Two Stage Air Compressor, Oil-injected Rotary Screw Compressor Manufacturer

Two Stage Air Compressor, Oil-injected Rotary Screw Compressor

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Features

High efficient and energy saving screw air-end

The compressor applies a large rotor, which works at a low rotation rate. The precision machining process grants a high rotor profile accuracy, which allows for minimized vibrations and noise. It also improves sealing during the air compressor’s operation.
There are two independent compressing units in one air-end. Undertaken by two units together, the combined system grants lower loads for each bearing than a single unit. This allows for better bearings durability.
Lubricating oil is separately injected into the air compression chamber and the bearings. Then bearings are then injected with clean lubricating oil for better reliability. As a result, the air-end is granted lower compression ratios, lower leakage and better volumetric efficiency.

High efficient rotor

Direct drive large rotor works at low rotation rate, providing good efficiency, low energy cost, and lower inherent leakage;
High efficiency, low noise & vibration;
Bearings with good efficiency are applied, such as cylindrical roller bearing, angular contact ball bearings, etc.
Bearing lifespan ≥ 100,000 hours;
Highly accurate rotor profile grants high performance and reliability.

Premium high efficient motor

The motor applies heavy-duty SKY bearing with port for lubricating oil injection on the housing, which is convenient for maintenance;
IP55 water and dust proof, grants better durability.

Optimized structure

Cold and hot air are separately stored in different chambers, which offers better cooling performances. This grants a longer service life for the air compressor.
Removable enclosure with premium flame retardant & sound-proof sponge, which grants a lower noise during operation. This also makes installation and maintenance very convenient.

Oil separator installed together with after cooler

After cooler is installed next to the oil separator, ensuring reduced installation space & pipeline connection, and high oil separating efficiency.

Atomized oil injection inter-stage cooling design

Atomized oil gets injected for inter-stage cooling and lubricating. this omits the inter-stage cooler and decreases pressure loss. This also grants better cooling efficiency, lubrication performance, lower energy cost, and lower maintenance cost.

Oil stop & vent combined valve

The oil stop & vent combined valve structure ensures the compressor is running at a light load. This decreases the impact on the power grid and increases motor durability.
Helps avoid oil leakage and start-up failure in low-temperature conditions.
Simple structure, convenient for connection, stable & reliable.

Energy-saving air inlet control system

The air compressor features an up-to-date control system and an integrated design combined with air inlet and outlet function, greatly reducing pipeline connection.
Air inlet control system applies unidirectional valve, which turns off automatically when the compressor shuts down or if it stops air supply suddenly. This is to avoid compressed air return and oil-leakage.
Along with an intelligent control system and pressure sensor, the air inlet valve offers airflow on/off control, continuously variable pressure control (60%-100%), along with delay start/stop control.

High quality wear parts

Air filtering element: with special nano-coating applied, airflow goes through the filtering element without the direction being changed. This lessens pressure loss, and grants better filtering accuracy.
Oil separating element: coalescing oil separating element and oil return device ensure that the oil content of outlet air is ≤ 2PPM.

Technical Parameters

Model	Power	Pressure Mpa	Air Displacement m3/min	Noise Level	Air Outlet Size	Dimensions mm LXBXH			Weight	Oil Volume L
	KW			dB(A)	('')				kg
JF-20AⅡ	15	0.7	2.9	64±2	G1½''	1620	1000	1320	680	30
		0.8	2.8
		1	2.4
JF-25AⅡ	18.5	0.7	3.6	65±2	G1½''	1620	1000	1320	720	30
		0.8	3.4
		1	2.9
		1.3	2.5
JF-30AⅡ	22	0.7	4.2	66±2	G1½''	1620	1000	1320	800	30
		0.8	4.1
		1	3.5
		1.3	3.2
JF-40AⅡ	30	0.7	6.2	66±2	G2''	1620	1000	1320	920	30
		0.8	6
		1	4.9
		1.3	4.2
JF-50AⅡ	37	0.7	7.2	68±2	G2''	2000	1250	1670	1000	62
		0.8	7
		1	6.3
		1.3	5.4
JF-60AⅡ	45	0.7	9.8	70±2	G2''	2000	1250	1670	1500	62
		0.8	9.6
		1	7.8
		1.3	6.5
JF-75AⅡ	55	0.7	12.6	69±2	G2''	2000	1250	1670	1600	62
		0.8	12.3
		1	9.6
		1.3	8.6
JF-100AⅡ	75	0.7	17	70±2	G2''	2700	1600	1840	1750	76
		0.8	16.5
		10	12.5
		1.3	11.2
JF-120AⅡ	90	0.7	19.8	72±2	G1½''	2700	1600	1840	2600	76
		0.8	19.2
		1	16.8
		1.3	14.5

Model	Power	Pressure Mpa	Air Displacement m3/min	Noise Level	Air Outlet Size	Dimensions mm LXWXH			Weight	Oil Volume L
	KW			dB(A)	('')				kg
JF-150AⅡ	110	0.7	24	73±2	G1½''	2700	1600	1840	2760	76
		0.8	23.2
		1	19.7
		1.3	17.6
JF-175AⅡ	132	0.7	28.2	75±2	G3''/DN80	3400	1700	1950	3300	90
		0.8	27.7
		1	23.5
		1.3	19.8
JF-200AⅡ	160	0.7	34.5	75±2	G3''/DN80	3400	1700	1950	3400	90
		0.8	33.6
		1	30
		1.3	23.8
JF-250AⅡ	185	0.7	41	76±2	G3''/DN80	3700	1980	2150	4200	125
		0.8	38.6
		1	33
		1.3	28.6
JF-270AⅡ	200	0.7	44.5	76±2	DN100	3700	1980	2150	4300	125
		0.8	43.2
		1	38.5
		1.3	33
JF-300AⅡ	220	0.7	48.6	79±2	DN100	3700	1980	2150	4400	125
		0.8	47
		1	41
		1.3	38
JF-340AⅡ	255	0.7	55	78±2	DN125	4100	2100	2150		190
		0.8	54
		1	46
		1.3	40
JF-380AⅡ	285	0.8	60	80±2	DN125	4100	2100	2150		190
		1	52
		1.3	45
JF-430AⅡ	315	0.8	67	80±2	DN125	4100	2100	2150		200
		1	63
		1.3	51

Note:

Types listed above all apply 380V/50HZ power source, four-pole motor; Start-up: frequency variable or Y-△; All types using 60HZ power source are unlisted.