Description
Explosion-proof screw air compressors are used in hazardous environments such as chemicals, petroleum, mines, etc. They are divided into two categories, screw-type mobile air compressors for coal mines and non-coal (chemical) explosion-proof screw air compressors . It mainly has intake valve, air filter assembly, explosion-proof power distribution device, high-efficiency explosion-proof three-phase asynchronous motor, explosion-proof pressure and temperature transmitter, screw host, oil and gas separator, minimum pressure valve, changer Heater, protection device and various pipelines. The electrical explosion-proof components used in this product comply with the relevant regulations in the national standards GB3836.1-2010, GB3836.2-2010, GB3836.3-2010, GB3836.4-2010, etc., and are products with relevant explosion-proof certificates.
Design requirements
1. The whole machine is explosion-proof.
2. The air inlet filter is a dust and water removal container type catcher.
3. Add flame arresters before inlet and after outlet.
4. Shall be frequency conversion (air source temperature is not fixed).
5. booster head process shall be explosion-proof type.
6. Overall internal circulation design.
7. oil content control.
8. leakage early warning control
9. separate program design rather than standard design.
10. Motors and electrical appliances should be selected according to high standards.
Comparison of BT4 class with normal compressors
| NO. |
Controlled components |
BT4 compressors |
normal compressors |
| 1 |
Explosive medium temperature group T1-T6 |
T1: Gas ignition temperature>450℃ |
/ |
| T2: Gas ignition temperature 300℃<T≤450℃ |
/ |
| T3: Gas ignition temperature 200℃<T≤300℃ |
/ |
| T4: Gas ignition temperature 135℃<T≤200℃ |
/ |
| T5: Gas ignition temperature 100℃<T≤135℃ |
/ |
| T6: Gas ignition temperature 85℃<T≤100℃ |
/ |
| 2 |
BT4 Explosion-proof control box |
protection grade IP65 A21 zone T 80℃ with explosion-proof certificate |
/ |
| 3 |
Motor and Fan |
1. explosion standard ExdIAT4Gb, ExdIBT4Gb |
|
| 2. Protection grade of main housing IP55 and IP65 |
Protection grade of main housing IP23 and IP54 |
| 3. The cooling mode IC411 (Internal and external circulation air cooling and free circulation cooling. The cooling mode of the motor is totally enclosed, and the outer surface is cooled by axial self fan, that is, the motor itself is cooled by fan, and there is no need for external power supply) |
Radial flow ventilation cooling way |
| 4. Insulation grade F |
Insulation grade B or F |
| 5.Rated voltage ：AC400v |
Rated voltage ：380v |
| 6.The junction box with excellent explosion-proof structure and protection grade |
The junction box is located on the right side of the motor |
| 7.Dust explosion-proof: A20, A21, A22, at present, zone 21 is the highest dust explosion-proof grade of dust explosion-proof motor, which can replace zone 22 |
/ |
| 8.explosion-proof certificates are available |
/ |
| 4 |
Emergency stop button |
Protection grade IP65 A21 zone T 80℃ with explosion-proof certificate |
/ |
| 5 |
Control button |
Protection grade IP65 A21 zone T 80℃ with explosion-proof certificate |
/ |
| 6 |
Voice alarm |
Protection grade IP65 A21 zone T 80℃ with explosion-proof certificate |
/ |
| 7 |
cables |
explosion-proof cables |
RVV cables |
| 8 |
Pressure sensor |
Protection grade IP65 A21 zone T 80℃ with explosion-proof certificate |
/ |
Specification
| No |
Model |
Power (kw) |
Speed (rpm) |
Nominal |
Rated |
Voltage (V) (Optional) |
Cooling |
Lubrication |
Explosion -proof grade |
| flow |
exhaust |
method |
method |
| m³/min |
pressure |
(Optional) |
(Optional) |
| 1 |
ENEP- 7.5 |
7.5 |
2980 |
1.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 0.85 |
1.0 |
| 0.65 |
1.25 |
| 2 |
ENEP- 11 |
1 1 |
2980 |
1.5 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 1.0 |
1.0 |
| 0.85 |
1.25 |
| 3 |
ENEP-15 |
15 |
2980 |
2.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 1.5 |
1.0 |
| 1.0 |
1.25 |
| 4 |
ENEP-18.5 |
18.5 |
2980 |
2.9 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 2.0 |
1.0 |
| 1.5 |
1.25 |
| 5 |
ENEP-22 |
22 |
2980 |
3.5 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 3.0 |
1.0 |
| 2.0 |
1.25 |
| 6 |
ENEP-30 |
30 |
2980 |
4.8 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 4.0 |
1.0 |
| 3.0 |
1.25 |
| 7 |
ENEP-37 |
37 |
2980 |
6.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 5.0 |
1.0 |
| 4.0 |
1.25 |
| 8 |
ENEP-45 |
45 |
2980 |
7.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 6.0 |
1.0 |
| 5.0 |
1.25 |
| 9 |
ENEP- 55 |
55 |
2980 |
10.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 8.0 |
1.0 |
| 6.0 |
1.25 |
| 10 |
ENEP- 75 |
75 |
2980 |
13.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 10.0 |
1.0 |
| 8.0 |
1.25 |
| 1 1 |
ENEP- 90 |
90 |
2980 |
16.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 12.0 |
1.0 |
| 8.0 |
1.25 |
| 12 |
ENEP-110 |
110 |
2980 |
20.00 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 16.0 |
1.0 |
| 12.0 |
1.25 |
| 13 |
ENEP-132 |
132 |
2980 |
24.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 20.0 |
1.0 |
| 16.0 |
1.25 |
| 14 |
ENEP-160 |
160 |
2980 |
26.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 24.0 |
1.0 |
| 20.0 |
1.25 |
| 15 |
ENEP-185 |
185 |
2980 |
30.0 |
0.8 |
380/660/1 140 |
Water/Air |
Water/oil |
BT4 |
| 26.0 |
1.0 |
| 24.0 |
1.25 |
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