Screw Compressors

Discussion GroupAPI Standard 619 for screw compressors Wet and dry Silencers for dry screw compressors Noise reduction methods Lubricants and lubricant carryover for flooded screw compressor Over-compression and under-compression Pulsation and vibration issue

Screw Compressors

Discussion Grou

Cavitation/NPSH (Field Problems)

Discussion GroupUnexpected cavitation erosion Key parameters to consider for Root Cause Analysis when experiencing cavitation damage NPSHR, NPSHA, NPSH margin Performance loss due to insufficient NPSHA (margin) NPSH 40,000 hours Cavitation erosion rate and impeller life assessment Impact of dissolved and/or entrained gas Pumping hot water or hydrocarbons Reliability of operating with low NPSHA on hydrocarbons High cavitation-resistant materials Common types of pump cavitation, including: sheet cavitation, suction recirculation induced vortex cavitation, corner (vortex) cavitation, and tip vortex cavitation Suction specific speed Field cases (suggested by audience) : Quick fix and ultimate solutio

Initial Concept of Operations for Full Management by Trajectory

This document describes Management by Trajectory (MBT), a concept for future air traffic management (ATM) in which flights are assigned four-dimensional trajectories (4DTs) through a negotiation process between the Federal Aviation Administration (FAA) and flight operators that respects the flight operator's goals while complying with National Airspace System (NAS) constraints

Monitoring Vibration and Other Critical Machine Conditions

Discussion GroupSuggested Topics: Condition monitoring methods Effectiveness of condition monitoring on rotating equipment Value of, and ROI of, condition-based monitoring Vertical pump monitoring Below ground monitoring in vertical pumps Vertical pump vibration standards Vertical turbine pump structural resonance analysis Vibration test methods and proper use Standard locations for vibration measurement on horizontal machinery Wireless devices: radio noise, effectiveness, experiences, security Troubleshooting methods and fix options Operating Deflection Shapes and integration with condition-based monitoring Finite element analysis application in support of selection, and troubleshooting Rotordynamics Hydraulically-induced vibration: structural, system, rotor Hydraulic and aerodynamic system issues, including acoustics Measurement of severity of unsteady cavitation conditions Effect of high GVF (gas volume fraction) in centrifugal pumps Mechanical installation (e.g. piping, foundation, alignment) issues Modular pump installations, i.e. experience with non-grouted baseplates Seals and bearings how they affect vibratio

Monitoring Vibration and Other Critical Machine Conditions

Discussion Grou

Screw Compressors

Discussion GroupAPI Standard 619 for screw compressors Wet and dry Silencers for dry screw compressors Noise reduction methods Lubricants and lubricant carryover for flooded screw compressor Over-compression and under-compression Pulsation and vibration issue

Cavitation/NPSH (Field Problems)

Discussion GroupUnexpected cavitation erosion Key parameters to consider for Root Cause Analysis when experiencing cavitation damage NPSHR, NPSHA, NPSH margin Performance loss due to insufficient NPSHA (margin) NPSH 40,000 hours Cavitation erosion rate and impeller life assessment Impact of dissolved and/or entrained gas Pumping hot water or hydrocarbons Reliability of operating with low NPSHA on hydrocarbons High cavitation-resistant materials Common types of pump cavitation, including: sheet cavitation, suction recirculation induced vortex cavitation, corner (vortex) cavitation, and tip vortex cavitation Suction specific speed Field cases (suggested by audience) : Quick fix and ultimate solutio

Monitoring Vibration and Other Critical Machine Conditions

Discussion Grou

Monitoring Vibration and Other Critical Machine Conditions

Discussion GroupSuggested Topics: Condition monitoring methods Effectiveness of condition monitoring on rotating equipment Value of, and ROI of, condition-based monitoring Vertical pump monitoring Below ground monitoring in vertical pumps Vertical pump vibration standards Vertical turbine pump structural resonance analysis Vibration test methods and proper use Standard locations for vibration measurement on horizontal machinery Wireless devices: radio noise, effectiveness, experiences, security Troubleshooting methods and fix options Operating Deflection Shapes and integration with condition-based monitoring Finite element analysis application in support of selection, and troubleshooting Rotordynamics Hydraulically-induced vibration: structural, system, rotor Hydraulic and aerodynamic system issues, including acoustics Measurement of severity of unsteady cavitation conditions Effect of high GVF (gas volume fraction) in centrifugal pumps Mechanical installation (e.g. piping, foundation, alignment) issues Modular pump installations, i.e. experience with non-grouted baseplates Seals and bearings how they affect vibratio