Failure Analysis and Improvement of Pump Mechanical Seal
By analyzing the reasons of the frequent failure of the mechanical seal of the lye circulation pump in the ethylene plant, the sealing structure and the friction pair material are improved, and the good sealing effect and economic benefits are achieved. The structure of this type of mould is relatively complex, making it difficult to remove some plastic parts such as caps and closures with detailed threads using standard knock-off methods. After the parts are moulded, they need to be carefully unscrewed from the mould to avoid damaging the threads. With over 15 years of experience in unscrewing moulding, we specialize in Inside Unscrewing Mould, Outside unscrewing mould, and unscrewing mould inside and outside. Therefore, we can design excellent unscrewing moulds to produce various unscrewing products. According to the types of different unscrewing products, we will choose two different demoulding methods: the first one is to use the elastic deformation of the material to forcibly eject the plastic part from the core through the unloading plate when the material allows, which is called Forced demoulding method. The other type is for plastic parts with deeper unscrewing, higher material strength, and higher thread accuracy requirements. We will use the rotational demoulding method. unscrewing injection mold design,auto unscrewing mould,unscrewing injection mould,injection mold unscrewing,Unscrewing Moulds Dongguan Hongke Plastic Precision Mould Co.,Limited , https://www.scientificmolds.com
 Ethylene plant compression system concentrated lye circulation pump is the bottom tower circulating pump caustic tower, it will be cracked gas caustic lye transported to the top of the tower, so that lye recycling. The pump in the actual operation, frequent leaks, mechanical seals in the installation and operation of a week or so began to leak, 1 to 2 months the amount of leakage increased, can not continue to use. Seriously affected the device's environmental standards and long-term stable operation.
   1 Basic situation: The pump is a single suction cantilever horizontal centrifugal pump, the main technical parameters as follows:
   Medium ingredients
   Containing gel, particle impurities 20% NaOH liquid
   Medium temperature