7.0 INSTALLATION
7.5 SEA WATERCOOLED UNITS (SELECTED UNITS ONLY)
Water cleanliness is extremely important. Strainers are available from Ingersoll Rand. Cleaning of coolers as a result of fouling is a customer responsibility.
Isolation valves with side drains should be installed on both the inlet and outlet lines.
A normally closed solenoid valve is fitted to the water outlet side of the compressor package.
It is important to ensure that the recommended flow rate cannot be exceeded. This will normally mean that an orifice plate must be fitted in the pipework at least 1m (3.3ft) before the cooler, with the orifice size calculated to ensure that the maximum sea water flow rate cannot be exceeded. If these precautions are not taken, it is possible that the sea water flow rate through the cooler may be several times the recommended maximum, which will lead to rapid failure.
Sea Water Pressure Bar | Orifice diameter in mm | |
(psi) | (inch) to give a maximum | |
|
| sea water flow of 90l/min |
|
| (23.76 US gall/min) |
3 (43.5) | 12 (0.472) | |
4 | (58) | 11 (0.433) |
5 (72.5) | 10 (0.394) | |
6 | (87) | 9.6 (0.378) |
7 (101.5) | 9.2 (0.362) | |
8 (116) | 8.9 (0.35) | |
9 (130.5) | 8.7 (0.343) | |
10 | (145) | 8.4 (0.33) |
No oil cooler manufacturer can guarantee that its products will have an indefinite life and for this reason, we suggest that the cooling system is designed to minimize any damage caused by a leaking oil cooler. This can be achieved as follows ;
1.The oil pressure should be higher than the sea water pressure, so that in the event of a leak occurring, the oil will not be contaminated.
2.If the sea water pressure is 100PSIG (7BARG) or above it is recommended that the water solenoid valve is changed to the water inlet side. This will protect the system from high pressure surges when not in use.
3.The sea water outlet pipe from the cooler should have a free run to waste.
IRN37 - 160K - CC & IRN50 - 200H & IRN75 - 160K - 2S & IRN - 100 - 200H - 2S & IRN 250 - 300H - 2S | 25 | |
http://air.irco.com | ||
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