How to maintain and prolong the service life of the pneumatic diaphragm pump, the Department of KeYu machinery for you to do a simple introduction.

One, the seal flushing of pneumatic diaphragm pump

Washing is one of the most effective measures to control the temperature and prolong the seal life of the pneumatic diaphragm pump. The purpose of flushing is to take away the heat, reduce the temperature of the sealing chamber, prevent the vaporization of the liquid film, improve the lubrication conditions, prevent dry running, prevent impurity accumulation and air bag formation. Flushing is actually a direct cooling method. It has several kinds of direct flushing, reverse flushing, full flushing and comprehensive flushing. The sources of the flushing fluid include internal flushing and external flushing. One point flushing and multi point flushing are arranged according to the layout of the flushing population.  

1. positive washing when the medium temperature at 0 ~ 80 DEG C, positive flushing is usually used flushing cooling, it is the most commonly used method, and is divided into self flushing type and external flushing type two.  

2. return reverse flushing pump pressure from the lower sealing medium leads to seal cavity (usually at the pump, the use of population) sealing medium itself flushing seal cavity. This method is often used in cases where the difference between sealing pressure and discharge pressure is very small.  

3. from flushing pump high pressure side (pump) lead sealing medium, and flushing out from the low pressure side of the seal cavity of the pump the medium return. This kind of washing is also called through flushing.  

4. to two for flushing double support pump can be used two to rinse, outlet seal chamber pressure is higher than the population of the sealing pressure of sealed ends connected to the pump chamber, the outlet is reverse flushing pump, the population end is positive flushing, so called two to wash.

Two. The seal cooling of pneumatic diaphragm pump

The purpose of cooling is to heat and cool down, and the way of cooling has direct cooling and indirect cooling. The essence is a kind of direct cooling and indirect cooling effect to be worse than the direct cooling, but not high requirements for cooling liquid, method of indirect cooling jackets, sealing gland cavity jacket, static ring jacket. The back cooling is a cooling way that directly cooled the static ring from the back of the static ring by means of coolant (water, oil, etc.), and its cooling effect is good. It can directly and rapidly cool the back of the static ring, which is also called quench, which is usually combined with the washing way.

Three, pneumatic diaphragm pump sealing function, significance and status to improve the efficiency of the machine and reduce energy consumption. Reduce friction loss, change the way of sealing, change the system, safety and environmental protection. Although the sealing technology is not the leading technology, but the decisive technology, although the seal is not large, it is only a component, but it determines the safety and reliability of the machine. The pneumatic diaphragm pump is sealed in the maintenance of daily equipment for 60% of the workload. More than 86% of the petrochemical process equipment is sealed by pneumatic diaphragm pump. With the development of sealing technology, the pneumatic diaphragm pump seal of the pump occupies a more important position.