[Science stickers] Diaphragm valve installation, maintenance and troubleshooting

Diaphragm valve characteristics

Diaphragm valve is a special form of shut-off valve. Compared with other valves, it has the following characteristics:

1. The elastically sealed opening and closing parts ensure that there is no internal leakage;
2．The streamlined flow channel makes the pressure loss small;
3．There is no packing, so there is no leakage;
4．The valve body and the cover are separated by an intermediate separator, so that the upper diaphragm valve cover, valve rod parts from the erosion of media;
5. The diaphragm can be replaced and the maintenance cost is low;
6．The variety of lining materials can be applied to various media and has good corrosion resistance. 

Diaphragm valve installation and maintenance

1. Before installation, carefully check whether the operating conditions of the pipeline are consistent with the scope of application specified by this valve, and clean the inner cavity to prevent dirt from jamming or damaging the sealing parts.
2. Do not paint grease or oil on the surface of the rubber lining laminated rubber diaphragm to prevent the rubber from swelling and affecting the service life of the valve.
3. Do not tie clues to the handwheel or valve stem to lift the valve during installation.
4. When manually operating the valve, do not use auxiliary levers to prevent excessive torque from damaging the drive components or sealing parts.
5. Valves should be stored in a dry and ventilated room. Stacking is strictly prohibited. The passages at both ends of the inventory valve must be sealed, and the opening and closing parts should be in a slightly open state.

Failure and elimination

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