UE压力开关H100-218（US UE pressure switch H100-218 ）

American UE pressure switch H100-218    overview 100 series pressure and temperature switches are a series of switches with very good performance and price ratio. They are widely used in industrial processes and OEM users. The integrated design and the shape and structure of the shell make them stronger and more convenient for wiring. . All-weather series switches have a variety of micro switches and a variety of process interface options to meet various needs. With its own characteristics, the 100 series is widely used in heat tracing, antifreeze protection, process equipment (pumps, compressors), alarm panel input and flame arresting system. working principle The working principle of the pressure switch: When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously, and the switch joint is connected or disconnected by connecting the guide rod. When the pressure drops or rises When the rated recovery value is reached, the disc resets instantaneously and the switch automatically resets, or in simple terms, when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, and the switch element is pushed directly or after comparison to change the switch element. On-off state to achieve the purpose of controlling the measured pressure. The elastic components used in the pressure switch include single coil spring tube, diaphragm, bellows and so on.Features ● Meet UL list and cUL certification and CE standards● Single point output (SPDT or DPDT)● Welded stainless steel diaphragm● Water column level low pressure and differential pressure switch● A variety of optional sensing materials can meet various corrosivenessMedium requirements● Clean stainless steel sanitary interface● Very wide adjustable dead zone to meet the needs of pumps   Precautions Pressure switches are widely used in high and low pressure protection and control of household, commercial and automotive refrigeration systems, steam working conditions and power stations; accumulators, receivers, flash tanks, separators, scrubbers, refinery units. It is also applicable to the high and low pressure protection control of various equipment tools. However, in the selection of the pressure switch, the following points must be paid attention to: 1. The necessity of explosion-proof: explosion-proof forms are divided into flameproof type and intrinsically safe type. 2. Do you need to bring instructions: according to customer instructions. 3. Number of contacts: one contact (one output) or two contacts (two outputs). 4. Determination of setting value and pressure range: the recommended setting range is between 30% and 65% of the pressure range, and the settable range is between 15% and 90% of the pressure range. 5. The form of connection difference: adjustable or fixed. 6. Whether there is pulsation: If the pressure pulsates or vibrates, a throttle valve is required to suppress the damage to the instrument caused by the pulsating pressure. 7. Occasions with a diaphragm: When measuring corrosiveness, high viscosity or high temperature, it is necessary to use a diaphragm. 

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