Sunday, October 23, 2011

Sunday, November 15, 2009

PUMP FOR NaOCl

The pump for handling NaOCl no suitable with metal as SS 316, but material non metal is very suitable for handling this liquid.

Saturday, May 9, 2009

INPUT DATA REQUIREMENT

For maximum result in the selection of pump, so there are 4 the matters must to required.

1.
LIQUID
  • Liquid name
  • Viscosity (cSt)
  • Temperature (deg C)
  • Specific Gravity
  • PH concentration
  • Vapour Pressure (bar)
  • Solid Content (%)
  • Abrassive liquid? (yes or no)
  • Corrosive Liquid? (yes or no)
2. OPERATION
  • Service / Aplication of pump (intermitten or continue)
  • flow capacity (m3/h)
  • Suction Pressure
  • Discharge Pressure
  • Differentiel Pressure
  • Differential Head
  • Speed
  • NPSH Available
  • Positif or negative suction?
3. ENVIRONMENT
  • Hazardous area or safe area

4. ELECTRICITY
  • Frequency
  • viltage
  • Phase

Sunday, April 26, 2009

FORMULA OF NPSH available

The NPSH (Net Positive Suction Head) Available or NPSH value of the plant defines the total pressure at the pump suction nozzle for given fluid characteristics at certain flow rate.


This below is formula for find the value of NPSH available. :



1.
NPSH A = (P atm - P vp) / rho.g - H static - h loss

for condition of system :
  • Open system with water reservoir below pump.
  • Unpressurized closed system (condition in daerator of B.F.P system)
  • Open system with acetone reservoir above pump, positioned at 900m above sea level

2.
NPSH A = (P atm+ P ov - P vp) / rho.g + H static - h loss


for condition of system :
  • Closed system with over pressure of propane fluid reservoir above pump, positioned at the sea level.

3. NPSH A = (P atm - P vp) / rho.g + H static - h loss


for condition of system :
  • Open system with water reservoir at sea level above pump with different temperature.

4.
NPSH A = (P abs - P vp) / rho.g - H static - h loss


for condition of system :
  • pressurized closed system (condition in daerator B.F.P system).
  • Pressurized closed system (gas condition in pressurized vessel).



Sunday, April 19, 2009

CONTRUCTION OF THE PUMP

Generally constructions of the pumps divided into 6 categories :
  1. Centrifugal Pumps
Based to overhung impeller type centrifugal pump divided :
  • Close Coupled Single Stage-end suction.
  • Close Coupled Single stage-diffuser style- end suction- submersible.
  • Close Coupled Single Stage-submersible
  • Close Coupled Single Stage - In line.
  • Separately Coupled Single stage-In Line-Flexible Coupling.
  • Separately Coupled Single stage-In Line-Rigid Coupling.
  • Separately Coupled Single stage-Frame Mounted-Lined Pump.
  • Separately Coupled Single stage-Frame Mounted.
  • Separately Coupled Single stage-Center Line Support.
  • Separately Coupled Single stage-Wet Pit Volute.
  • Separately Coupled Single stage-Axial Flow Horizontal.
  • Separately Coupled Single stage-Frame Mounted-Mixed Flow.
  • Separately Coupled Single stage-Mixed Flow.
  • Separately Coupled Single stage-Self priming.
  • Separately Coupled Multi stage-Axial Horizontal Split Case.
  • Separately Coupled Multi stage-Axial Vertical Split Case.
  • Separately Coupled Multi stage-Axial Horizontal/Vertical Split Case Double Casing.
  • Side Channel Single Stage.
  • Peripheral Single Stage.
  • Impeller Between bearing-two stage.
2. Vertical Pumps
  • Deep well Pumps.
  • Vertical, Multistage Submersible Pumps
  • Vertical Single or Multistage barrel or can Pumps.
  • Vertical Single or Multistage short setting Open Line Shaft.
  • Mixed Flow Vertical - Open Line Shaft.
  • Vertical, Axial Flow Impeller (Propeller) Type (enclosed Line Shaft Below Floor Discharge Configuration.
3. Rotary Pumps

  • Sliding Vane Pumps.
  • External Vane Pumps.
  • Axial Piston Pumps.
  • Flexible Tube Pumps / Peristaltic Pumps.
  • Flexible Vane Pump.
  • Flexible Linear Pump.
  • Single Lobe Pump.
  • Three Lobe pump.
  • External gear Pump.
  • Internal gear Pump (with crescent)
  • Internal gear Pump (without crescent).
  • Circumferential Piston Pump.
  • Single Screw pump/Progressive Cavity Pump/Eccentric Pump.
  • Screw and Wheel Pump.
  • Two Screw Pump/Double Screw Pump.
  • Three Screw pump/Triple Screw Pump.
4. Sealles Centrifugal Pumps

  • Canned Motor Pumps.
      1. Close Coupled end Suction Overhung Impeller.
      2. Close Coupled, Vertical In line.
      3. Motor and Pump Separated by thermal Barrel.
      4. Vertical Submerged.
  • Magnetic Drive Pumps.
      1. Separately Coupled (Close or Semi-Open Impeller).
      2. Close Coupled (Close or Semi-Open Impeller).
      3. Vertical Submerged (Close or Semi-Open Impeller).
5. Reciprocating Power Pumps
  • Horizontal Single stage -Acting Plunger Power Pump.
  • Vertical Single Stage -Acting Plunger Power Pump.
  • Horizontal Double Stages -Acting Plunger Power Pump.
  • Horizontal Double Stages-Acting Piston Power Pump.
  • Horizontal Triplex Plunger Pump, on Base, Belt Drive.
  • Vertical Triplex Plunger Pump, on base. gear reduction.
  • Liquid End, Horizontal Side Port Piston Pump.
  • Liquid End, Horizontal Valve Plate Piston Pump.
  • Power End, Horizontal Plunger Power pump.
  • Power End, Vertical Plunger Power pump.
  • Power End, Horizontal Duplex power pump With Integral gear.
Type of Piston :
        • Cup
        • Slush
        • Bull and Snap
        • Individual Ring
6. Direct Acting (Steam) Pumps
  • Horizontal Simplex Direct Acting (Steam) Pump.
    • Drive (Steam) End :
1. Side Inlet (Steam) Port.
2.Side Exhaust Port.
    • Liquid End :
1. End Suction.
2.Top Discharge.
  • Horizontal Duplex Direct Acting (Steam) Pump.
  • Double Acting Plunger type Liquid end.
  • Side Valve Port Type Liquid End (End View, Duplex Pump).
  • Drive (Steam) End-Horizontal Duplex Pump.
  • Inside Fixed lost-Motion Valve Gear.
  • Inside Adjustable lost- Motion Valve Gear.
  • Outside Adjustable Lost-Motion valve Gear.

Thursday, April 9, 2009

APPLICATION OF THE PUMP

The pump is a fluid machinery which used for moving fluids (solid : sludge, slurry, mud, and liquid: High Speed Diesel/HSD, pure water, sea water, etc.) with any conditions (cool or hot) from low pressure to high pressure, and the pump is used for circulating of the system.

The Component in Pump System :


  1. Hydraulic, contents : Impeller, Casing, and Shaft.
  2. Driver, electric motor or diesel engine.
  3. Coupling, Coupling Guard (for connection Hydraulic to driver)
  4. Base Plate (for base of the pump system)
  5. Piping System, (pipe and accessories)

Generally, the pump is available used for global industry, because with the pump the process of industry become more easy if using pump.
and as example of industries which using the pumps are :
  • Power generation
  • Oil and Gas
  • Petrochemical
  • Chemical
  • Pulp and Paper
  • Building
  • Marine
  • Mining
  • Water Supply
  • Sewage Treatment,
  • Food and Beverages
  • Refinery
  • Rayon and Textile
  • Steel Industry
  • Air Separation
  • Aggro Industry
  • Cement Industry
  • Sugar Industry
  • Wood Industry
  • etc.
THE POWER GENERATION



In the power generation, usually the pumps used for :

  • Boiler feed water service, usually using type barrel casing pump.
  • Main and auxiliary condensate extraction for general water,usually using type high pressure stage casing pump, vertical or horizontal pump.
  • Fire fighting system.
  • Booster pump for boiler feed pump district heating system water.
  • Boiler circulation, usually using type centrifugal end suction pump.
  • Auxiliary cooling and clean water system, district heating system
  • flue gas cleaning, flue gas desulphurisation, usually using type channel impeller washing pumps
  • Sewage System.
OIL AND GAS
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