Dragon Boat Festival holiday notice
Please note that during the Dragon Boat Festival, our office willbeclosed from June 22 to June 25, 2023 and resume normaloperations on June 26, 2023.ln order to provide our best services for you, please kindly help prearrange your orders in advance. lf you have any emergencies duringthe holidays, please feel free to contact us. We will do our best toget back to you at our convenience.
SHENZHEN ANGES MACHINERY CO,LTD
Chinese Mid Autumn Festival and National Day
Please note that during the Mid-Autumn Festival and National Dayour office will be closed from September 29 to October 6, 2023 andwill resume normal operation on October 7, 2023. If you have anyemergency situations during our vacation, please feel free to contactus at any time. We will do our best to reply to you at a convenienttime.
SHENZHEN ANGES MACHINERY CO.LTD
PLAST IMAGEN MEXICO 2023
Plast Imagen Mexico 2023 brings together representatives from the following industries: food processing, packaging, chemicals and plastics, household articles, cosmetics, automotive, recycling, pharmaceuticals, electronics / electrical, tubes and pipes for construction, toys, agriculture, furnitur and medical equipment.Plast Imagen Mexico 2023 will be held in Mexico City on 07-10 Nov 2023.
Water-cooled chiller high pressure alarm
When there is a high pressure alarm in the water-cooled chiller, it is mainly related to the cooling water system:
1. Cooling water valve is not opened
The water cooling unit is provided with circulating cooling water by the cooling tower. If you forget to open the cooling water valve during use, the cooling water will not be circulated to the chiller.
Solution: Open the cooling water valve.
2, cooling water flow is too small or cooling water temperature is too high
These two conditions will lead to poor heat dissipation, the refrigerant temperature can not be cooled, there will be high pressure alarm.
Solution: Check whether the installed pipe size matches the size of the chiller, whether the pump works normally, and whether the water valve is opened to the maximum position.
3, cooling water tower failure
When the cooling tower fails and the cooling water cannot be circulated to the chiller, a high pressure alarm will occur.
Solution: Check whether the cooling tower is faulty.
If the water-cooled chiller is used for a long time without maintenance, it is easy to lead to the accumulation of debris such as scale on the pipe wall, which is bound to affect the efficiency of the condenser.
Solution: Clean up the scale.
Why air-cooled chiller has high pressure alarm?
In hot summer, many air-cooled chillers have high pressure alarm,especially in areas with relatively high temperatures which can be above 45℃, such as Saudi Arabia, the United Arab Emirates, Iraq and so on.
General air-cooled chiller is equipped with a full set of protection devices, when the chiller appears high pressure alarm, it will automatically start the protection device, and the corresponding fault indicator light will be lit.
The high pressure alarm of the air-cooled chiller is triggered by the poor cooling effect of the condenser.If this problem is not fixed and keep running the chiller at high pressure for a long time, it will cause the current to be too large and burn the compressor.
The reasons for the chiller high pressure alarm are as follows:
1. Air-cooled chiller’s condenser rely on fans to dissipate heat.When the ambient temperature is above 42 degrees, the heat dissipation of the condenser is poor, that is, the heat generated by the refrigerant circulation cannot be taken away by the fan.
2. The condenser is dirty and blocked, which will also cause poor heat dissipation and lead to high pressure alarm.
1. Check whether the fan works properly.
2. Make sure there’s good ventilation to exhaust hot air smoothly.
3. If the ambient temperature is higher than 42 degrees, use a fan or cooler to cool down the temperature around.
4. Periodically remove the air filter to clean the fins or clean the fins with high-pressure air.
5. If the ambient temperature is around 42 ℃, need to increase the condenser size to improve heat dissipation efficiency.Normally, we will increase size to 25% for chiller using refrigerant R22, R407c, R410a.
If ambient temperature higher than 45 ℃, we suggest to design the chiller with R134a which can be used at ambient temperature of 50 ℃.The disadvantage is that the cost is relatively high, because its refrigeration efficiency is only 65% compare with other refrigerants, in order to achieve the same cooling capacity, you must use a larger compressor.
P.S. The installation of air-cooled chiller should choose the right location to ensure that the installation environment is well ventilated.
How to Maintain Chiller in Winter
In the summer, many factories need to run the chiller for24 hours everyday, which is very high efficiency.But in winter,many factories insome areasdon’t need chillers to cool. When shuts down the chiller, we must do a good job in the maintenance of chiller, so how to maintain chiller in winter?
1. Shut off the water source of the chiller, and clean the water inside the unit components and pipes to avoid water corrosion of the unit components after the shutdown or frost-swell copper pipe with too low temperature.
At the same time, the drain nut under the water pump should be unscrewed to drain out the remaining water in the water pump, so as to prevent the water system from freezing due to the low ambient temperature,and lead tothe evaporator bursting and cracking which may cause the refrigerant leakage or damage of the pump impeller and other faults.
2.Clean the fans of the air-cooled chiller and keep it in a clean.
3.Whether tank of evaporator is anyimpurity, and remove it.
4.Check the using of lubricating oil through data records, and replacing the lubricating oil regularly according to the standards to maintain a good lubrication.
5.Cooling water pipes of the chiller must be insulated which not only prevent the serious loss of cooling capacity, but also prevent the dew formed on the outer of the pipes.
1.Keep refrigerant and oil in clean and moisture-free to avoid moisture pollution.Need vacuum to remove moisture after maintenance on any part of the cooling system and before restarting work.
2.Keepclean for the in letfilter of the chiller. Regular inspections are required, especially forthe suction passage of compressor there may be welding slag and pipesrust.There are too much dirt on the suction filter, which will cause to fracture filter, and particles leak into compressor.
3.Keep clean forthe oil filter. If there is an increase in pressure-drop , it indicates that there is dirt, and it is necessary to shut down thechiller to clean or replace theoilfilter.Compressor runs under high pressure-drop for a long-term, which will cause to run out ofcompressor oilanddamage bearings early.
4.Avoid the chiller compressor from being blocked by liquid refrigerant. Make sure that there is overheating enough and the suitable suction accumulator to avoidcharge liquid refrigerant into the compressor. Liquid refrigerant will cause tocut the lifespan of the compressor, and complete damage to the compressor under extreme conditions.
5.Protect the compressor during shutdown forlong-term.If non-operational shutdown for a long term,and then the compressor should be vacuumed to low pressure and then filled with nitrogen or oil.
6.As long as the compressor shows obvious change in vibration level, noise, or performance in any time, it should be taking preventive maintenance inspections.
About Chiller Low Pressure Alarm
1.Cooling system leak
There are leaks in the connecting pipes of the cooling system,such as welding point leakage, corrosion leakage, fracture caused by mechanical vibration,and human factors, etc. These will leads to malfunction of low pressure.
First of all, use leakage detection liquid (soap water, or detergent mixed with water) or halogen leak detector to find the leakage point. After the leakage point is found, repair it with welding equipment,then pressure holding to test leak and vacuum pumping before charging refrigerant according to the manufacturer's specifications, the chiller can resume normal operation.
2.Cooling system blockage
A. Blockage By impurities
If the filter is blocked due to dirt, it will only cause the cooling capacity drop slightly, and you may not even feel any affected.When the filter is slightly clogged, there will be a temperature difference of the inlet and outlet of the filter, which can be felt by holding the inlet and outlet with your hand.When it is block seriously, the filter will dew or frost. If there is dew or frost (except the dew after the chiller stop running under normal operation), it can be judged that the filter is block.
Replace the filter of same model
The water in the system runs with the refrigerant to the throttle valve (expansion valve). After throttling expansion, freeze at throttle outlet, thus blocking the throttle valve (expansion valve) and lead to a low-pressure fault.
Change the filter with same model.
C.Expansion Valve Damaged
Expansion valve is affected by environment in the process of using. There is corrosive gases that will corrode the liquid in some environments,which will corrode the expansion valve.
Replace new expansion valve of same model
3. Heating exchange of evaporator is seriously in sufficient.
A.Insufficient water flow in the evaporator
The water pump is broken or something bad enter in to the pump impellers,appear leakage in the water inlet pipes of water pump,(It is difficult to check, needs careful analysis),which are resulting in insufficient water flow.
Replace water pump. Or disassemble the water pump to clear the bad something in the impellers.
B.Evaporator is blocked by bad something
Firstly, you must eliminate the problem of the water pump. When the equipment is normal, there will not be a lot of condensed water,frostorice on the surface of the compressor. When you see a lot of condensed water,frostorice on the surface of the compressor, it can basically be judged that the evaporator is blocked.
If the evaporator is blocked or the evaporator tubesarescaled,please disassemble the evaporator,and remove the evaporator tubes, then rinse with a high-pressure water gun or soake and wash with a special chemical liquid.
Notice of Chinaplas 2020
Due to COVID-19, the 34th Chinaplas,which had been postponed to August 2020 in Shanghai, will not be held as scheduled and will be postponed to 13 to 16 April 2021, with the venue changed to shenzhen international convention and exhibition center.
To defeat the epidemic requires the confidence and joint efforts of all of us.
We will stay true to our original intention and make every effort to prepare for the event in April 2021.And looking forward to meeting you in Shenzhen, a vigorous and innovative city, to explore a new journey together!
SHENZHEN ANGES MACHINERY CO.,LTD. Chinese New Year Holidays Notice
Please note that our company will be closed forthe Chinese New Year celebration from Jan.132023(Fri.) until Jan,31,2023(Tues.). Normalbusiness will resume on Feb.1,2023(Wed.).In order to provide our best services for you,please kindly help pre-arrange your orders inadvance. lf you have any emergencies during theholidays, please feel free to contact us.We will doour best to get back to you at our convenienceAt the early of the year 2023, we would like toexpress our best wishes and thankfulness foryour great support in the past year.
SHENZHEN ANGES MACHINERY CO.,LTD
The 15th Bangladesh International Plastics, Packaging and Printing Industrial Fair
To our Valued customers,We hereby sincerely invite you to visit our booth at TheIPF Bangladesh from Feburary 22th to 25th, 2023.
We're specialized in the production of industrial processwater chiller since 2004, Air-cooled and Water-cooed typechillers, small capacity scroll chillers, large capacity screwchillers and integrated central water chillers, which arewidely used in rubber and plastic industry, beverage fillingand food processing, printing, laser cutting and so on.It would be a great pleasure to meet you at the exhibition.
The 35th International Exhibition on Plastics and Rubber Industries
Date: April 17th-20rd, 2023
Shenzhen World Exhibition & Convention Center
Booth: Hall 2, G21
No.1 Zhancheng Road, Fuhai Street, Bao’an District, Shenzhen, Guangdong, PR China
CHINAPLAS is the Asia’s No.1 & world’s No.2 plastic and rubber trade fair, it attracts thousands of exhibits and visitors from both domestic and international. It has a long history since the opening year 1983 and till now. It holds every one year to provide opportunities of information exchanging for all plastic relevant fields globally, and supply a bright platform for enterprises and corporations which strive to expand or consolidate China and world markets.
During CHINAPLAS 2023, ANGES Group focus on process cooling chiller since 2004 and will show 4 units water chiller which are warmly welcomed by customers for the concepts of professional, energy-saving and efficiency. We provide all kinds of industrial chillers, Air cooled chiller and Water cooed chiller chiller, scroll chiller and screw chiller, central water chillers and so on.
We warmly invite you to visit us in Hall 2, No.G21.Looking forward to our first meeting in three years!