Those things about silicone rubber diaphragms


The functions of the diaphragm are: suction, isolation, […]

The functions of the diaphragm are: suction, isolation, pressure/flow regulation, drive, regulation, shock absorption/buffering, measurement (instrument), etc. It is used in pumps and valves, pneumatic components, pneumatic and hydraulic pressure, gas equipment, electrical equipment, and automobile industry. There are applications in fields such as pressure reducing/pressure regulating/relief valve diaphragms, control valve diaphragms, vacuum pump diaphragms, carburetor diaphragms, metering pump diaphragms.. water pumps, air pumps, solenoid valves, Silicone rubber diaphragms are used in coffee machines, sprayers, steam cleaners, etc.
Common shapes include round, square, and irregular shapes.
Silicone rubber diaphragms can be divided into three categories: pure rubber type, cloth type (intermediate or unilateral cloth), and rubber metal parts and cloth mixed type. The role of cloth cloth is to strengthen the performance of the diaphragm. For example, in high-pressure operation, the diaphragm is often required to have strong tear resistance, while in low-pressure operation, it is often not necessary to clamp the diaphragm.
Common cloth materials are: nylon, cotton canvas, stretch fabric, polyester fabric, etc.
The most basic thing to ensure the quality of silicone rubber diaphragm is the material. According to different use environments, there are often different requirements for the material.
According to the different media contacted during work, the required materials are also different. Common ones are EPDM, silica gel, fluorine rubber, butadiene nitrile rubber, etc., and they must be customized according to the use environment to achieve flexibility, Permeation resistance, high pressure resistance, corrosion resistance, tear resistance, good stability, long life, oil resistance, acid and alkali resistance, high and low temperature resistance, ozone resistance and other performance requirements.
Finally, let’s talk about the design. When designing the product, we must consider the working environment, the pressure during the operation, the working frequency, and the role it plays. When designing the mold, pay special attention to sharp edges and burrs, because these will cause the diaphragm to pass Early damage, so the mold surface must be smooth and not rough

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