Five-layer seal_rotary valve_rotary valve manufacturer
The impeller of the rotary valve is its accessory. The axis of the linear valve is the process of the valve stem entering and leaving the valve body, and each cycle will bring out the product. Linear design is difficult to avoid leakage. It brings unwanted products into the production process system and may produce a large number of unacceptable factory volatile external leaks. The rotating design of the rotary valve basically does not have this problem, because the valve uses a low hysteresis, high thrust cylindrical actuator. Compared with other types of actuators, it can provide more accuracy, higher stability, and can provide Long-term tightness.
The flow rate of a straight-stroke valve is part of the flow rate of the pipe where the valve is installed. The way to improve the flow is to increase the size of the straight-stroke valve. The size of the straight-stroke valve may usually be larger than the pipe size. The capacity of the rotary valve is approximately 2 to 3 times that of the straight-stroke valve of the same size. The rotary valve can be used to increase the mixing volume without changing the size of the feed line, which can greatly reduce the cost. Therefore, some rotary valves have been designed to replace the flange-to-flange connection of the shut-off valve, and are equipped with connecting bolts, which are cheaper than the shut-off valve they replace.
In the processing industry, throttling can cause a lot of cavitation. Cavitation can damage the pipeline and generate unacceptable noise levels. It can also interfere with the metering system and cause unclear or unreliable readings. The rotary valve has a sturdy design. The valve action failure caused by the water hammer phenomenon is greatly reduced, and the valve core can absorb part of the excess energy, thereby greatly reducing the cavitation phenomenon and related problems.
The external leakage of the standard rotary valve is 100 times that of the standard shut-off valve. The movement of the valve stem of the shut-off valve will take away dust and bring sand into the valve, which will damage the graphite packing. In the rotary valve, the valve stem does not make any movement in and out, but rotates, so as not to damage the packing and avoid external leakage.
The rotary valve has compact structure, stable operation, low noise, and can convey materials evenly and continuously. And since the distance between the bearing and the gearbox and the housing is constant, the high temperature resistance and lubricity are improved.