China Hot selling China Lubricated CHINAMFG 3330X1750X1640mm Rotary Screw Air Compressors Diesel Compressor with High Quality air compressor oil

Product Description

Model  MDS185-FF
Compressor Air
delivery
m3/min

5.18

cu.ft/min   185
Discharge pressure bar 7
psig 101.5

Lubricating Oil Capacity

L 23
Diesel
Engine
Manufacture&Model

Foxair-4571DF-005

Cylinder Number 4
Rotation speed(Rmp) Operating 2650
Idle speed(r/min) 2200
Rated power(KW)

42

Lubricating Oil capacity(L) 300

Displacement (L)

2.7

Lubricating Oil Capacity (L)

7

Coolant Capacity (L)

9

Battery

6-QW-70

Standard Configuration

Suction valve                                    Lubricating oil filter                           Oil thermostatic valve                                             50°C radiator
 Solenoid valve                                Vertical air/oil tank                                Pressure regular valve                              Air/oil separator                     

  Lubricating oil radiator       Safety valve                                                   Emergency stop button                                 Air filter of engine
 Minimum pressure valve       Lockable battery isolator switch                                                                                                                                                                 
 Air filter of compressor        Vent valve                                                       Powder coated canopy                                           Shuttle valve    
 24V sealed for life maintenance free battery                                Fuel tank for 8 hours running

General Features

Structure diagram

1. Lifting bail   2.Exhaust outlet   3.Door    4. Handle   5.Service valve    6. Instrument panel

 

Feature&Benefit
Feature   Benefit
Pressure selection and control Easy pressure setting
Flow selection and control The working pressure and airflow rate can be adjusted according to the size of air consumption without wasting any diesel
The twin-screw rotor is directly connected with the diesel engine by a highly flexible coupling Outputting more air with less energy consumption, featuring high reliability, longer service life, and low maintenance cost.
The two-stage air filtration system The total efficiency of air filtration reaches 99.8% ensuring the compressor to not be infringed by dust and dirt particles and longer service life of the engine
High-temperature resistance design Able to run for a long time under extreme cold or hot temperature from -20ºC to 50ºC
One-button start, clear operational parameters Operators don’t have to go through long-term professional training, and unattended operations can be achieved.

 

Application areas

Field Application Nominal Working Pressure(bar) Free Air Delivery Range(m3/min)
General Construction
(building sites, road maintenance, bridges, tunnels, concrete pumping and shotcreting)
Hand-held pneumatic breakers 7~14 5~13
Jack hammers
Air guns
Shotcrete equipment
Pneumatic wrenches
Nut runners
Ground Engineering Drilling 
(basement and foundation excavation for apartment blocks and other buildings)
Pneumatic rock drills 7~17 12~28
Block cutters
Dewatering pumps.
Hand-held pneumatic breakers
Utility, CHINAMFG Blasting
(shipyards, steel construction and large renovation jobs)
Sandblasting
(remove rust, scale, paint)
7~10 10~22
Blast Hole Drilling
(aggregate production for construction stabilization, cement production in limestone quarries and open pit mining)
Rock drills 14~21 12~29
Dewatering pumps
Hand-held breakers
High Pressure Drilling
(drilling for water wells and foundations for high-rise buildings, along with geotechnical/geothermal applications)
Water well drilling 20~35 18~40
 DTH drilling
Rotary drilling

 

Selection table

Small Series
Small Series FAD Pressure Engine model Dimensional Date(mm)
m3/min cfm Bar psig length width height weight(kg)
model with tow bar without tow bar
MDS55S-7 1,55 55  7 101,5  D902 2925 1650 1200 1200 600
MDS80S-7 2,24 80  7 101,5 D1005 2925 1650 1200 1200 630
MDS100S-7 2,8 100  7 101,5 V1505 2925 1650 1200 1200 640
MDS125S-7 3,5 125  7 101,5 V1505 3065 1800 1500 1350 810
MDS130S-8 3,7 132  8 116 JE493 3065 1800 1500 1350 810
MDS185S-7 5,18 185  7 101,5 JE493 3200 1900 1740 1660 950
MDS185S-10 5,18 185  10 145 JE493 3050 1900 1740 1660 950
 
Middle Series  (Low&Medium pressure)
Middle Series  (Low&Medium pressure) FAD Pressure Engine model Dimensional Date(mm)
m3/min cfm Bar psig length width height weight(kg)
model with tow bar without tow bar
MDS265S-7 7,42 265  7 101,5 JE493 3629 2200 1700 1470 1200
MDS300S-14 8,4 300  14 203 4BTA3.9 3850 2600 1810 2378 1800
MDS350S-10 9,9 354  10 145 4BT3.9 3850 2600 1810 2378 1800
MDS390S-7 11 393  7 101,5 4BTA3.9 3850 2600 1810 2378 1800
MDS390S-13 11 393  13 188,5 QSB4.5 3850 3100 1810 2378 1980
MDS429S-7 12 429  7 101,5 4BTA3.9 3850 2600 1810 2378 1800
MDS429S-14 12 429  14 203 QSB4.5 3850 3100 1810 2378 1980
MDS500S-14 14,1 504  14 203 6BTAA5.9 4550 3600 1810 2378 3100
MDS690S-14 19,3 689  14 203 QSB6.7 4950 3300 2170 2620 3500
MDS720S-10 20,2 721  10 145 QSB6.7 4950 3300 2170 2620 3500
MDS750S-12 21 750  12 174 QSB6.7 4950 3300 2170 2620 3500
MDS786S-10.3 22 786  10,3 149,35 QSB6.7 4950 3300 2170 2620 3500
MDS820S-14 23 821  14 203 6LTAA8.9 5300 4200 2170 2630 5200
MDS850S-8.6 24 857  8,6 124,7 6CTAA8.3 5300 4200 2170 2630 4600
MDS900S-7.1 25,3 904  7,1 102,95 6CTA8.3 5300 4200 2170 2630 4600
 
Middle Series (Medium&High pressure)
Middle Series (Medium&High pressure) FAD Pressure Engine model Dimensional Date(mm)
m3/min cfm Bar psig length width height weight(kg)
model with tow bar without tow bar
MDS460S-17 13 464  17 246,5 6BTAA5.9 4600 3500 1800 2230 3500
MDS620S-17 17,4 621  17 246,5 6LTAA8.9 5300 4200 2170 2630 5200
MDS650S-19 18,2 650  19 275,5 QSL8.9 5300 4200 2170 2630 5200
MDS690S-20.4 19,4 693  20,4 295,8 6LTAA8.9 5300 4200 2170 2630 5200
MDS770S-21 21,6 771  21 304,5 6LTAA8.9 5300 4200 2100 2630 5280
MDS830S-18 23,2 830  18 261 6LTAA8.9 5300 4200 2100 2630 5280
MDS820S-25 23 821  25 362,5 QSM11 5300 4200 2100 2630 5600
MDS860S-20.4/17.3 24,2 864  20,4 295,8 QSL8.9 5300 4200 2100 2630 5280
24,2 864  17,3 250,85
MDS875S-23 24,5 875  23 333,5 QSM11 5300 4200 2100 2630 5600
 
Large Series    (Low&Medium pressure)
Large Series    (Low&Medium pressure) FAD Pressure Engine model Dimensional Date(mm)
m3/min cfm Bar psig length width height weight(kg)
model with tow bar without tow bar
MDS900S-14.2/10.5 25,1 896  14,2 205,9 6LTAA8.9 5300 4200 2100 2630 5280
25,2 900  10,5 152,25
MDS910S-14 25,6 914  14 203 6LTAA8.9 5300 4200 2100 2630 5280
MDS970S-10 27,2 971  10 145 QSL8.9 5300 4200 2100 2630 5280
MDS1011S-8.6 28,3 1011  8,6 124,7 QSL8.9 5300 4200 2100 2630 5280
MDS1054S-12 29,5 1054  12 174 QSL8.9 5300 4200 2100 2630 5280
MDS1250S-8.6 35 1250  8,6 124,7 QSL8.9 5300 4200 2100 2630 5280
MDS1400S-13 40 1400 13 188,5 QSZ13 6200 4700 2100 2630 5800
MDS1600S-10.3 45 1600 10,3 149,35 QSZ13 6200 4700 2100 2630 5800
MDS1785S-13 50 1785 13 188,5 QSZ13 6200 4700 2100 2630 5800
MDS2140S-10 60 2142 10 145 QSZ14 7400 5400 2230 2630 8400
 
Large Series    (Medium&High pressure)
Large Series    (Medium&High pressure) FAD Pressure Engine model Dimensional Date(mm)
m3/min cfm Bar psig length width height weight(kg)
model with tow bar without tow bar
MDS900S-20 25,3 904  20 290 QSM11 5300 4200 2100 2630 5800
MDS960S-18 26,9 961  18 261 QSM11 5300 4200 2100 2630 5800
MDS1000S-35 28,2 1000 35 507,5 QSZ13 6200 4700 2100 2630 7200
MDS1089S-25 30,5 1089  25 362,5 QSZ13 6200 4700 2100 2630 7200
MDS1200S-24 33,6 1200  24 348 QSZ13 6200 4700 2100 2630 7200
MDS1250S-21 35 1250  21 304,5 QSZ13 6200 4700 2100 2630 7200
MDS1250S-25 35 1250  25 362,5 QSZ13 6200 4700 2100 2630 7200
MDS1250S-30 35 1250 30 435 WP17G770E302 6200 4700 2100 2630 7800
MDS1250S-35 35 1250 35 507,5 WP17G770E302 6200 4700 2100 2630 7800
MDS1250S-40 35 1250 40 580 WP17G770E302 6200 4700 2100 2630 7800
MDS1428S-18 40 1428 18 261 QSZ13 6200 4700 2100 2630 7200
MDS1428S-35 40 1428 35 507,5 TAD1643VE-B 7400 5500 2180 2650 10000
MDS1428S-40 40 1428 40 580 QSK19 7400 5500 2180 2650 10000
MDS1600S-25 44,8 1600 25 362,5 WP17G770E302 7400 5500 2180 2650 10000

 

GTL Air compressor test system

 

After-sales Service: Online
Warranty: 1year
Lubrication Style: Lubricated
Cooling System: Water Cooling
Power Source: Diesel Engine
Cylinder Position: Vertical
Customization:
Available

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air compressor

Are There Oil-Free Screw Compressors Available?

Yes, oil-free screw compressors are available in the market to cater to applications where oil contamination is a concern. Here’s a detailed explanation:

Oil-free screw compressors, as the name suggests, are designed to operate without the use of lubricating oil in the compression chamber. These compressors offer several advantages in industries where oil-free compressed air or gas is required, such as in food and beverage, pharmaceutical, electronics, and certain manufacturing processes.

The key features and considerations of oil-free screw compressors include:

  • 1. Specialized Design: Oil-free screw compressors are designed with specialized materials, coatings, and sealing systems to eliminate the need for lubricating oil in the compression process. The rotors and other internal components are constructed to ensure minimal friction and wear, even in the absence of oil.
  • 2. Dry Compression: Unlike lubricated screw compressors, oil-free screw compressors rely on dry compression methods. The compression chamber is designed to achieve compression without the presence of oil, ensuring that the discharged air or gas is free from oil contaminants. This is particularly critical in industries where oil contamination can have detrimental effects on product quality or equipment performance.
  • 3. Sealing Technology: Oil-free screw compressors employ advanced sealing technologies to prevent air or gas leakage between the high-pressure and low-pressure sides of the compressor. These sealing systems ensure efficient compression while maintaining the required clearances between the rotors and the compressor housing.
  • 4. Cooling Systems: Oil-free screw compressors utilize alternative cooling methods, such as air or water cooling, to dissipate the heat generated during compression. Efficient cooling is crucial to prevent overheating and ensure reliable operation.
  • 5. Filtration Systems: Oil-free compressors often incorporate high-quality filtration systems to remove particulates, moisture, and other contaminants from the incoming air or gas. These filtration systems help maintain the integrity of the compressor and ensure the delivery of clean, oil-free compressed air or gas.
  • 6. Application-Specific Solutions: Oil-free screw compressors are available in various sizes and configurations to meet specific application requirements. They can be tailored to deliver the desired air or gas flow rates, pressures, and purity levels.

It’s important to note that oil-free screw compressors generally have higher initial costs compared to lubricated compressors due to their specialized design and materials. However, they offer benefits such as reduced maintenance, minimized risk of oil contamination, and compliance with stringent industry standards or regulations.

When considering an oil-free screw compressor, it’s crucial to assess the specific application needs, air quality requirements, and operating conditions. Consulting with manufacturers or suppliers can help in selecting the most suitable oil-free screw compressor for a particular industry or process.

In summary, oil-free screw compressors are available and offer a reliable and efficient solution for applications where oil-free compressed air or gas is essential. These compressors are designed with specialized features to ensure dry compression, reliable sealing, effective cooling, and high-quality filtration.

air compressor

How Do You Troubleshoot Common Issues with Screw Compressors?

Troubleshooting common issues with screw compressors involves a systematic approach to identify and resolve problems that may arise during operation. Here’s a detailed explanation:

1. Gather Information:

  • Start by gathering information about the symptoms and any recent changes or events related to the compressor. This can help pinpoint potential causes and guide the troubleshooting process.

2. Check Power and Controls:

  • Ensure that the compressor has a power supply and that all electrical connections are secure. Check for any tripped breakers or blown fuses. Verify that the compressor’s controls, such as pressure switches, temperature sensors, and safety devices, are functioning correctly.

3. Inspect for Leaks:

  • Check for any visible leaks in the compressed air system, including connections, fittings, hoses, and seals. Leaks can cause a drop in system pressure and affect the compressor’s performance. Repair or replace any damaged components.

4. Monitor Pressure and Temperature:

  • Monitor the discharge pressure and temperature of the compressor. Abnormal readings can indicate issues such as inadequate lubrication, high discharge temperatures, or problems with the cooling system. Refer to the manufacturer’s specifications for acceptable pressure and temperature ranges.

5. Verify Lubrication:

  • Ensure that the compressor’s lubrication system is functioning correctly. Check oil levels and the condition of the lubricant. Inadequate lubrication can lead to increased friction, overheating, and damage to internal components. Follow the manufacturer’s recommendations for lubricant type and change intervals.

6. Check Air Filters and Cooling System:

  • Inspect and clean or replace the air filters to ensure proper airflow. Clogged filters can reduce efficiency and increase the compressor’s operating temperature. Additionally, check the cooling system, including fans and heat exchangers, to ensure they are clean and functioning correctly.

7. Examine Vibration and Noise:

  • Pay attention to any unusual vibration or noise coming from the compressor. Excessive vibration may indicate misalignment, worn bearings, or loose components. Unusual noise can be a sign of mechanical issues or problems with the intake or discharge system.

8. Review Maintenance Records:

  • Review the compressor’s maintenance records to ensure that regular maintenance tasks, such as oil changes, filter replacements, and inspections, have been performed according to the manufacturer’s recommendations. Address any overdue or missed maintenance tasks.

9. Consult Manufacturer Documentation:

  • Refer to the compressor’s operating manual and troubleshooting guide provided by the manufacturer. These documents often contain specific troubleshooting steps for common issues and can provide valuable insights.

10. Seek Professional Assistance:

  • If the troubleshooting steps do not resolve the issue or if you are unsure about performing further diagnostics, it is recommended to seek assistance from a qualified technician or contact the compressor manufacturer’s technical support.

Remember to prioritize safety throughout the troubleshooting process, following appropriate lockout/tagout procedures and wearing the necessary personal protective equipment.

In summary, troubleshooting common issues with screw compressors involves checking power and controls, inspecting for leaks, monitoring pressure and temperature, verifying lubrication, checking air filters and cooling systems, examining vibration and noise, reviewing maintenance records, consulting manufacturer documentation, and seeking professional assistance when needed. By following a systematic approach, it is possible to identify and resolve common problems with screw compressors, ensuring their proper operation and performance.

air compressor

How Does a Screw Compressor Work?

A screw compressor operates based on a unique rotary positive displacement principle. Here’s a detailed explanation:

Working Principle:

A screw compressor consists of two helical rotors, typically referred to as male and female rotors, that rotate in opposite directions within a housing. The rotors have specially designed profiles that interlock with each other, creating a series of compression chambers as they rotate. The compression chambers gradually reduce in volume as the rotors rotate, compressing the air or gas trapped inside.

Suction Process:

The suction process begins when the rotors start rotating. As they rotate, the helical lobes or threads on the rotors create expanding spaces between them. The expanding spaces draw in the air or gas from the inlet port, allowing it to enter the compression chamber. The suction process continues as the rotors rotate, and the expanding spaces move the air or gas towards the discharge side of the compressor.

Compression Process:

As the air or gas enters the compression chamber, it gets trapped between the interlocking lobes or threads of the rotors. As the rotors continue to rotate, the trapped air or gas is carried along the length of the rotors. The volume of the compression chamber gradually decreases as the lobes or threads of the rotors intermesh, compressing the air or gas. The compression process is continuous and smooth as the air or gas moves from the suction side to the discharge side of the compressor.

Discharge Process:

Once the air or gas reaches the discharge end of the compression chamber, it is pushed towards the outlet port. The compressed air or gas is then released from the compressor through the outlet port to be used for various applications.

Oil-Injected and Oil-Free Variants:

Screw compressors are available in both oil-injected and oil-free variants. In oil-injected screw compressors, a small amount of lubricating oil is injected into the compression chamber. The oil provides lubrication, cooling, and sealing between the rotors, reducing friction and minimizing wear. The oil-injected variant is commonly used in industrial applications where a small amount of oil in the compressed air is acceptable.

Oil-free screw compressors, on the other hand, are designed to operate without the need for oil lubrication. These compressors use specialized rotor coatings, such as PTFE (polytetrafluoroethylene) or other non-stick materials, to reduce friction and eliminate the need for oil. Oil-free screw compressors are preferred in applications that require oil-free and contaminant-free compressed air, such as in the food and beverage, pharmaceutical, and electronics industries.

In summary, a screw compressor works by utilizing interlocking helical rotors to compress air or gas. The rotating rotors draw in the air or gas during the suction process, and as they rotate, the trapped air or gas is compressed within the compression chamber. The compressed air or gas is then discharged from the compressor. Screw compressors are available in oil-injected and oil-free variants, catering to different application requirements.

China Hot selling China Lubricated CHINAMFG 3330X1750X1640mm Rotary Screw Air Compressors Diesel Compressor with High Quality   air compressor oilChina Hot selling China Lubricated CHINAMFG 3330X1750X1640mm Rotary Screw Air Compressors Diesel Compressor with High Quality   air compressor oil
editor by CX 2023-10-19

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