robogineer
Mechanical
- Sep 28, 2003
- 3
I'm currently looking forward to eliminate water dip coil testing process for coil testing.
Coil manufacturing process is as such:
For HVAC application the Evaporator and Condenser coils (Heat Exchangers) are manufactured in coil shop.
Our existing process :
1. Assembly coil fins (Aluminum 0.14mm) and copper tubes ( 0.47 mm thick, 7mm or 9.78 mm dia)
2. Expansion of copper tubes
3. Coil drying
4. U-Bend Brazing ( as per coil circuit)
5. Header - distributor brazing
6. Leak testing : By charging dry air at 350 psig into the coil sealed at its ends and dipping in the water tank to find leakage at joints.
7. Coil drying
Do we have an advance equipment that can replace the existing water dipping and consequent water drying.
Remember water dip testing not only detects leakage but it also locates the leakage which can be rectified easily and the coil is then agin sent to testing.
The process is similar to a punctured tyre test. By dipping in the water you can locate the puncture location.
There must be some advance tech which will locate the leakage so as to allow the rectification.
I strongly feel that water dipping is certainly not
the best practice for leak testing.
The disadvantages are as follows:
1. Wet coil
2. Growth of fungus & bacteria in wet coils. (requiring a
heating oven)
3. Foul odor from the coils.
4. Huge testing space requirement.
5. Bottleneck in production line.
Kindly help me in updating myself with the latest trends
followed by the leading companies.
THANKS !
MANISH
Coil manufacturing process is as such:
For HVAC application the Evaporator and Condenser coils (Heat Exchangers) are manufactured in coil shop.
Our existing process :
1. Assembly coil fins (Aluminum 0.14mm) and copper tubes ( 0.47 mm thick, 7mm or 9.78 mm dia)
2. Expansion of copper tubes
3. Coil drying
4. U-Bend Brazing ( as per coil circuit)
5. Header - distributor brazing
6. Leak testing : By charging dry air at 350 psig into the coil sealed at its ends and dipping in the water tank to find leakage at joints.
7. Coil drying
Do we have an advance equipment that can replace the existing water dipping and consequent water drying.
Remember water dip testing not only detects leakage but it also locates the leakage which can be rectified easily and the coil is then agin sent to testing.
The process is similar to a punctured tyre test. By dipping in the water you can locate the puncture location.
There must be some advance tech which will locate the leakage so as to allow the rectification.
I strongly feel that water dipping is certainly not
the best practice for leak testing.
The disadvantages are as follows:
1. Wet coil
2. Growth of fungus & bacteria in wet coils. (requiring a
heating oven)
3. Foul odor from the coils.
4. Huge testing space requirement.
5. Bottleneck in production line.
Kindly help me in updating myself with the latest trends
followed by the leading companies.
THANKS !
MANISH
