The center of rotation of the butterfly plate (that is, the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate. The valve seat is made of synthetic rubber. When closing, th...

Various functions of the valve 01 Cut-off and open medium The flow channel is a straight-through valve, and its flow resistance is small, and it is usually selected as a valve for shut-off and open medium. The downward closing valve (st...

The maximum service temperature of the medium suitable for gray cast iron valve body and bonnet is 250℃. The maximum operating temperature of the medium applicable to the malleable cast iron valve body and bonnet is 300°C. The maximum operating tempe...

Check whether the parts of the whole machine are damaged or loose. For the use of media harmful to human health, strength, sealing, leakage and accuracy tests must be carried out. Clean the pipes and valves before installation to remove impurities an...

Under normal circumstances, industrial valves are not subjected to strength tests when in use, but after repairing the valve body and bonnet or the valve body and bonnet damaged by corrosion, the strength test should be carried out. For safety valves...

1. City gas valves: City gas accounts for 22% of the entire natural gas market. Valves are used in large quantities and have many types. Mainly need ball valve, plug valve, pressure reducing valve, safety valve. 2. Valves for urban heating: In urban ...

1. National standard mark Flanges should be marked according to nominal diameter, nominal pressure, sealing surface form code, matched steel pipe series code (matched with metric pipe code is "series 2", matched with imperial pipe is not marked) and ...

  Monday May 24, 2020​ Today: Another day of knowledge wonderful carry on let us see The advantages and disadvantages of the remaining three valves    NO.3 Globe valve The shut...

1. The bolt is too long For the bolts on the valve, only one or two threads can exceed the nut. The risk of damage or corrosion can be reduced. Why buy a bolt longer than you need? Usually, the bolt is too long because someone does not have time to c...

The water treatment project is a project to purify, soften, disinfect, remove iron, remove manganese, remove heavy metal ions, and filter the water that does not meet the requirements. Simply put, a "water treatment project" is a project that removes...

HELLO ​Hello! Ball valve Those things about ball valves The ball valve is a device used in the pipeline to cut off, distribute and change the flow direction of the medium. In use, it only needs to rotate 90 degrees and a small torque ...

​Five kinds of valves Advantages and disadvantages  There are many types of valves, and each has its own advantages and disadvantages. The following editor lists the advantages and disadvantages of five major valves, I hope it w...