DIFU Vane Pump PVD-SF-12C-10
Type: Vane Pump
Brand: DIFU
Type: Vane Pump
Brand: DIFU
Type: Vane Pump
Brand: DIFU
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07/12/2020
In the early years, many people felt that semi-hermetic screw compressors are expensive and have high technical threshold. Without semi-hermetic piston compressors, they are cheap and easy to use and maintain, so they are a bit daunted.
08/05/2020
As the evaporator commonly used in the refrigeration system, the air cooler directly affects the efficiency of the refrigeration system. As we all know, the air cooler will use different fin spacings according to the required ambient temperature.
06/20/2020
What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. Here are two formulas involved: ①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. ② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 2. Leakage During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. Why does the electric leakage cause the MCB to trip? There are two situations. ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. ②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. ②Measure whether the output current exceeds the standard. So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.
11/02/2023
Rotary screw air compressor (screw air compressor, screw type air compressor, rotary screw compressor), is a positive displacement air compressor
09/22/2020
An oilfield company’s compressor station ammonia compression refrigeration device mainly caused the reduction of natural gas processing capacity and increased power consumption; severe fouling would cause
05/21/2022
There are various of air cylinders and it is very important to choose the appropriate model. We provide you with the process of air cylinder selection as follow.
08/06/2020
In the era of modern technology development, the combination of cold storage design and automatic control is not too much. Now it is mainly concerned with the standardization of cold storage design.
09/05/2020
The test standards promulgated by the International Electrotechnical Commission IEC (hereinafter referred to as IEC) make it possible to evaluate the energy efficiency of motors.
11/17/2021
In modern city life, it's easy to see ice makers in restaurants, supermarkets, bars, cafes and other places, and there are car ice makers too.
08/20/2020
Part 1: Causes of condensation at the air outlet 1. Theoretical analysis of condensation: First of all, we must first understand the cause of condensation and why it occurs.