Cast steel gate valves have a spare parts called the valve stem, the stem should be how to choose? And what are the considerations? Common gate valve stem and easy accumulation of welding slag, stones, sediment, etc, is not conducive to seal and the surface of the flow, and part of the manufacturer of the elastic base seat of the sealing valve adopts flat type cut-through design, whole basin is not easy to pile up sundry, ensure reliable sealing, can make clear fluid. Is actually we often go to the valve accessories on the market to buy the valve stem, the standard is better, can batch production, the basic data and has a reference to the size of the standard, if the wrong target words will also customize, another important thing is: cast steel gate valve stem is a material difference between the two, the small accessories have now been many manufacturers as a 'fudge' places, to maximize their own interests, or to a customer, the price, it is usually, valve is 304, but the stem is 321 or worse, other buyers also seldom go to care about the small accessories, it also has caused many wussy boss, how also think impassability, why you do a valve 304 to 28 block, can sell some manufacturers to $26. If you don't have too big effect also good, this is also a kind of small sales skills, but still hope do not disturb the whole Industrial Valves sales market.
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