SWT Series Oil-free Screw Air Compressor
SWT Series Oil Free ScrewAir Compressor , works on a dry compression principle and no lubricating oils are required throughout the entire compression process. The series is ISO8573.1 Class 0 certified and supplies 100% oil-free compressed air. It is designed with a sophisticated processing rotor, gear drive, and a reliable seal combination to provide high quality compressed air.Air Compressor has long lifespan and a wide scope of applications. The unit is CAD integrated, designed, and made;Air Compressor employs advanced patented VDT dew point control to monitor the temperature and humidity of the compressed air and to enhance compression efficiency. The drawer-type design enables easy maintenance and repair.
The SWTII 75 to SWTII 250 compressors are designed to run on operating pressure ranging from 7.0 to 10.0kg/cm2G and are complete with water-cooling models. The discharge volume ranges from 18.7m3/min to 41.7m3/min to supply 100% oil-free clean compressed air.
Unique Design, the Best Efficiency
Our design is to reduce the pressure loss and improve cooling effect for unnecessary pressure loss and heat consumption. SWTII oil-free dry screw air compressor provide more air production so that it means oil-free dry screw air compressor not only saves energy but also have a reliable operation.
Create the Ultimate Oil-free Effect
Ultra-thin Coating
We use the International Patent Technology of super thin coating which possess amazing adhesive force and durability, and the light weight of the coating itself prevents the possibility of shedding.
Corrosion Resistance Test
Carbon Steel + Coating
Stainless Steel + Coating
Large Capacity, Low Pressure Drop – Cooler
Larger cooling area not only provides higher heat exchange efficiency but also preserve enough area for compressed air directly flows through cooler. Lower pressure drop makes higher compression efficiency.
High Load Capacity Bearings
Increasing the service life of bearings by using special Anti-wear bearings, easy to carry any loads and the optimization of mechanics design.
High-level Gears
Using high-level gears and installing the special patented seals from the input side of drive gear for preventing lubricant flows into compression room in order to make sure 100% oil-free.
The Unique Auxiliary Oil Pump
Providing enough lubricant oil pressure when start and stop air compressor.
100% Oil-free Compression Guarantee
Two atmospheric intake holes structure patented design which can guarantee 100% oil free for preventing lubricant oil flows from shaft seal and mixes with compressed air, even operates in long time unloading.
Large Diameter Low Pressure Loss – Inlet Valve
Using diaphragm intake valve to adjust the pressure from 0.1Mpa down to 0.05Mpa to prevent power consumption caused by increased pressure.
Air Inlet Channel
● The unique air intake box and tunnel design minimizes the pressure loss and steady air intake temperature for increasing compression efficiency.
● Air flows through a path of suppression before air filter to minimize noise.
Energy Saving Logic Control
● On the basis of the service condition to operate the optimal control.
● It will conduct smart unloading when loading operation exceeds 23 seconds of adjustment period.
● Transferring to unloading operation by using the smallest pressure which could prevent the energy consumption from increasing pressure.
All-in-one Casting Decreases Mechanical Loss
● Directly drove by gears between airend and motor.
● There is no coupling and bearings in order to decease mechanical loss.
Drain Solenoid Valve, No Pressure Loss
● Middle cooler and after cooler used by the timer and solenoid valve to conduct forced drainage.
● Solenoid valve could control unnecessary power loss and prevent system pressure decreasing when draining condensed water.
Standard Oil Mist Filter
● Built-in the air compressor so that no need to install any additional pipeline outside the air compressor chamber.
● Over 99% lubricant oil will flow back to oil tank after separation. High separation efficiency and energy saving.
Low Noise
● The unique acoustic cladding and Suppressor equipment reduce the noise from the source.
● Airend, motor and cooler all install on the same anti-vibration mount with high quality pads in order to minimize the vibration.
Simple Management by using Control System
● Big LCD panel makes daily management easily, monitor messages, display repair and maintenance, unusual shutdown, alarm, and etc, which can effectively deal with any emergency problems.
● All SWT series built in full function of electronic monitoring system which can adjust settings, data operations management, chart display, confirmation record, and make daily and monthly report on the screen.
Easy Repair and Maintenance
Outside and Inside air compressor parts all neatly arranged so that it’s easy to repair and maintenance.
Easy Wash – Shell-and-tube Cooler
● Water flows in the tube and the scale can be easily washed.
● Drawer type design, easy to repair and maintenance.
Oil Filling Port
● Open one door only and fill the lubricant oil easily.
● No need to touch the motor and go inside the air compressor.
Product Characteristics
Make Stabile Pressure for Energy Saving
Variable frequency drive can instantly react the service condition of air flow which can provide and steady the pressure under ±0.1kg/cm2 to save 35% energy consumption.
Variable Frequency Drive Starting
Instead of traditional direct starting, Y-Δ starting, variable frequency drive soft starting and stable linear operation significantly extend service life of contactor, motor and airend which can reduce the impact on circuit and power.
Extremely Oil Free Full Performance Optimization
Tilting Single-channel Cooler
This design could ensure the condensed water is discharged and combine with a centrifugal fan to reduce heat effect and increase the durability of cooler.
Motor
● Interior Permanent Magnet Motor (IPM)
It corresponds to all variable load by controlling the speed to reduce the heat consumption, even in low load.
● IE3 Motor (IM)
This is the best motor of the standard and basic load air compressor for load/unload control and multiple interlock control.
The Effective Cooling of 3BOX Heat Discharge Structure
3BOX structure is divide into cooler box, motor intake box and air intake box which ensure effective cooling and high durability, even a long time operation in 45℃.
Air Cooler Perspective
① Motor (IPM/IE3)
② Centrifugal Fan
③ Oil Cooler
④ Inter Cooler
⑤ After Cooler
⑥ Discharge Silencer
⑦ Suction Silencer
Air Cooler - Flow Chart
① 1st suction temperature sensor
② 1st suction silencer
③ Suction filter
④ Bow off silencer
⑤ Capacity control valve
⑥ 1st suction pressure sensor
⑦ 1st stage airend
⑧ 1st discharge temperature sensor
⑨ 1st discharge silencer
⑩ Inter cooler
⑪ Safety valve 1
⑫ 2nd suction pressure sensor
⑬ 2nd suction temperature sensor
⑭ 2nd stage airend
⑮ 2nd discharge silencer
⑯ 2nd discharge temperature sensor
⑰ Shuttle valve
⑱ After cooler
⑲ Drain separator
⑳ Safety valve 2
㉑ Suction pressure sensor
㉒ Discharge temperature sensor
㉓ Oil tank
㉔ Oil pump
㉕ Relief valve 1
㉖ Oil Cooler
㉗ Relief valve 2
㉘ Oil filer
㉙ Oil temperature sensor
㉚ Oil pressure sensor
㉛ Thermo valve
㉜ Two-way solenoid valve (Inter Cooler)
㉝ Two-way solenoid valve (Drain separator)
㉞ Cooling fan
Low Pressure Drop of Plate-fin Cooler
● The temperature of discharge is lower than SWTII and air loss is 1/5 of shell and tube cooler by using low pressure drop cooler.
● Due to the decrease in discharge temperature, it’s an advantageous for air dryer selection, save the loss of regeneration air, and improve the consumption of air piping system.
Old SWTII discharge temperature: Cooling water temperature +9~15℃
New SWTIII discharge temperature: Cooling water temperature +less then 8℃
● A global pressure vessel design (Except GB and JIS, suitable for ASME)
● Cooler still has enough capacity to keep operate, even in the 40℃ inlet water temperature.
● Standard stainless steel pipe, high corrosion resistance.
Water Cooler Perspective
① Controller
② Suction filter
③ Oil filter
④ Oil cooler
⑤ Inter cooler
⑥ After cooler
⑦ Capacity control valve
⑧ Discharge silencer
⑨ Suction silencer
Water Cooler - Flow Chart
① 1st suction temperature sensor
② 1st suction silencer
③ Suction filter
④ Bow off silencer
⑤ Capacity control valve
⑥ 1st suction pressure sensor
⑦ 1st stage airend
⑧ 1st discharge temperature sensor
Safety valve 1
⑩ Inter cooler
⑪ 2nd suction temperature sensor
⑫ 2nd suction pressure sensor
⑬ 2nd stage airend
⑭ 2nd discharge silencer
⑮ 2nd discharge temperature sensor
⑯ Shuttle valve
⑰ After cooler
⑱ Safety valve 2
⑲ Suction pressure sensor
⑳ Discharge temperature sensor
㉑ Oil tank
㉒ Oil pump
㉓ Relief valve
㉔ Oil Cooler
㉕ Oil temperature sensor
㉖ Oil pressure sensor
㉗ Oil filer
㉘ Flow Switch
㉙ Two-way solenoid valve (Intercooler)
㉚ Two-way solenoid valve (Aftercooler)
Low Energy Consumption
(Specific power increased by 3-4%)
On the basis of standard, SWTIII achieved the goal of airend/machine development and performance improvement.
High Efficiency of New Airend
(Performance increased by 2-3%)
● It’s to optimize the middle pressure and minimize the consumption of power.
● By using the coating on the airend surface and shaft seal improvement to optimize the gap of airend.
● Reduce the air leakage from shaft seal.
Machine design that effectively reduces losses
(Performance increased by 1%)
It’s effective to reduce the power consumption through the reduction of pressure drop and auxiliary power by installing IPM motor, IE3 motor or centrifugal fan. Besides, it can optimize the cooler to reduce discharge temperature and miniaturize the parts to achieve the goal of energy saving.
Highly Silence
(Noise valve decreased by 7-10%)
It provides a silent and comfortable workplace with a complete strategy and strict measurement to reduce the specific noise from oil-free air compressor.
● High Quality Noise Prevention Box Structure
The air intake ports are concentrated at one point and install staggered baffles which can effectively reduce noise.
● Acoustic Cladding
Installing the absorbent cotton and high impermeability of sealing structure to reduce harsh frequency and suppress the leakage of noise.
● Silencer
It effective to reduce the noise by a new development of air inlet/outlet Silencer.
Controller
● It’s easier to confirm the operation condition of air compressor with an advanced new type of controller.
● It’s easy have an inspection and setting by using seven-inch touch panel.
● Full protect function.
● Data save and record.
Oil Pump
Oil Pump built-in gear box which drove by high efficiency motor in order to reduce the power consumption. The risk of oil leakage will be reduced due to less piping connection.
Inlet Control Valve
It can perform the energy saving logic control which possesses outstanding reactivity and high durability of air inlet valve. Silencer is installed to reduce the piping design.
Centrifugal Fan
It’s effective cooling by using big air capacity of centrifugal fan. (apply to air cooled air compressor)
Discharge Silencer
In a wide range of frequency band which uses expanded and multiple perforated Silencer to have a noise prevention effect and effective reaction for the fluctuating noise of variable frequency rotation speed control.
Oil-free Screw Air Compressor Technical Data
