Gives the minimum requirements for liquid ring vacuum pump and compressor systems for service in the petroleum, chemical, and gas industries. Includes both vacuum pump and compressor design and system design.
Substitute standard number : API 681 Ed. 1 (1996/R2002)
Standard catalogue :
Section 1 – General
1.1 Scope
1.2 Alternative designs
1.3 Conflicting requirements
1.4 Definition of terms
1.5 References
1.6 Unit conversion
Section 2 – Basic design
2.1 General
2.2 Casings
2.3 Casing connections
2.4 External forces and moments
2.5 Rotating elements
2.6 Mechanical shaft seals
2.7 Dynamics
2.8 Bearings, bearing housings, and lubrication
2.9 Materials
2.10 Nameplate and rotation arrows
Section 3 – System design
3.1 Ring liquid system
3.2 Controls and instrumentation
3.3 Drivers and transmissions
3.4 Couplings and guards
3.5 Belt drives
3.6 Mounting plates
3.7 Piping
3.8 Special tools
Section 4 – Inspection, testing, and preparation for shipment
4.1 General
4.2 Inspection
4.3 Testing
4.4 Preparation for shipment
Section 5 – Vendor’s data
5.1 General
5.2 Proposals
5.3 Contract data
Appendix A – Liquid ring vacuum pump and compressor system data sheets
Appendix B – Liquid ring vacuum pump schematic
Appendix C – Shaft deflection schematic
Appendix D – Liquid ring vacuum pump ring liquid flow schematics
Appendix E – Mechanical seal and piping arrangement schematics
Appendix F – Material list
Appendix G – Liquid ring vacuum pumps and compressors vendor drawing and data requirements
Appendix H – System considerations, operating variables, and test performance conversion
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