While some traditional factors are still very important, but they only valve brass ball valve emphasis on the "static" performance. In fact they are the "table" on the valve to measure the results obtained, but such a result it is difficult to valves in the actual operation conditions will show what kind of performance. The traditional theory is that static factors carefully regulating valve will (and thus the entire loop) was a good performance. However, now we realize that this is not always the case.
Researchers and manufacturers to check the thousands of properties that, up to 50 percent of the valves used in (many of which are considered by the traditional factors of choice) to optimize the control loop performance failed to produce such a great effect. Follow-up study shows that valve to the dynamic nature of the process to reduce volatility played an important role. In many of the key processes in different valves to reduce the rate of flow volatility even if the difference one percent can significantly increase productivity and reduce waste, which can be achieved over 1 million U.S. dollars in economic benefits. It is clear that the economic benefits of this so that we can negate the traditional approach, that is only based on the initial purchase price valve to decide whether to buy.
Secondly, the traditional view is always that the process is brass ball valve always to improve optimization of control from the control room instrumentation upgrade. However, the test data show that in using the same control instrument conditions, the valve to the dynamic nature of the circuit have a significant impact. If the control valve can only reach five percent accuracy, then spend a lot of money to a configuration of its control accuracy can be achieved 0.5% of the senior control instrumentation systems and can not play much role.
In looking for a match with the Use of the valve, should first look at the four basic types of expenditure control valve, cage-ball valve, rotating floating ball valve, valve and eccentric butterfly valve.
Cage-valve adjustment-a very wide variety of forms, the majority of applications to meet the demand, so that it has become the valve of choice. Cage-valve adjustment-there are many, including balance-adjusted, non-balance adjustment films, flexible seat-adjustment, the adjustment to be bound-and-such as full-size adjustments. In many cases, a valve-adjustment of the various configurations can be interchangeable.
Cage-ball valve has a number of shortcomings. First, the limited size of the valve (usually 16 inches) and the other is the line of sight with the same specifications valve (if Floating ball valve or butterfly valve) compared to its capacity is relatively low; Third, the higher price, especially Large-diameter cage-ball brass ball valve valve. However, in the process reduce volatility, the cage-ball valve has excellent performance, often