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07/19/2020
Refrigerant filling operation method of centrifugal chiller
The centrifugal chiller refrigeration compressor after completing the work procedure of filling the frozen lubricating oil, the next step should be the refrigerant filling operation, the method of operation is: (1) using copper pipes or PVC (polyvinyl chloride) pipes One end is connected with the filling valve at the lower part of the evaporator, and the other end is connected with the top joint of the refrigerant storage tank to ensure good sealing.
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08/25/2020
How to correctly take out ammonia refrigerant when repairing refrigeration parts
First, prepare all tools and emergency supplies before operation. Such as ammonia tanks or a certain number of ammonia bottles, scales, connecting pipes, fitter tools, gas masks, rubber gloves and first aid medicines.
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08/06/2020
How to distinguish the authenticity of the compressor of the antifreeze chiller
The familiar "pump" is a mechanical device that can increase potential energy. For example, a water pump mainly pumps water from a low position to a high position.
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07/27/2020
The working principle of screw unit and common failure analysis
1. Refrigeration cycle and pressure enthalpy diagram<br></br> The refrigeration cycle of a screw chiller can be represented by a pressure-enthalpy diagram. The main state points are shown in the diagram, which will be used in the following discussion.
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09/04/2020
10 reasons why the compressor industry should participate in foreign exhibitions
I heard that there are some foreign exhibitions in the air compressor industry? Does it make sense to run so far to participate?
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05/18/2022
PLC Analog Input
PLC analog inputs usually use voltage signals in the range of 20 volts and current signals in mA. Each PLC manufacturer has I / O modules to process these types of signals
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09/06/2020
How to distinguish whether air compressor oil has impurities
Everyone knows that screw air compressors have high requirements for oil. However, air compressors are easily mixed with others during use, which will not only affect the work of the air compressor, but also easily cause damage to the air compressor.
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06/21/2022
Transformers Selection and Buying Guide?
A transformer is a static piece of electrical equipment which transfers power from one voltage system to another by means of electromagnetic induction.
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03/03/2021
Voltage of servo motor: relationship between voltage and speed of servo motor
1)At high speed, the speed is proportional to the voltage 2) At low speed, the voltage is lower than the decrease of speed;
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09/06/2020
Application of Piston Rod Settlement Monitoring System in Reciprocating Compressor
1. Introduction A petrochemical plant imported a reciprocating compressor from abroad, the model is: B254-4118N3.3, 4 rows of symmetrical balanced type, the import and export parameters are: 135kPa (A)@14℃, 3.4MPa (A)@35℃, rotation speed: 425r/min, stroke: 240mm.