King Cobra Selection V2

8/2/2019 King Cobra Selection V2

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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 theelastomeric hose.

• Shoes are assembled on a rotating wheel.

• The rotating action of the wheel compresses the elastomeric hose and pushesthe fluid being pumped downsteam.

• Frictions between shoes and hose are reduced by using a lubricant which alsoacts 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) ofhose 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 offluid, as well as, premature wear of the hose.

• Too much hose compression = Unnecessary brakepower, and Lower Hose Life

• 1mm extra shimming may increase hose compression by2 (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

4210

3521

1321

2850

1562

952

1680

1195

710

215 Psi

175 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 SELECT

KING COBRA™ PUMPS



PUMP SELECTION

INFORMATION 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 SPEED

Pump 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 canbe read on leftvertical 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 intersectionbetween vertical speed axis and motor powercurve according to pressure



VISCOSITY LIMITS

Max viscosity allowed with vaccum assist

viscosity can beread on rightvertical 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 speedaxis and viscosity curve



SERVICE

Intermittent 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 continuously above 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 SELECTION

According to the flowrate, only 3 pumps are suitable : KC40, KCX40, KC65

Fluid : viscous sludge



Flow : 7 m3/h (30.8 gpm)

Pressure : 10 bar (145 PSI)

Service : continuous



2. PUMP SELECTION

According to the pressure, those 3 pumps are suitable : KC40, KCX40, KC65




Flow : 7 m3/h (30.8 gpm)





3. PUMP SELECTION

According to the service, only 1 pump is suitable : KC65




Flow : 7 m3/h (30.8 gpm)





4. PUMP SELECTION

According to the viscosity, the KC65 is suitable




Flow : 7 m3/h (30.8 gpm)





5. SPEED SELECTION

According to the performance curve, pump speed = 35 rpm

35 rpm

7 m3/h(.87 gpm)




Flow : 7 m3/h (30.8 gpm)





6. POWER SELECTION

According to the performance curve, motor power = 4.6kW, you will need a 5.5 kW Motor.

35 rpm

4.6 kW




Flow : 7 m3/h (30.8 gpm)


S

King Cobra Selection V2

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