Rotary Valve in Petrochemical Plant - rotary valves, control valves - plastic industry

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Straight valve is usually divided into two major categories of programs and rotating. Linear actuator valve through a linear motion components such as the gate to allow or cut off the logistics. Program of the valves straight valve, gate valve, diaphragm valve, etc.. Rotary valve through a rotating components to allow or cut off the logistics. Rotating parts can rotate 90 degrees of rotary valve called the 1 / 4 rotary valve. Sometimes 1 / 4 rotary valve can be extended to the classification of less than 270 degrees of rotation angle valve. By definition you can see, rotary valve is a rotating bezel by rotating parts, such as 90 degrees to the valve open position change from the rotary valve to the off position. Rotary valve generally has the following characteristics.

HC plastic mesh Control valve actuators in the process industries as the production process has always played a very important role in the performance of control valves directly affect the production process and the failure rate, even normal production. With the technology and control technology, process industry Economy Increasing the scale of large scale, increasing the capacity to make even a small percentage of valve performance improvement can also get great benefits. Based on this, control valves for the process industry to do more, together with the advantages of rotary valve itself, which makes the valve than conventional rotary valve was more and more applications.

1 rotary valve characteristics Straight valve is usually divided into two major categories of programs and rotating. Linear actuator valve through a linear motion components such as the gate to allow or cut off the logistics. Programs are cut-off valve straight valve, gate valve, diaphragm valve and so on. Rotary valve through a rotating components to allow or cut off the logistics. Rotating parts can rotate 90 degrees of rotary valve called the 1 / 4 rotary valve. Sometimes 1 / 4 rotary valve can be extended to the classification of less than 270 degrees of rotation angle valve. By definition you can see, rotary valve is a rotating bezel by rotating parts such as valves rotate 90 degrees to change from the open spaces of the rotary valve to the off position. Rotary valves generally have the following characteristics.

(1) wide adjustable range Tuning range in the process industry is the most crucial, rotary valve adjustable range of approximately 150:1 (VALTEK the ball of the tuning range of 300:1 can be achieved, butterfly valves and cam deflection can be notes the range of 100:1). The corresponding adjustable range cut-off valve 30:1, that is 5 times the rotating valve can provide wide tuning range. For example, the maximum flow is 1000 l / min, cut-off valve can effectively reduce the flow to 30 L / min, while flow rotary valve can be adjusted to less than 10 liters / min, flow control valve on the key more accurate in the process in the better reproducibility, reduced process industries directly in the product.

Eccentric rotary valve two features to improve its tuning range, the first of its hole plate design, eccentric is an effective 1 / 4 of the park is a V-eccentric valve, while the traditional valve Park-shaped core is, when the eccentric rotary valve is off when it's smaller V-formation makes a very precise low flow control, large flows, it is almost the valve opens to almost the same diameter pipe. The second feature is the implementation of the machine stroke rotary valve actuators with a certain stroke and cylinder two kinds of membrane. 1 "cut-off valve of the trip is about 3 / 4" 7 / 8 "rotary valve travel more than two." Any Other Size of the valve. Trip input greater control at work the better side.

Higher than the control valve adjustable to provide the precision required by the ratio formula, regardless of the size of the flow path flows, the traditional linear or regulating valve is no longer adapt to the task, rotary valves can improve the device performance while reduce the control valve in the plant life cycle cost of running.

Wide range adjustable rotary valve allows the user to improve the standard of strict cut off, thereby enhancing the cost / benefit indicators. Metal seat with the village made of special materials to extend the service life of valves, improving the performance of the valve. Simple rotating structure designed to minimize the workload to maintain. Reduce the owner's production costs.

(2) close off

Straight trip out of the valve stem axis is the body, each cycle with a product designed for direct travel to avoid the leak is difficult, it would not want the product to the production process into the system, and can have a greater can not accept outside plant volatile leakage. Rotary valve rotary design problem does not exist in nature, because this valve with a low delay, high-thrust of the cylinder-type actuator, which provides executive body than other forms of higher stability more precisely, there are able to provide long-term close cut off the metal seat.

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