The pp filter element
manufacturer must not leak air or water, otherwise it will destroy the vacuum at the water inlet of the pump, reduce the water output of the pump, and even fail to pump water in severe cases. The suction pipeline requires strict tightness, from the technical point of the pipeline installation. Therefore, it is necessary to do a good job in the interface of the pipeline to ensure the construction quality of the pipeline connection. When the elevation and water temperature of the pump installation site are different from the test conditions, it should be pointed out. For example, if the local altitude is more than 300 meters or the temperature of the pumped water exceeds 20 degrees Celsius, the calculated value needs to be corrected. That is, the atmospheric pressure at different altitudes and the saturated vapor pressure at a water temperature above 20 degrees Celsius. However, when the water temperature is below 20 degrees Celsius, the saturated steam pressure is negligible. The key to the technology of pp filter element device is to determine the height of the water pump device. This height refers to the vertical distance from the water surface of the water source to the centerline of the pump impeller. The allowable suction vacuum height indicated on the pump nameplate or product manual refers to the vacuum value on the section of the water inlet of the pump, and it is under the standard atmospheric pressure; when the water temperature is 20 degrees Celsius, the test is carried out and it is measured without considering the matching of the suction pipe. water flow conditions. The height of the water pump device should be allowed to absorb the vacuum height after deducting the loss of the suction pipe, and the remaining part of the value must overcome the actual terrain water absorption height. The height of the pump installation cannot exceed the calculated value, otherwise, the pump will not be able to pump water. In addition, the size that affects the calculated value is the resistance loss head of the suction pipe. Therefore, it is advisable to use a shorter pipeline arrangement and install as few fittings as elbows as much as possible. It is also possible to appropriately install a larger diameter water pipe to reduce the flow rate in the pipe. The pp cotton filter element can be controlled within tens of milliseconds even if it is a pilot type. Due to the self-contained loop, the response time can be as short as a few milliseconds. The filter element is more responsive than other automatic control valves. A properly designed coil has low power consumption and is an energy-saving product; it can also be achieved only by triggering the action to automatically maintain the valve position without power consumption at all. The pp filter element has a small size, which not only saves space, but also is lightweight and beautiful. The rotation or movement of the valve core is controlled by electric, pneumatic and hydraulic actuators. This is to solve the problem of external leakage caused by the sealing of the valve stem; only the pp filter element is completed by electromagnetic force acting on the iron core sealed in the magnetic isolation sleeve, and internal and external leakage is a factor that endangers safety. Other self-control valves usually have the stem extended. There is no dynamic seal, so external leakage is easy to block. The torque control of the electric valve is not easy, and it is prone to internal leakage, and even the head of the valve stem is broken; the structure type is easy to control the internal leakage until it drops to zero. Therefore, the pp filter element is particularly safe to use, especially for corrosive, toxic or high and low temperature media. The price is also low and its structure is simple. Compared with other types of actuators such as control valves, it is easier to install and maintain. The more significant self-control system is much simpler and the price is much lower. Because the pp filter element is controlled by the switch signal, it is very convenient to connect with the industrial computer.
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