fabricreinforceddiaphragm.cn Rubber diaphragm|Structure

The Structure of aRubber diaphragm
The patented structured diaphragm makes it possible to significantly reduce the size for a given performance. Diaphragm pumps for compressing and evaluating gases can be classified by the type of diaphragm they employ. It is the diaphragm that determines the performance of the pump. KNF Neuberger’s development of the patented structured diaphragm can only be described as precision design.
With aRubber diaphragmseparating the compression chamber from the mechanical parts and operating practically without friction, diaphragm pumps are completely oil-free. This makes them suitable for applications for which oil-lubricated pumps could not even be considered.
Diaphragm Pump Advantages
Apart from the wide range of potential uses, theRubber diaphragmpump offers further advantages over oil-lubricated pumps. First of all there is the low maintenance requirement. Not only are oil changes not required, but also the simple design and small number of parts, reduce the need for maintenance. At the same time the simple design ensures high reliability. In addition the hermetically sealed compression chamber prevents losses of the gases or liquids being handled, and makes compression and evacuation of expensive, toxic inflammable, radio-active, or otherwise dangerous gases possible. Currently rubber diaphragms can be divided into three groups:
The Flat Diaphragm
The simplest type ofRubber diaphragm? the flat diaphragm - consists of a flat rubber plate. It is clamped art its edge between the crankcase and the pump head, and at its center to a rigid metal disc.
A connecting rod imparts movement to the diaphragm. Depending on the expected duty, the diaphragm hay have reinforcing fabric vulcanized into it to carry the forces arising from pressure created in the gas.
The disadvantages of the flatRubber diaphragmlie in the metal clamping disc and screw head, which are of necessity situated in the compression chamber. Applications with corrosive or aggressive gases demand a better solution.
Especially in the vacuum field a flat diaphragm is not the optimum solution. At top dead center, the clamp disc and its fastening give rise to gaps and recesses that increase the dead volume, so reducing the volumetric efficiency of the pump. These limitations of the flat diaphragm led to the development of the molded diaphragm.