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INTRODUCTION OF THE KING COBRA™ PERISTALIC HOSE PUMPS. Sizes Available: 10mm (3/8”) through 102mm (4”). PRINCIPLE. Pulsating flow is generated by the pushing action of shoes on the wall of the elastomeric hose. Shoes are assembled on a rotating wheel. - PowerPoint PPT Presentation
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INTRODUCTION OF THE KING COBRA™ PERISTALIC HOSE PUMPS
Sizes Available: 10mm (3/8”) through 102mm (4”)
PRINCIPLE
• Pulsating flow is generated by the pushing action of shoes on the wall of the elastomeric hose.
• Shoes are assembled on a rotating wheel.
• The rotating action of the wheel compresses the elastomeric hose and pushes the fluid being pumped downsteam.
• Frictions between shoes and hose are reduced by using a lubricant which also acts as a coolant.
KING COBRA ADVANTAGES
• Seal-less construction• Self-priming pump with high suction lift up to 9m (29.5’) of water• Dry-run capable• Abrasive products• Excellent volumetric capacity (dosing)• Particles up to 15% (compressible solids) or 25% (non-compressible solids) of
hose I.D.• Reversible pump• Ease of Maintenance
HOSE PUMPS COMPETITORS
Allweiler Elro Ragazzini
Boyser Iwaki Verder
Bredel PCM-Delasco Watson-Marlow
Pondorf
Hose Life Depends On...
• Differential Pressure• Rotation Speed• Hose Material
• Natural Rubber (N): 6 ; EPDM (E): 3 ; Buna-N (B): 2• Liquid Temperature• Service (Intermittent/Continous)• Correct Ext DN Rectifying • Correct Shimming
HOSE
• Not enough hose compression = Internal recirculation of fluid, as well as, premature wear of the hose.
• Too much hose compression = Unnecessary brake power, and Lower Hose Life
• 1mm extra shimming may increase hose compression by 2 (4 to 8 tons)
CORRECT SHIMMING
HOSE LIFE
Tests done on KC65 natural rubber hose on water @ 70°F on continuous duty
3985751029
2740
4100
5840
42103521
1321
2850
1562
9521680
1195710
215 Psi175 Psi
130 Psi87 Psi
43 Psi
KING COBRA™ HOSE
KING COBRA™HOSE LIFE
• Bredel SPX40• Hose NR Bredel• 60 rpm• 7.5 bar-100Psi• Continuous Duty• Water @ 70°C• Bredel Setting
• Bredel SPX40• Hose NR – “King Cobra”• 60 rpm • 7.5 bar-100Psi• Continuous duty• Water @ 70°C• King Cobra Setting
Bredel Pump w/ Bredel Hose Bredel Pump w/ King Cobra Hose
Improved life due to improved rectified hose and hose re-enforcement technology
HOW TO SELECTKING COBRA™ PUMPS
PUMP SELECTIONINFORMATION REQUIRED
• Fluid Handled• Pumping Temperature• Capacity Required• Vacuum Requirements• Discharge Pressure• Duty Cycle (Start-Stop / Continuous)• Viscosity (fluid behavior)• % Solids• Maximum Particle Size• pH Level or chemical compatibility
UNDERSTANDING KING COBRA™PERFORMANCE CURVES
PUMP SPEEDPump speed is directly associated to vertical axis
Example : 40 rpm for 8m3/h (35 gpm)
MOTOR POWER
Motor power curve for 5 bar
Motor power curve for 7.5 bar
Motor power curve for 10 bar
Motor power curve for 15 bar
Motor power can be read on left vertical axis
Example : for 40 rpm @ 5 bar (73 psi), motor power needed = 4 kw for 40 rpm @ 15 bar (218 psi) then motor power needed = 6.5 kw
Motor power is found with the intersection between vertical speed axis and motor power curve according to pressure
VISCOSITY LIMITS
Max viscosity allowed with vaccum assist
viscosity can be read on right vertical axis
Max viscosity allowed without vaccum assist
Example : maximum viscosity allowed without vacuum assist at 30 rpm = 10,000 cps, max of 13,500 cps with vacuum assist
Maximum viscosity allowed is found with the intersection between vertical speed axis and viscosity curve
SERVICEIntermittent Duty = pump is running less than 2 hours and stopped more than 1 hourContinuous Duty = pump is running more than 2 hours or stopped less than 1 hour
Dark Grey coloured =Intermittent service zone
Light Grey coloured = Continuous service zone
Example : at 50 rpm and below 7.5 bar (109 psi), pump can operate continuouslyabove 7.5 bar a (109 psi), and 50 rpm, service must be intermittent
TEMPERATURE LIMITS
Example : under 5 bar (73 psi), and intermittent service, pump is limited to :90 rpm under 40°C (104ºF) and 28 rpm under 70°C (158ºF) Under 15 bar (218 psi) and 70°C, pump is limited to 16 rpm
< 70°C
< 40°C Temperature limits
KING COBRA™SELECTION EXAMPLE
Operating conditions :Fluid : Viscous Sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 psi)
Service : Continuous
1. PUMP SELECTIONAccording to the flowrate, only 3 pumps are suitable : KC40, KCX40, KC65
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous
2. PUMP SELECTIONAccording to the pressure, those 3 pumps are suitable : KC40, KCX40, KC65
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous
3. PUMP SELECTION
According to the service, only 1 pump is suitable : KC65
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous
4. PUMP SELECTIONAccording to the viscosity, the KC65 is suitable
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous
5. SPEED SELECTIONAccording to the performance curve, pump speed = 35 rpm
35 rpm
7 m3/h(.87 gpm)
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous
6. POWER SELECTIONAccording to the performance curve, motor power = 4.6
kW, you will need a 5.5 kW Motor.
35 rpm
4.6 kW
Fluid : viscous sludge
Fluid Tp° : 20°C (68ºF)
Viscosity : 5000 cps
Flow : 7 m3/h (30.8 gpm)
Pressure : 10 bar (145 PSI)
Service : continuous