1. UE pressure switch dead zone (return difference) on the process selection The dead zone refers to the difference between the pressure switch action value and the recovery value, the foreign call is dead zone, the domestic we refer to the poor switch, and some people call Hysteresis, for example, need to set the under-reporting 11MPa, if the dead zone of this switch is 1MPa, then the pressure will be reset when the 12MPA switch is pressed, but if the pressure in the design is less than 12MPA, then the pressure switch is always in the alarm state. Can't regain the position. Therefore, when choosing a mechanical pressure switch, you must consider the dead zone, especially in the case of double-point selection. The maximum and minimum values ​​of the typical dead zone marked are based on the setting of the first line. If it is set at the lower end of its adjustable range, the dead zone is also close to the minimum value. On the contrary, the dead zone will be Close to the maximum value in the label. In addition, some models have fixed dead zones, and some models have adjustable dead zones. Electronic pressure switches are fully adjustable, so there is no need to consider dead zones. The high-current slip ring is specially developed for high-power equipment. It can choose 50A, 100A, 250A, 500A, 1500A, 3000A and other specifications. It can also combine current and signal, which is easy to install, light weight and large current load. It is very suitable for welding, electroplating and other industries. High Current Slip Ring,Encoder Servo Motor,Connector Electrical,Rotating Electrical Connectors Dongguan Oubaibo Technology Co., Ltd. , https://www.sliproub.com
2. Maximum pressure, the effect of withstand voltage on the switch The maximum pressure is the pressure that the switch can continuously withstand without causing drift of the set point or damage to the sensing element. Withstand voltage: The maximum pressure that the sensing element can withstand occasionally, the switch will not be damaged but the set value needs to be recalibrated.
3. Diaphragm selection
The UE sensing pressure element is divided into three types: diaphragm, bellows and piston. The characteristics of the diaphragm switch are good versatility, selectivity and comprehensive performance. The advantage of welding stainless steel is zero leakage; the bellows is characterized by death. The area is small with high precision; the piston is characterized by high pressure resistance; a variety of pressure sensitive components make the UE pressure switch the most suitable for any field.
4. The influence of temperature on the selection of pressure switch. When selecting the type, some conditions such as furnace temperature is 1000 °C, but no pressure switch can withstand 1000 °C. When installing in the field, consider adding accessories. Siphon (filled), to achieve the purpose of cooling. Therefore, the temperature is not considered in general selection.
5. Debugging mode Pressure switch is generally divided into internal adjustable and external adjustable. Internal adjustable can reduce the risk of misoperation, but it is inconvenient to operate. The explosion-proof area cannot be debugged on site. The external adjustable operation is convenient and the explosion-proof area It can be debugged on site, but the general selection space is small, the common models are not optional, and the price is expensive.