Human use of the valve has a history of nearly 4000 years, China’s ancient salt absorption from salt brine, once in a bamboo pipe used in cork valve; in 1800 BC, the ancient Egyptians in order to prevent the flooding of the Nile and the construction of large-scale water conservancy, distribution has used the similar wooden cock to control the flow of water; these are the prototype of the valve.
Valve is the control part of sewage treatment equipment and fluid transportation system. It has the functions of closing, adjusting, guiding, preventing reverse flow, stabilizing voltage, diverting or overflow and releasing pressure. Below for everyone to introduce sewage treatment equipment valve several common faults :
- Gate and other sealing parts damaged:
The reason is that improper selection of materials or the use of pipes on the valve, often as the use of conditioning valves, high-speed media to form the formation of sealing surface wear. At this point, we will find out the cause of the damage and switch to other materials. In the delivery of high pressure water or impurities in the water more, avoid the use of closed valve as conditioning valve.
- Leaks in the sealing room :
Mainly the most basic selection or loading method is incorrect, stem quality problems. First of all, the appropriate packing should be selected and the packing shall be packed in the sealed chamber by the correct method. In the transport medium temperature of more than 100 degrees, the use of oil filler is not selected, in all the materials, heat resistant selectivity of graphite packing is relatively high.
- Closed tight :
Finishing the body cavity of the dirt, impurities left when the appearance of welding slag, rust, sand or other mechanical work left, it is easy to cause scratches, dents and other defects on the sealing surface, valve failure caused by water treatment equipment. The installation procedure must be strictly observed to ensure the quality of the equipment.
- Valve is widely used, and it has a close relationship with people’s daily life, such as tap water taps, liquefied petroleum gas stove with relief valves are valves. Valves are also indispensable components of various mechanical equipment, such as internal combustion engines, steam engines, compressors, pumps, pneumatic transmission systems, hydraulic transmission systems, vehicles, ships and aircraft.
- If the valve itself is not well produced, the sealing and sealing parts (valve plate and valve seat) will not work closely together, at this time it is necessary to repair or replace. Close the valve when the force is too large, will also cause sewage treatment equipment seal parts damage, operation should be appropriate force.
