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Centrifugal Pumps & Their Mechanical Shaft Sealing Selection , Optimizing , Performance & Troubleshooting

  • Schedule : Online
  • Who is this for: Mechanical Engineering Students , Professionals

Duration: 5-8 Hours
Schedule: Online
Level: Beginner
Rs: 29,000

Course Overview

Objectives

  • To identify different types of centrifugal pumps
  • To understand pump technology & key applications
  • To learn characteristics of pumps & curves
  • To understand the critical elements in pump system design
  • To learn how to correctly demonstrate pump calculations

  • Introduction to & Constructions of Centrifugal Pumps
  • Pump Hydraulics
  • Forces in Centrifugal Pumps
  • Pump Operation & Drivers
  • Pump Specification & Selection
  • Commissioning & Performing Measurements
  • Mechanical Seals Intro , Materials of Seal Construction
  • Seal Design & Classification
  • Environmental Considerations & Auxiliary Equipment
  • Seal Failure
  • Troubleshooting Failed Seals
  • Seal Selection & Standards , Maximize Seal Life

Topics covered are

  • Introduction to good pumps
  • Risk & lifecycle considerations
  • Pump Types & Overview
  • Impeller , casings , wearing ring , bearing housing & isolators , couplings , shaft , stuffing boxes mechanical seals brief
  • Specific gravity , viscosity , vapor pressure
  • Flow head  , system resistance
  •  Pump efficiency, hydraulic power, characteristic curve
  •  Specific speed
  •  Recirculation, cavitations, Net Positive Suction Head (NPSH)
  • Suction specific speed module
  •  Axial trust, radial loads module
  •  Operation and characteristics
  •  Flow capacity control – throttling, speed, impeller trim, swirl and pitch, by-pass
  •  Specifications
  •  Selection perspectives – general, hydraulic, mechanical/electrical, spatial, economical
  •  Testing and commissioning
  •  Condition monitoring
  • Optimizing
  •  Zero leakage definition
  •  Mechanics, purpose and means of sealing
  •  Basics regarding speed, pressure, and seal requirements. 
  • Seal function, wear and live, texture
  • Balance criterion, ratio and pressure distribution
  •  Operating capabilities, classifications and limitations
  •  Materials general consideration
  •  Properties of elastomers, elastomer materials
  • Plastic polymers, cemented carbides and miscellaneous sealing materials
  • Materials comparability
  • Identifying seal components and their function
  •  Primary sealing components – seal head, seal seat, springs for face loading, metal bellows
  • Secondary sealing components –elastomeric O-rings, V-rings, U-cup rings, wedge rings
  • Inside and outside seals
  •  General arrangement modes – Single: cartridge, component, split, stationary – Duplex: tandem, back-to-back
  • Static and dynamic seals
  •  Rotating and stationary seal heads
  • Sealing face conditions, seal pre-loading
  •  Abrasives, heat, dry operation
  •  Flushing, recirculation, quenching
  • Convection, cooling, jacketing
  • Buffer and barrier fluid
  •  Dead end lubrication, grease packing, circulating face lubrication
  •  API 610 environmental control schemes
  • Cyclone separators, pressurization units
  •  Air-coolers and heat exchangers
  • Rotameters and flow controllers
  •  Leakage detectors, filters and strainers
  •  Factors affecting seal performance
  • Seal malfunction and probable causes
  •  Friction and wear, adhesion, abrasion
  • Corrosion and surface fatigue
  •  At the pumping site and equipment teardown
  •  Discoloration, chipping, cracking, rubbing, elastomer swelling, stickiness, hardness – what do these mean?
  •  Seal selection guides
  • Standards-ISO, British, DIN, ASME
  • Preparing the pump – mechanically, hydraulically
  •  Controlling temperature and pressure in the stuffing box
  • What seal to choose? What face combination and elastomer?