, be resistant to media (oil or water, etc.), and have a long service life.

schmalz seal installation and shutdown

1) Before starting, keep the seal chamber filled with liquid. When transporting solidified media, use steam to heat the seal chamber to melt the medium. Manual turning must be performed before starting to prevent sudden startup from causing the soft ring to shatter. 2) For mechanical seals utilizing an external pump 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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