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22 61 00 COMPRESSED-AIR SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES
.01 Compressed Air Systems
- Air Compressors
- When after coolers are specified on air compressors, they shall be air cooled or shall be cooled with re-circulating process water. Water cooling through equipment to drain is not permitted.
22 62 00 VACUUM SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES
.01 Vacuum Systems
- Vacuum pumps shall be duplex type, similar to Nash Engineering Co.
22 67 00 PROCESSED WATER SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES
.01 High Purity Water Systems
- The University prefers a central steam powered still for projects at University Park.
- Any requirement for a higher grade water will be handled at the point of use, being fed from the central still unit.
- On stills rated 5 gph and over, the steam powered heat exchanger shall be constructed of cupronickel, 10 percent nickel. The manufacturer shall verify in writing that the heat exchanger is so constructed.
- We are picking up large amounts of copper deposits on the boiler tubes, so to eliminate this problem the University requests that no copper heat exchangers be installed.
- Condensing water to drain is not permitted.
- All parts of the still in contact with the steam vapor and distillate shall be tin or tin-coated copper. The tin must be 99.97 percent pure and the coating thickness a minimum of 0.001 inch. Specifications should be written around Barnstead.
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