German dichtungstechnik seals dichtungstechnik models dichtungstechnik prices

dichtungstechnik 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 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 include packing seals, mechanical seals, and power seals.

Advantages of dichtungstechnik seals

1) Oil seals have a simple structure and are easy to manufacture. Simple oil seals can be molded in one step; even for the most complex oil seals, the manufacturing process is not complicated. Metal-cased oil seals only require processes such as stamping, bonding, inlaying, and molding to combine metal and rubber into the required oil seal. 2) Oil seals are lightweight and consume little material. Each oil seal is a combination of thin-walled metal and rubber components, consuming very little material, so each oil seal is very light. 3) The installation space for oil seals is small, with small axial dimensions, making them easy to machine and allowing for compact machine design. 4) Oil seals offer good sealing performance and a long service life. They have a certain adaptability to machine vibration and main shaft eccentricity. 5) Oil seals are easy to disassemble and convenient to inspect. 6) Oil seals are inexpensive.

Precautions for dichtungstechnik seals

1) Preparation and precautions before startup: a, comprehensively check whether the mechanical seal, as well as auxiliary devices and pipeline installations, are complete and meet technical requirements. b, perform a static pressure test on the mechanical seal before startup to check for leakage. If there is significant leakage, identify the cause and eliminate it. If this is ineffective, disassemble, inspect, and reinstall. The static pressure test pressure is generally 2~3 kg/cm². c, rotate the pump by hand according to its direction of rotation to check if it moves lightly and evenly. If rotation is difficult or stuck, check for errors in assembly dimensions and reasonable installation. 2) Installation and shutdown: a, keep the seal chamber filled with liquid before startup. When transporting media that solidifies, use steam to heat the seal chamber to melt the media. Manual rotation must be performed before startup to prevent sudden startup from causing the soft ring to shatter. b, for mechanical seals utilizing an external seal oil system, start the seal oil system first. Stop the seal oil system last after shutdown. c, 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 parts. 3) Operation: a, if slight leakage occurs after the pump starts, observe for a period. If the leakage does not decrease after continuous operation for 4 hours, stop the pump for inspection. b, the pump operating pressure should be stable, with pressure fluctuations not exceeding 1 kg/cm². c, avoid cavitation during pump operation to prevent dry friction on the sealing surfaces and seal damage. d, frequently check the sealing condition. During operation, if leakage exceeds the standard (no more than 5 drops/min for heavy oil, no more than 10/min for light oil), and there is no improvement within 2-3 days, stop the pump to inspect the sealing device.

Causes of dichtungstechnik seal failures

Mechanical seal failures are generally identified only after phenomena such as abnormal leakage, abnormal wear, and abnormal torque appear. The causes of failure can be broadly categorized into the following four aspects: 1) Incorrect design and selection of the mechanical seal; 2) Poor quality of the mechanical seal; 3) The precision of the machine using or installing the mechanical seal does not meet requirements; 4) Incorrect machine operation.

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