Low Pressure Screw Air Compressors Di

Why Choose Us

As a kind of main power widely used in various fields of industry, the air compressor is applied in textile, ceramics, machinery, manufacture, metallurgy, mining, food, electric, chemical and other industries. Jaguar air compressor is committed to providing energy-efficient, high-quality, outstanding-performance compressed air solutions for global customers. We specialize in producing Low Pressure Screw Compressor, High Flow Low Pressure Air Compressor, High Cfm Air Compressor, Screw Air Compressor for Textile Industry, Low Pressure Air Compressor for Textile, Large Discharge Screw Air Compressor, Low Pressure High Discharge Compressor, and other Low Pressure Screw Air Compressors.

Technology Based Factory

We have 140000m³ production base in Xiamen China, including 3 modern office building, 1 provincial technology centre, 1 national R&D experiment centre.

Professional Team

In presently, our company boasts a large team of 900+ employees, we have talent and expertise dedicated to delivering exceptional results.

Advanced Equipment

We have advanced equipment such as High Precision SBN Grinding Machine, Imported DMG MORI CNC Horizontal Machining Center, Imported German Zeiss CMM Measuring Center, Imported Italian Salvagnini Dynamic Laser Cutting Machine to produce and design our products.

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We have won CE certification, ASME certification, ISO 9001 quality management system, ISO 14001 environmental management system, ISO 45001 occupational health and safety management system and GB/T 29409 Intellectual Property Management Certification.

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What is Low Pressure Screw Air Compressors

Low Pressure Screw Compressor is a positive displacement machine that uses rotary motion. An opening valve sucks gas into the compressor chamber. Located in the chamber are the two screw rotors; when the machine is on, they will rotate at high speeds. As the impellers rotate, they trap and isolate air in the cavities between the rotors, thus moving the air down the chamber. If you want to know the specifications and prices of Low Pressure Screw Air Compressors, please contact us!

What are Advantages of Low Pressure Screw Compressor

Reducing Your Operational Costs
As energy costs are a compressor's biggest lifecycle cost, it's crucial that you consider the energy efficiency aspect of a compressed air installation when searching for your next compressed air investment. We are always looking for new ways to increase the energy savings of your production process, whether that means raising the industry standards for all low pressure screw compressors, optimizing our solutions to fit each process, or offering you additional ways to recover energy.

High Uptime
Low Pressure Screw Compressor can help you avoid unexpected downtime of your process. Reliability starts at the core of our units: with our components. The cooling jacket cools both bearings and the element housing to keep the element at the lowest possible temperature, which increases the lifetime of your components.

Avoid Unexpected Installation Costs
The whole is greater than the sum of its parts: by offering you a fully equipped unit that is ready for operation upon arrival, you not only avoid any unexpected installation costs, it also ensures that all components are aligned to work together and offer you the best performance. For instance, the water-cooled aftercooler which cools the process air is a necessary component as hot air can compromise the quality of your product.

Type of Low Pressure Screw Compressor

Dry Screw Compressors

Similar to the reciprocating compressor, the screw compressor is a positive displacement machine. The compression is repeated for each lobe of the rotors. Therefore a 4/6 profile with four lobes on the male rotor has four compression cycles during each rotation of the male rotor.

Wet/Oil-Flooded Screw Compressors

Oil-flooded screw compressors are similar to oil-free screws except that they inject oil, or rather, flood the process chamber with oil, which mixes with the process gas during the compression cycle.
Oil flooded screw compressors are available for capacities up to 28,000 m3/h and discharge pressure up to 100 barg. The injected lubricant can seal off the clearances between the rotors within the casing.

Common Low Pressure Screw Compressor Problems

01.Air Compressor Will not Start

You press the start button but nothing happens. Either an electrical problem, or the compressor has tripped on a safety device.
Check supply power. Check for errors on display. Check emergency stop is out. Check and reset the overload relay. If it's a new installation, check the phase sequence.

02.Compressor Shuts Down on High-Temperature

If your compressor trips on over temperature, it could be any of the following:
Ambient temperature too high or not enough ventilation.
Too low oil level
Wrong type of oil
Dirty oil cooler
Thermostatic valve not not working
Dirt / obstruction in oil lines

03.Compressor Runs but Will not Load

A screw compressor can run loaded ('pumping air') or unloaded ('idle'). The inlet/loading valve opens and closes according to air demand. The inlet valve is controlled by a solenoid valve that supplies control air to the inlet/loading valve.
Check electrical power to solenoid valve
Check solenoid valve coil and solenoid valve operation.
Check working of inlet/loading valve

04.Low Capacity / not Enough Pressure

First, check that there isn't a very high air demand, or air leak somewhere.
If the capacity of the air compressor is really too low, check the following:
Does the inlet valve fully open?
Check differential pressure over oil separator. Replace separator when necessary.
Check if inlet filter is clean
Check and replace compressed air filters (if installed).

05.Safety Valve Blows / too High Pressure

Compressor does not unload. Check if pressure switch is correctly set and working. Check inlet valve and loading solenoid for good operation.
If the safety valve is located before the oil separator, check differential pressure of oil separator.

06.Oil in compressed air

Oil in compressed air can have various causes:
Oil separator old / saturated
Scavenge line plugged
Too high running temperature
Too high oil level
Wrong type of oil used
Minimum pressure valve not working

07.Water in Compressed Air

Water is a natural by product of air compression. There will always be water in compressed air, unless we remove it.
Check the condensate trap for good operation. There should be water coming out every few minutes. If you open up the manual drain, there should only a little water be coming out.
If you have a compressed air dryer, check the dew point.
Compressor overload relay trips
Check the current draw with a current clamp meter.
If the motor draws excessive current:
Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any 'hiccups' (be sure to completely shut down the air compressor!).
Check the isolation of the motor winding. Should be in the mega-ohms (you need an isolation tester / high voltage ohm meter for this).
Check the voltage when the compressor is running. If the voltage drop significantly when the compressor starts/runs, you have a bad connection somewhere. Check all relays, fuses and electrical connections.
Check if all phases are present

Accessories for Low Pressure Screw Compressor function

Air Filter: The air filter is a pleated paper filter designed to primarily filter dust particles from the air.
Intake Valve: The loading, unloading, and pressure adjustments in the low-pressure screw air compressor are facilitated by the opening and closing of the intake valve.
Pressure Switch: The pressure changes in the low-pressure screw air compressor control the intake valve electromagnetic valve, regulating the opening and closing of the intake valve, consequently controlling the motor. The pressure switch can be configured to a maximum pressure value; when this pressure is reached, the intake valve closes, sending a stop delay signal to the motor. Simultaneously, a minimum pressure value can be set, prompting the intake valve to open or the motor to restart when the pressure drops to this value.
Outlet Check Valve: After the compressed air enters the air tank from the compressor, the outlet check valve prevents the compressed air from flowing back into the low-pressure screw air compressor when it stops.
Safety Valve Function: The safety valve comes into play if the pressure switch is improperly adjusted or fails, resulting in the pressure in the oil and gas barrel exceeding the rated pressure by 0.1MPa. It opens to safeguard the low-pressure screw air compressor unit.
Pressure Maintenance Valve: Positioned at the outlet of the oil-fine separator above the oil-gas barrel, this valve's opening pressure is set to approximately 0.45MPa.

Safety Precautions

Before you start using an air compressor, it's essential to take certain safety precautions to ensure a safe working environment. By following these steps, you can minimize the risk of accidents and ensure the longevity of your equipment. Learn how to use an air compressor safely by conducting a pre-operation inspection.

Conducting a Pre-operation Inspection of The Compresso

Before operating the air compressor, conduct a thorough inspection to ensure everything is in proper working condition. Check for any signs of damage, leaks, or loose connections. Inspect the air filters and clean or replace them if necessary. Verify that the pressure relief valve is functioning correctly. By performing this inspection, you can identify any potential issues and address them before starting the compressor.

Ensuring Proper Installation and Grounding of The Equipment

Proper installation and grounding are crucial for the safe operation of an air compressor. Follow the manufacturer's guidelines for installation, including proper ventilation and clearances. Ensure that the compressor is securely mounted on a stable surface. Additionally, make sure the compressor is properly grounded to prevent electrical hazards.

Checking The Condition and Integrity of Hoses, Fittings, and Other Accessories

Inspect all hoses, fittings, and other accessories for any signs of wear, damage, or leaks. Replace any damaged components immediately. Ensure that all connections are tight and secure. It's also important to use the correct type and size of hoses and fittings for your specific application.

Verifying That The Compressor Is Properly Sized for The Intended Applications

Using an air compressor that is properly sized for your intended applications is crucial for safe and efficient operation. Check the compressor's specifications and ensure it can handle the required air pressure and volume. Using an undersized compressor can lead to overheating and premature wear, while an oversized compressor may result in inefficient operation and unnecessary energy consumption.

Certifications

101

productcate-1653-2336

Frequently Asked Questions

Q: What is the pressure limit on a screw compressor?

A: Rotary-screw compressors are commonly available in the 5 through 500 HP range and can produce air flows in excess of 2500 SCFM. While the pressure produced by a single-stage screw compressor is limited to 250 PSIG, a two-stage screw compressor can deliver pressures of up to 600 PSIG.

Q: What is the minimum pressure for a compressor?

A: Air tools made for general use with portable air compressors typically require 0 to 5 cubic feet per minute (cfm) at 70 to 90 pounds per square inch (psi), whereas with larger tools connected to stationary systems, the requirements usually exceed 10 cfm at 100 to 120 psi.

Q: What is high pressure and low pressure in compressor?

A: Compressed breathing air systems are typically either low pressure or high pressure systems based on operating pressure of the compressor system. The technical description in CSA Z180. 1 defines it as: Low Pressure is 15 psi to 2216psi (manufacture's rating), and High Pressure is 2216psi and above.

Q: What is a good compressor pressure?

A: Most compressed air equipment is designed to operate at around 90 – 100 psi (6 – 7 bar). For this reason, most people only need a compressor with a maximum pressure of 7 bar. For some applications, an higher pressure is needed, like 15 or 30 bar.

Q: How do you control the pressure of a screw compressor?

A: The main methods of screw compressor capacity control are shaft speed variation, suction throttling and variation of the suction volume. These have been analysed and are compared by the use of a standard mathematical model which has been adapted for this purpose.

Q: How do you size a screw compressor?

A: First get the manufacturer recommended cfm for all the tools that are used on a daily basis in the shop. Second take their total cfm's together and multiply that number by 1.3 to get the total cfm needed for the shop.

Q: How does a low pressure compressor work?

A: A low-pressure natural gas compressor reduces the space between gas molecules, effectively "squeezing" the gas. This squeezing—called compression—increases the pressure so the gas can be used to aid in gas lift (upstream) or transported down a pipeline (midstream).

Q: What causes low pressure in a compressor?

A: Another reason which causes pressure drop is the air quality within an air compressor system. Contaminants such as water vapor, oil and other fumes affect the air quality and create resistance to airflow, resulting in pressure drop.

Q: What is main difference between low pressure and high pressure?

A: Those that have less pressure are called low-pressure systems. Low-pressure systems "suck" air into them because nature wants everything to have equal pressure. By doing this, they generally create winds and undesirable weather. High-pressure systems, on the other hand, have more air pressure than their surroundings.

Q: What is CFM in compressor?

A: CFM measures the volume of air, in cubic feet, for each minute it moves. In the case of an air compressor, CFM indicates how much air can move per minute. For example, an air compressor's output rated for 30 CFM means 30 cubic feet of air flows per minute.

Q: How do you calculate compressor pressure?

A: Compression Ratio Formula: Compression ratio is the ratio of the inlet pressure to the outlet pressure of a compressor. Compression Ratio = P1/P2. Where P1 is the inlet pressure and P2 is the outlet pressure.

Q: What is a screw compressor used for?

A: A rotary screw air compressor is a type of air compressor which uses a rotary-type positive mechanism. Screw compressors can commonly be found where large volumes of high-pressure air are in need. When your application requires continuous air demand, a screw compressor is the way to go.

Q: How pressure is increased in compressor?

A: As gas passes through the compressor, its velocity is alternately increased and decreased. During each increase in velocity the kinetic energy of the gas is increased, and during each decrease in velocity this kinetic energy is converted into an increase in pressure.

Q: Which is better piston and screw compressor?

A: Because piston compressors are limited in their duty cycles, they're ideal for applications with low duty cycle requirements and low daily running hours. Screw compressors, however, have long duty cycles. In fact, screws are engineered to run 100%, all day, every day!

Q: Which bearing is used in screw compressor?

A: The most commonly used bearing types are the single row angular con- tact ball bearing and the cylindrical roller bearing, however, deep groove ball bearings, four-point contact ball bearings, needle roller bearings, and taper roller bearings are also used.

Q: What is minimum pressure valve?

A: Minimum pressure check valves are spring loaded pressure control valves with an inbuilt check (non-return) valve. They are usually fitted to the AIR/OIL separator tank. The valve opens when the increasing inlet pressure exceeds the adjusted opening pressure.

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