Pressure switch precautions
Pressure switches are widely used in household, commercial, automotive refrigeration systems for high and low pressure protection control, steam conditions and power stations; accumulators, receivers, flash tanks, separators, scrubbers, oil refineries. It is also suitable for high and low pressure protection control of various equipment tools. But in the choice of pressure switch, we should note the following:
1. The need for explosion-proof: explosion-proof form is divided into flameproof and intrinsically safe, Nagano products for the majority of flameproof.
2. Need to indicate: according to customer instructions.
3. Number of contacts: one contact (one output) or two contacts (two outputs).
4. Determination of the set value and pressure range: The recommended setting range is between 30% and 65% of the pressure range, which can be set between 15% and 90% of the pressure range.
5. The form of splicing: adjustable or fixed.
6. Whether there is pulsation: If the pressure is pulsating or vibration, need to bring the throttle to suppress the pulse pressure on the instrument damage.
7. With the diaphragm of the occasion: the determination of corrosive, high viscosity or temperature is too high, the need to use with a diaphragm.
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Installation Note: Has the UE pressure switch H100 as an example to install the components in the vibration, the temperature changes the smallest place. The proper mounting position is effective in preventing moisture from entering the housing. If the components are to be installed in harsh conditions, they must be installed in a vertical (pressure connector down). Never install it in an environment that exceeds the specified temperature range. The control system components can be installed in any location. Can be mounted on the surface of the housing by means of a mounting strip on the edge of the housing or directly on a rigid pipe through a pressure connector. The surface mount bracket is provided with a low pressure member and differential pressure members 520-535, 540-543, 544-548. The control system components must be installed in the place where condensation is recommended and installed in a vertical manner to prevent water from entering the wiring terminal of the switch. Do not try to tighten the pressure connection with the shell. Use a wrench to tighten the pressure connector to the catheter. In order to prevent damage to the pressure sensor during surface mounting, use a rear wrench to stabilize the position of the nut. Pressure switch application environment: In order to avoid damage to the device, the maximum temperature can not exceed the scope of the specification, even in the short process. Operation can be allowed to start and test to achieve the maximum temperature, but in continuous operation, must be strictly installed range of data to operate. Longer work at the highest temperature will reduce the life of the sensor. Basically this is the bar, there are to ask me in Beijing Kang Sen Sen
