1. PVC (UPVC, RPVC, PVC-U) 1. The best mold temperature is 40℃. The shrinkage rate of coarse powder is 0.1~0.5%, and the shrinkage rate of fine powder is 1.5%. 2. After 24 hours at room temperature, absorb 0.02% of water. If necessary, bake at 65℃/3...

1. What is the relationship between the two?    The flow rate and flow rate of the valve mainly depend on the diameter of the valve, and it is also related to the resistance of the valve structure to the medium. At the same time, it has a certain in...

Water pipe insulation can improve the efficiency and performance of the piping system and reduce the loss of thermal effects. For areas prone to pipeline freezing, the insulation of the pipeline is the most necessary to do. If this happens, the labor...

Pipes made of high-density polyethylene (codes PE3408 and PE3608) are mainly used in industrial and municipal applications, and they are used in mains, sewers, and storm drains. The pipeline is buried deep in the ditch and must withstand the high pre...

At present, many engineering plastics have been successfully applied to mechanical parts and have achieved good results. However, the difficulty of injection molding of engineering plastics is relatively large, especially mold fouling is prone to occ...

A common question about air compressors is: "Which type of pipe fittings series should an air compressor use?" The following are the most common options:   1-PVC pipe PVC pipes are usually used, but they are not recommended for use with compressed ai...

The significance of choosing the correct valve In the fluid piping system, the valve is the control element, and its main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and drain the pressure. T...

Pipe flange is a bridge used to establish a connection between two pipes. It can be used to dismantle the piping system, temporary or mobile installation, transition between dissimilar materials and to connect in an environment that is not conducive ...

In order to welcome the upcoming nineteenth national "Safety Production Month", to further strengthen the company’s awareness of fire safety, and to effectively improve employees’ awareness of life safety and the ability to deal with fires, Kaixin Pi...

The narrative of the compartment    "Personal information: Name: Diaphragm Valve Age: 0.3 years old Hometown: Ningbo, Zhejiang Expertise: Cut off, adjust, and divert media Address: No. 539, Bohai Road, Beilun District   Self introduction: Hello ever...

1. Why should the outlet valve be closed when the centrifugal pump is started?   When the centrifugal water pump is started, there is still no water in the outlet pipe of the pump, so there is no pipe resistance and resistance to lifting height. Af...

"Know yourself and the enemy, never end in battle" The prerequisite for the correct selection and use of valves is a comprehensive and specific understanding of the advantages and disadvantages of each valve and the physical properties (temperature,...