Cast steel gate valve has a valve stem, how should this valve stem choose? What are the precautions? Common gate valve stem and easy accumulation of welding slag, stones, sediment and other debris, is not conducive to sealing and flow surface, and some manufacturers of flexible seat gate valve with flat-bottomed through the valley straight design, not easy to accumulate debris to ensure that Sealed and reliable, can make fluid unimpeded. In fact, we often go to the valve parts to buy the valve above the market, the standard better, you can mass production, basic data and size have a reference standard, if it is non-standard, then it must be customized, there is an important The thing is: the valve stem of cast steel valve also has the material difference, this small accessory has now been used by many manufacturers as a "hands and feet" place, in order to maximize their own interests, or to win a customer, make their own price , The usual approach is to do 304 valves, but the valve stem is 321 or worse, buyers rarely care about this gadget, which also led to a lot of honest boss, why can not figure out why you A valve 304 to be up to 28, and some manufacturers sold only 26 yuan. If not much impact, these are also a small sales skills, but still hope not to disrupt the entire valve sales market.
Weld Neck Flange
Weld Neck flanges are the most popular flange type with a neck extension that has a weld bevel at the end. It is designed to be butt weld directly to the pipe to provide a superior and relatively natural form connection. Weld Neck flanges are the most popular flange type with a neck extension that has a weld bevel at the end. It is designed to be butt weld directly to the pipe to provide a superior and relatively natural form connection. Weld Neck Flanges are flanges that designed to be joined to a piping system by butt welding. The Welding Neck Flange is relatively expensive because of its long neck, but is preferred for high stress applications. The neck, or hub, transmits stresses to the pipe, reducing stress concentrations at the base of the Weld Neck flanges. The bore of the Weld-Neck flange matches the bore of the pipe, reducing turbulence and erosion.
Tapered Hub Flange,High-Hub Flange,Butt Welded Flange
New Century Machinery Co., Ltd , https://www.ncmflange.com