How to choose high quality butterfly valve
A lot of friends in the process of selecting butterfly valve have such and such questions, why the supplier offer is very different, what is the reason for the difference in price?
Sealing is the only test, can achieve the perfect tightness, depending on the valve material, processing technology, design process and the use of the working conditions.Three eccentric bidirectional metal hard seal butterfly valve sealing material and seal leakage grade are the index parameters to identify the valve, the valve is not good or bad, special working conditions can be used for a long time may not be used long problems, so can not be judged by good or bad, to use comprehensive working conditions.
Butterfly valve: butterfly valve opening and closing parts are a disc shaped disc, in the body around its own axis rotation, so as to achieve the opening and closing or adjustment of the valve.Butterfly valve full open to full close is usually less than 90 degrees, butterfly valve and butterfly rod itself do not have self-locking ability, in order to butterfly plate positioning, to install worm gear reducer on the valve stem, the use of worm gear reducer can not only make butterfly plate has self-locking ability, so that butterfly plate stop in any position can also improve the operating performance of the valve.
Industry special butterfly valve features high temperature resistance, pressure range is also higher, the valve nominal diameter is large, the body is made of carbon steel, the valve plate seal ring USES metal ring instead of rubber ring.Large high temperature butterfly valve is made by welding steel plate, which is mainly used for smoke duct and gas pipeline of high temperature medium.
Butterfly valve bought back, how to detect good or bad?
Firstly, the sealing surface of the butterfly valve was observed. The surface of the sealing surface was smooth without burr, indicating that the butterfly valve was properly machined.Second, the detection of butterfly valve sealing performance, sealing is an important indicator to detect the butterfly valve.Seal, the butterfly valve material, design and processing technology, the use of the working conditions are consistent.
The real impact of the butterfly valve is the manufacturing process.Usually the butterfly valve before the factory will be strictly tested, we can determine the quality of the butterfly valve by its factory inspection results.
Butterfly valve in addition to its own quality, there is a very important judgment standard, is the use of the operating environment.If the working condition is special, the valve is not suitable, even if the quality is very good valve may be broken in a short time.So the butterfly valve is not only good or bad with the quality of the valve and the length of time to determine the use of suitable for their own conditions is important.
A good butterfly valve product should have two elements, one is their own brand, and the other is a reputable manufacturer.In addition, as a purchaser, also want to learn some knowledge of butterfly valve, have the ability to simply judge the butterfly valve from the material, product phase of the intuitive ability.
How to judge the butterfly valve quality?
First of all, we must choose the butterfly valve according to the working condition, which kind of structure, which kind of drive, what kind of material and so on, this is the first step to ensure the quality of the butterfly valve, if the purchase of improper, even if the quality of the valve is good in the incorrect working condition environment, will be damaged.Come over after butterfly valve selection close, how to detect good or bad?Firstly, the sealing surface of the butterfly valve was observed. The surface of the sealing surface was smooth without burr, indicating that the butterfly valve was properly machined.Second, the detection of butterfly valve sealing performance, sealing is an important indicator to detect the butterfly valve.Perfect seal, the butterfly valve material, design and processing technology, the use of the working conditions are perfect fit.Regular maintenance and maintenance of the butterfly valve can extend the service life of the butterfly valve.