Compressors Valves
10 Minutes to Quickly Understand the 5 Key Valves of the Air Compressors
Aug
Air compressors have different valves, and each valve has a different function and purpose. If you have a thorough understanding of the design function and working principle of each valve, it will be better for the future inspection and maintenance of air compressors. Here Chengdu Pudding Mechatronic Co. CPMC provide the critical advice to help you understand the common faults and principles of the 5 key valves in air compressor system.
Because the valve has a certain service life, when the use time reaches the limit that the valve can withstand, it is inevitable that the valve will fail, so how should we avoid it?
The five major valve parts of the fuel injection air compressor are: Unloading valve, Min pressure valve, Oil stop valve, Check valve (One way valve) and Thermostatic valve. Let’s interpret each valve function and troubleshooting one by one.
A. Unloading valve function
When the gas consumption changes, the intake valve adjusts the opening degree of the valve body through the control system to match the gas consumption. It is a valve that controls the air compressor to produce and not produce gas.
Common corresponding faults:
1. The air compressor is not loaded. This fault control panel displays (no alarm; the operating state is loaded, the fuel injection pressure is very small or 0’; the machine head outlet temperature is less than 70C° to determine the machine
The group is not loaded. The problem lies in the unloading valve body, control circuit, loading and unloading solenoid valve and other parts, which need to be checked and eliminated one by one.
2. The air compressor is not unloaded. This fault control panel displays (no alarm; operating status’unloading; fuel injection pressure rise>4; head outlet temperature>80°C) to determine the machine
The group is not uninstalled. The problem lies in the unloading valve body, control circuit, loading and unloading solenoid valve, etc., which need to be checked and eliminated one by one.
B. Minimum pressure valve
Function:
1. The opening pressure of the minimum pressure valve is about 4 bar, to ensure that the pressure in the cylinder is not lower than this minimum pressure when the air is output, so as to avoid excessive air flow rate causing oil and gas separation.
The separation effect of the separator is reduced.
2. When the machine starts, a certain pressure is established in the oil cylinder to ensure the circulation of lubricating oil and provide the initial control pressure for the control loop.
3. It has the function of a one-way valve to prevent the compressed air of the pipe network from returning to the inside of the machine.
Common corresponding faults
1. The safety valve of the oil cylinder sprays air during operation. This failure is because the minimum pressure valve is not opened, which causes the pressure in the cylinder to be too high, and the safety valve is pressure-relief protection.
2. Motor overload protection occurs when the computer is running. This fault is that the minimum pressure valve is not opened, which causes the pressure in the cylinder to be too high, the main motor load increases, the current increases, and the thermal relay. The protector shuts down.
3. The air compressor failed to start. This failure is that the minimum pressure valve is not closed tightly, causing the compressed air of the pipe network to return, causing a certain pressure in the oil cylinder, causing the unit to fail to start.
verb: move. When the air compressor is started, when the control computer detects a certain pressure in the cylinder, the unit will not be able to start.
4. The oil pressure is too high when the air compressor is unloaded. This fault is that the minimum pressure valve is not closed tightly. When the unit is unloaded, the compressed air of the pipe network will flow back, which will increase the pressure in the cylinder and cause the oil pressure to rise.
High, the energy consumption of the unit increases.
C. Oil cut-off valve
Function:
After the air compressor is turned on, the oil cut-off valve is opened, and the lubricating oil that has passed through the oil filter is injected into the main engine. After the compressor is shut down, the oil cut-off valve is closed to cut off the oil supply.
Common corresponding faults:
1. The machine will jump to high temperature quickly after starting up. This fault is that the oil cut-off valve is not opened and the lubricating oil cannot be sprayed into the machine head. The oil cut-off valve needs to be checked and maintained.
2. High temperature alarm of air compressor. This fault is that the oil cut-off valve is not fully opened, and the amount of lubricating oil sprayed into the machine head is insufficient, and the oil cut-off valve needs to be cleaned and maintained.
3. When the machine stops suddenly, the lubricating oil will be sprayed back into the air filter. This fault is caused by the lagging or lax closing of the shutoff valve when the unit suddenly shuts down. The shutoff valve needs to be cleaned and maintained.
D. Check valve
Function:
The oil and gas mixture compressed by the main engine is unidirectionally delivered to the oil cylinder to prevent the oil and gas mixture in the cylinder from being sprayed back into the machine head when the machine fails suddenly, causing the rotor to reverse.
Common corresponding faults:
When the machine is stopped, the oil and gas mixture is sprayed back into the air filter. This fault is caused by the one-way valve stuck or damaged when the unit suddenly shuts down, and the one-way valve needs to be cleaned and maintained.
E. Temperature control valve
Function:
1. The temperature control valve core uses the principle of thermal expansion and contraction to adjust the oil passage formed between the valve body and the shell by extending and contracting, and controls the proportion of lubricating oil entering the oil cooler to ensure rotation. The sub-temperature is within the control range.
2. The temperature control valve is an original part that controls the outlet temperature of the machine head to be no less than 68. When the oil temperature is low, the temperature control valve is closed, and the lubricating oil is directly sprayed into the machine head to be quickly heated without passing through the cooler. The temperature at the outlet of the machine head can be increased rapidly to prevent the condensed water in the compressed air from being generated in the oil cylinder.
Note:
1. The opening temperature of the thermostatic valve is generally indicated on the valve core.
2. The maximum opening temperature of the thermostatic valve is the marked temperature + 15°C.
Learn more about Air Compressors Valves. Chengdu Air Compressor dealer keeps updating informative advice for buyer’s references. If you have further questions or requirements on spare parts, air compressors or woodworking tools, please feel free to contact with CPMC.
Dear, Good day
We kindly ask you to send us by email information about the price and
other conditions for the supply of the material described below:
Item Description
04 – UNTS
PNEUMATIC CYLINDER
APPLICATION AIR COMPRESSOR LT15 30
1503037780-J ATLAS COPCO
VERY IMPORTANT: (INFORM)
HS CODE, Delivery Time, Taxes.
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Send Certificates (if applicable)
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Thank you Dan for your comments and RFQ leaving on our website, our team will check and quote to you on Monday via email. If you need any other genuine parts for Atlas Copco, Epiroc drilling and mining equipment parts, Ingersoll Rand, CompAir, Gardner Denver, Doosan, Sullair, etc, feel free to contact with us.
Добрый день просим рассмотреть возможность поставки фильтров на компрессор ZH 7000-6-7(р/комплекты,фильтры, сепаратор, клапана)
Dear Sir or madam, thanks, please send us by email with the part numbers for ZH7000 Atlas Copco Air Compressors, we are looking forward to quoting you for your RFQs.
Добрый день, жду сообщений по поставке расходников
Thank you, please provide the part numbers, air compressor name plate by email to us: parts@aircompressorstrade.com.
Уважаемый Господин или Госпожа
Может ли ваша компания поставлять детали для центробежных воздушных компрессоров Ingersoll Rand? Для таких моделей, как Centac 400, C700E и т. д., а также запасных частей для безмасляных воздушных компрессоров Atlas Copco. Если да, то как быстро вы можете отправить нам продукцию и насколько надежна ваша продукция, если мы принимаем только оригинальные запасные части?
Dear Sir or madam, Thank you very much for leaving comment on our website. Our company offer MANY GENUINE ORIGINAL parts for all top brands of air compressors like Atlas Copco, Ingersoll Rand, CompAir, Doosan, Gardner Denver, and yes, we do serve centrifugal air compressors spare parts. You can compare our prices if based on 100% Genuine original parts. Thanks and hope we can communicate in email via English if possible. Kind regards, Team from CPMC, China.
I would like to request a Parts List Manual for Atlas Copco G55, We are planning to purchase PM parts for our compressor.
Your immediate response is highly appreciated.
Thanks!
Robert Arano
PDEC Co. (Purtlev Dynamics Engineering Company)
86 Hemedez Coumpound, Brgy. Sala Cabuyao Laguna Philippines
(049) 560 6264
Dear Robert, can you please send email to us with the compressor nameplate and so we can try to check the related user manual and see if we can get the part numbers for the PM parts. our email address: parts@aircompressorstrade.com (miss Wendy) or inquiry@aircompressorstrade.com (miss JoJo). Thank you for your inquiry and best regards, CPMC service team!
S No Description Part Number
1 Cooler Kit 3001531121
2 O-RING 0663210968
3 Seal Washer 0661100038
4 RING INTERNAL 1635051200
5 PROFILE, 1635051400
6 SEAL GASKET 1635051500
7 O RING 1623172600
8 COOLER AFTER 1635051900
9 CORE COOLER, AIR 1635051600
10 CORE COOLER, OIL 1635127300
11 O RING 0663210612
12 O RING 0663210968
Can someone please share prices and availibility.
Dear Kamran
Good morning and happy new Year 2025! We well received your message and our team will check and quote to you asap in this holiday period.
Kind regards
CPMC Team