In the diaphragm metering pump, the reciprocating motion of the plunger is transmitted to the diaphragm through the hydraulic chamber between the plunger and the diaphragm. In order to maintain the normal movement of the diaphragm, the volume of the liquid in the closed space of the hydraulic chamber (usually hydraulic oil) is maintained. constant.
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In the diaphragm metering pump, the reciprocating motion of the plunger is transmitted to the diaphragm through the hydraulic chamber between the plunger and the diaphragm. In order to maintain the normal movement of the diaphragm, the volume of the liquid in the closed space of the hydraulic chamber (usually hydraulic oil) is maintained. No change. This ensures that the volume formed by the movement of the diaphragm is always equal to the stroke volume of the plunger to keep the flow of the pump stable; however, during the actual operation of the pump, leakage will inevitably occur due to the plunger seal, and at the same time There is gas entering the hydraulic chamber. In addition, when the oil is too much or the pressure of the discharge line rises unexpectedly, the volume of the liquid in the hydraulic chamber may be changed, which affects the stability of the flow and reduces the measurement accuracy of the pump. The flow rate of the pump, how to stabilize the metering accuracy of the metering pump, the so-called three-valve device actually refers to a combination of devices or devices including compensation, deflation, safety protection, etc., which are matched by the hydraulic chamber, according to its function The principle is divided into two kinds of three-valve devices: automatic compensation and forced compensation.
The self-compensating three-valve device is widely used in diaphragm-type metering pumps, especially in the case of suction height requirements. The three-valve device consists of three separate sputum (safety valve, bleed valve and Make up valve) composition.
Metering pump other products: plunger metering pump article from: http://NewsDetail275T1.html China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news. Chinawj.com.cn
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