Centrailised Compressed air system for Indus complex:
Group is involved in design, Operation and maintenance of centralised compressed air system for Indus complex Compressed air is required in Indus complex for operating various devices installed in the Indus-1, Indus-2 ring, TL-3 area and Experimental hall. All these devices require uninterrupted supply of instrument quality air.
These devices with respective air requirements are listed in the table below:
Name |
Nos. |
Location in IAC |
Pressure/Flow requirement |
RF shielded gate valves |
10 |
Equispaced along the Indus-2 ring |
~ 6 kg/cm2 |
Pneumatic actuators on Beam Profile Monitors |
19 |
11 nos. along Indus-2 ring + 8 nos. alomg TL-3 |
4-6 kg/cm2 |
RF cavity input power coupler + Cavity cooling rack |
4 |
Indus-2 ring + RF power supply area |
1 cubic meter/hr at
7.5 kg/cm2 (cavity cooling rack)
20 LPM at 0.5 -2 bar (power coupler |
Pneumatically controlled gate valves and safety shutters |
~250 |
10 nos. per front end and beamline ( total 270 FEBL’s are there) |
~ 6 kg/cm2 |
Transfer Line-3 beam shutter |
1 |
TL-3 beginning |
5 kg/cm2 |
Air bearing for beam line experimental station |
3 |
Experimental hall |
0.5 -2 kg/cm2 at 25 lpm |
Radiation shielding door |
1 |
TL-3 tunnel |
5 kg/cm2 |
Compressors are installed in the open area between Indus-1 and Indus-2 buildings. To ensure uninterrupted supply of compressed air and even out the pressure surges coming from the compressor, a receiver of 1m3 nominal capacity is installed downstream from the compressors.
The air is distributed from receiver to the end user through 1” nominal size piping made of stainless steel grade AISI 304. Total length of piping is about 170 meters in ring area, 70 meters in TL-3 and 160 meters in experimental hall. Total 32 nos. of outlets are provided in Ring and TL-3 area to distribute the air. At every outlet the air flow is controlled by a lever operated ball valve of ½ inch nominal bore. Compressor is working in automatic mode on round the clock basis within following pressure limits: Cut- in pressure: 6.5 kg/cm2 Cut- out pressure : 7.5 kg/cm2
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Photographs of Compressed Air system installed at Indus accelerator complex
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Following instrumentation has been used in the compressed air system for IAC:
- Both the compressors are connected to the distribution header using solenoid operated valves. Hence the compressors can be switched over easily and safely.
- Timer based solenoid operated drain valve is installed at the receiver for automatic drain out of condensate from the receiver.
- All the filters are fitted with auto drain valve for removal of contaminants.
- A timer system is fitted with the compressor to prevent over run of motor.
- Pressure transmitters are installed at many locations in the ring area pipeline. The pressure signal is displayed on PC console in control room. Fig. 1 shows the location of pressure transmitters in the ring tunnel and TL-3 tunnel pipelines.
- Compressor running status is displayed on PC console in Indus control room
- Compressor status and a control box with power reset button is installed in front of Control room entrance.
- Over pressure and under pressure alarm signals are provided in the control room
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