EEMUA PUB NO 151
This standard covers the minimum requirements for liquid ringvacuum pumps and compressors for general service. These includebasic design, materials and auxiliary equipment.
A liquid ring machine, whether vacuum pump or compressor, is arotary positive-displacement machine in which gas compression isachieved by the action of a radially bladed impeller mounted in aneccentric or elliptical casing which is partially filled withliquid.
Note : A bullet (o) at the beginning of a paragraphindicates that a decision by the purchaser is required. Thesedecisions should be indicated on the data sheet (see Appendix A ) ;otherwise they should be stated in the quotation request or in theorder.