1. Features of the cast steel gate valve
The cast steel gate valve has low fluid resistance, and the sealing surface is less eroded by the medium, with easy opening and closing. The flow direction of the medium is not restricted, the flow is not disturbed, and the pressure is not reduced. The structure is simple, the length of the structure is short, the manufacturing process is good, there are many optional materials for high temperature and high-pressure resistance, and the scope of application is wide.
2. The stem of the cast steel gate valve
The cast steel gate valve has a part called the stem. How to select the stem of this cast steel gate valve? What are the precautions? Let’s take a look.
The common cast steel gate valve stem is easy to accumulate debris such as welding slag, stones, sediment, etc., which is not conducive to sealing and circulation. Moreover, the elastic seat gate valve of some manufacturers adopts a flat-bottomed full-basin straight-through design, which is not easy to accumulate debris and make sure the seal is reliable so that the fluid can flow unobstructed.
In fact, we can buy the standard stem from the valve accessories market, which is mass-produced and has a reference standard for basic data and size. If it is non-standard, it must be customized separately. Another important thing is that the stem of the cast steel gate valve is also different in material. This small accessory has now been competed by many manufacturers, in order to maximize their own interests or to win a customer to reduce the price.
The usual method is that the valve is made of 304 stainless steel, but the valve stem is 321 or worse. Buyers rarely care about this small accessory, which also leads to many manufacturers being confused that why their 304 valve costs 28 yuan while other valves are s it for only 26 yuan.It would be okay if it doesn’t affect too much. It is also a sales skill, but we still hope that it will not disrupt the sales market of the entire valve.
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ZECO VALVE GROUP CO., LTD. has developed its own laboratory for research and development of international standard valve design innovation and verification, including PT, MTUT, FE testing. ZECO is a humble and united team. We are diligent and enterprising, showing integrity to customers. If you have any needs, please feel free to consult us.