Each valve has a DC project are six kinds of running, were grounded, outage, standby, lockout, unlock and load boost. Control system through the inverter, circuit breakers, isolating switches and other equipment in the order control, to achieve conversion valve running operation.
2014年1月13日星期一
Ball has been used as a cutting device used in high temperature and high pressure piping conditions
Since the development of materials and manufacturing technology, pipeline ball valves have been used as a cutting device used in high temperature and pressure conditions. Production of high temperature and pressure valve metal seal valve in supercritical thermal power units are used, replacing the original cut-off valve and the valve, its bubble-tight performance and longer life than traditional globe valves and gate valves. High parameters and high-performance steel ball valve body has not meet the requirements, so a better toughness, higher reliability of forged steel body is very necessary. Structural design forged steel ball valve
Stainless steel needle valve valve body design first thing to consider forging process, namely the forging process less than a block, a small margin, shape and size close to finished parts, material utilization. Consider the economy, as far as
High pressure ball valve process of forging equipment, forging equipment because of the large and special use fee is high, while the cost of mold manufacture and use is also more expensive. Forged steel ball valve has two and three-piece. Two-piece body structure more suitable for forging, the body needs to squeeze in a closed die forging, large deformation force requirements, require large forging equipment.
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