Transcript ProMinent Fluid Controls Pittsburgh PA

DulcoFlex Pumps
DulcoFlex
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AGENDA
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Peristaltic Pump Theory
Peristaltic Pump Features & Benefits
Peristaltic Pump Limitations
Roller versus Shoe Technology
Hose life
DulcoFlex product line
DulcoFlex features
Applications
Summary
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Peristaltic Pump Theory
Per·i·stal·sis (per·i·stal·ses) n. pl.
The wavelike contractions of a tubular structure that propel
the contents forward by alternate contraction and relaxation.
DulcoFlex
As the rotor of the pump rotates the fluid is gently
pushed forward until it is expelled through the
discharge. In a peristaltic pump this occurs twice
per revolution.
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Peristaltic Pump Theory
Peristalsis is regarded as one of the simplest
and most efficient means of pumping fluids.
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Peristaltic Pump
Features &
Benefits
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Peristaltic Pump Features & Benefits
Seal-less Design
• With the hose being the ONLY contact point of
the material, there is no need for any sealing
devices whatsoever!
• Other PD pumps require mechanical seals,
packing glands or ball checks.
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• Since the fluid is held hostage inside the hose, no
mechanical components are susceptible to
corrosion and wear.
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Peristaltic Pump Features & Benefits
Accurate dosing.
• Because of such a high volumetric efficiency, the
hose and tubing pumps make excellent dosing
and metering pumps.
• With repeatability they are accurate to +/- 1%
when dosing and metering.
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Peristaltic Pump Features & Benefits
Self Priming
• The peristaltic hose pump is the ONLY PD pump capable of
pulling a “dry” vacuum of 29.5 feet (9 meters) making it the best
suction lift PD pump available.
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Peristaltic Pump Features & Benefits
Reversible.
• Since there are no sealing devices required for a
hose or tubing pump, they can be run in either
direction.
• Reversing a pump can be an effective way to clear
suction line blockages.
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Peristaltic Pump Features & Benefits
Low maintenance costs.
• The only repair parts required for peristaltic
pumps are hoses or tubes. (NOTE: Shoe
pumps also require replacement lubricant.)
• A typical hose/tube replacement takes less than
2 hours and the pump does not need to be
removed for service.
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• Most replacement tubes/hoses cost less than
10% of the purchase price of the pump!
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Peristaltic Pump Features & Benefits
Run Dry
• Some PD pumps cannot run dry or risk
catastrophic failure.
• Hose pumps are totally capable of running dry for
an undetermined amount of time.
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• The peristaltic hose pump can also handle fluids
with air entrained or gases.
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Peristaltic Pump Features & Benefits
Gentle pumping action.
• Since hose pumps turn at slow speeds, the
product is gently pushed through the hose with
minimal turbulence.
• The hose pump is one of the best pump
technologies available for minimizing damage to
shear sensitive materials such as water based
paints and flocculants.
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Peristaltic Pump Features & Benefits
Abrasion resistant.
• Hose life is NOT related to a products abrasive
qualities.
• Due to the slow speeds and gentle pumping action
the hose pump is capable of pumping some of the
more abrasive liquids such as ink, sludge, and
TiO2
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Peristaltic Pump Features & Benefits
No slip.
• Slip as defined is “the action of the positive
displacement pump to allow some of the
pumped liquid to be forced back into the cavity
which is now filling with product.”
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• Hose pumps are very close to being 100%
volumetric efficient as slip is virtually
eliminated by the complete compression of the
hose.
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Peristaltic
Pump
Limitations
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Peristaltic Pump Limitations
 There are a limited amount of elastomeric
materials available for hose manufacturing.
Inevitably there are some chemicals that hose
pumps will not be able to be used for.
 Example: Toluene is not compatible with any
rubber products associated with hose pumps.
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 Sizing. Compared to other PD pump
technologies, hose pumps have a large footprint.
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Peristaltic Pump Limitations
 Maximum flow rates typically are around 230
gpms.
 Temperature is restricted based on hose selection.
The highest temperature condition is 210º F.
 There are pressure limitations based on pump
speed. The faster the pump speed the lower the
output pressure. Maximum pressure for DulcoFlex
hose pumps is approximately 232 psi.
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Peristaltic Pump Limitations
Pulsation
 All peristaltic pumps pulsate. This pulsation can
affect sensitive in-line equipment such as flow
meters and can cause excessive vibration in
pipe lines.
 It is recommended that a pulsation dampening
device be installed near the pump discharge.
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Roller
versus
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Shoe
Technology
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Roller versus Shoe Technology
SLIDING SHOE TECHNOLOGY
• A set of fixed shoes slide over the surface of the hose causing it
to compress the hose twice per revolution.
• Since the compression causes friction heat, the chamber is filled
with a glycerin based food grade lubricant.
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Roller versus Shoe Technology
ROLLER TECHNOLOGY
• Rollers are mounted on permanently greased bearings.
• This allows the rotor to rotate smoothly during compression.
• The hose and outer roller surface are lubricated with silicon
grease which reduces friction creating a lower starting torque,
lower operating torque and less mechanical stress on the hose.
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Roller versus Shoe Technology
• Because of reduced hose stress, roller
pumps can increase hose life by 30%
over shoe compression pump hose life!
• Because of reduced torque, the roller
pumps typically consume less HP.
• Roller technology is limited to 116 psi (8
bar) operating pressures. Shoe
technology is suitable for operating
pressures to 232 psi (16 bar ).
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Roller versus Shoe Technology
 Shoe pumps have a difficult time maintaining
system pressure when operated below 3 rpms.
However, a similarly sized roller pumps can
maintain system requirements at speeds below 1
rpm!
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Hose
Life
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Hose Life
Factors affecting hose life:
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Speed
Temperature
Process chemical
Discharge pressure
Suction conditions
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Hose Life
SPEED KILLS!
 The single biggest impact on a hoses life is speed.
 With a hose life expectation of 10,000,000 restitutions before
performance decline, you can see how the proper selection
of the pumps speed is so critical.
 10,000,000 / 2 / pump rpm / 60 = approximate hose life.
 10,000,000 / 2 / 40 / 60 = 2083 hrs.
 10,000,000 / 2 / 30 / 60 = 2778 hrs.
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By selecting a pump 10 rpms
slower, the hose life expectation
increases by 25%!!!
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Hose Life
Typical hose life curve – DFC pumps
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Hose Life
Temperature
 Higher operating temperatures can cause the hoses to swell.
 This makes it more difficult to compress the hoses.
 DulcoFlex hoses are limited to 175º F on the NR, NBR and
Hypalon.
 The EPDM hose has a temperature limit of 210º F
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Hose Life
Process Fluid
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Peristaltic pumps have a limited availability of hose materials.
Selecting the wrong material can cause premature failure of the
hose/tube.
 For example:
 A fluid containing oils or fats/greases is not compatible with
natural rubber. NBR would be the hose of choice.
 There are numerous chemical compatibility charts available to
help select the correct hose material.
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Hose Life
Suction Conditions
 Extremely high suction lifts can cause premature wearing of a hose.
 At greater lifts, the hose has a hard time restoring itself to it’s
original shape.
 If the hose does not reconstitute itself back to it’s original shape,
there is a reduction in the flow.
 A vacuum device can be installed to help the hose reclaim its
original shape.
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Discharge Pressure
 Extremely high discharge pressures make it very difficult for the
roller or shoe to completely compress the hose.
 Slip can increase causing a decline in performance
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Hose Life
 DulcoFlex reinforced hoses are manufactured to
very specific engineered tolerances.
 The nylon reinforcement is hand wrapped assuring
good quality control.
 The frequency of the wrap is also important.
 Increasing the frequency of the wrap
extends hose life.
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Hose Life
DulcoFlex
Competitors hose.
Less frequency of
reinforcements
DulcoFlex hose.
More frequency of
reinforcements –
longer life!
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Hose Life
DulcoFlex reinforced hose available in:
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Natural Rubber (175º F max)
Nitrile Buna Rubber (FDA approved) (175º F max)
EPDM (175º F max)
Hypalon (175º F max)
DulcoFlex tubing available in:
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 Norprene (30 psi max)
 Tygon (30 psi max)
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DulcoFlex
Product
Line
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DulcoFlex Product Line
DFAa Series
DFDa
Series
DFBa
Series
DulcoFlex
DFCa Series
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DulcoFlex Product Line
DFAa – Tubing Pump Series
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Flow range: .05 gph to 190 gph.
Working pressure 30 psi max.
3 roller design.
Suction lift to 15’.
Tube sizes:
 .8mm, 1.6mm, 2.4mm, 3.2mm, 6.4mm, 8.0mm
Wall thickness: 1.6mm & 2.4mm
Tube materials: Norprene, Tygon.
Easy tube replacement.
Reversible.
Low cost maintenance.
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DulcoFlex Product Line
DFBa Roller Pump Series
Uniquely designed for reinforced hose OR tubing!
 Heavy duty pump.
 Flow range: 0.1 gph – 390 gph (6.5 gpm)
 Suction lift approximately 27’
 Viscosity to 15,000 cps
 Max pressure:
 hose – 115 psi
 tube – 30 psi
 Sizes available:
 10mm, 13mm, 16mm
 19mm, 22mm
NO FILL LUBRICANT REQUIRED
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DulcoFlex Product Line
DFCa Series Roller Hose Pump
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Medium/High flow
Heavy duty applications.
Flow range: 1.3 gpm – 132 gpm.
Max pressure: 115 psi.
Self priming to 27’.
Viscosities to 60,000 cps
Roller technology.
Cartridge type bearing system.
Reversible rotation.
Available sizes:
 30mm, 40mm, 50mm, 60mm, 70mm
NO FILL LUBRICANT REQUIRED!
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DulcoFlex Product Line
DFD Series Shoe Compression Pumps
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Medium/High flow
Heavy duty applications.
Flow range: 1.3 gpm – 225 gpm
Max pressure: 230 psi.
Self priming to 29’.
Viscosities to 60,000 cps
Shoe technology.
Cartridge type bearing system.
Reversible rotation.
Available sizes:
 25mm, 32mm, 40mm, 60mm, 70mm, 80mm, 100mm
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DulcoFlex
Hose Pump
Features
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Hose Connection
 The majority of hose leaks occur closest to the
discharge connection.
 The hose acts like a small “accordion” and
because the hose is under system pressure at
this point – most failures occur there.
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Hose Connection
Several hose pump manufacturers have “external”
hose connections. External hose failures can create
environmental and safety hazards.
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DulcoFlex Features
Introducing the DulcoFlex
Disaster Proof Connections.
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The flange housing is cast right into the pump.
A beveled “C” clamp is attached to the hose.
The insert is installed into the hose.
The flange assembly is then attached which closes the “C” clamp
firmly around the hose.
 Any leaks are now contained within the pump.
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DulcoFlex Features
Heat dissipation
 Shoe compression pumps create a
tremendous amount of heat.
 As we have learned, heat can affect
hose life (shorten).
 DulcoFlex has designed our pumps
to maximize heat dissipation.
 Heat sync tabs have been cast into
the housings of our pumps.
 Keeping the hoses cool helps
extend their life.
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Applications
Municipal applications
Clean water:
 Chemical transfer
 Chemical feed
 Chemical metering
DulcoFlex
Dirty water:
 Sludge transfer
 De-watering feed
 Chemical transfer
 Chemical feed
 Chemical metering
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Applications
Industrial Markets
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Mining
Chemical
Pulp & Paper
Food
Ceramic
Cosmetics
Slaughter houses (blood)
Breweries/Wineries
Fish
Industrial wastewater
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PD Pump Comparison
Feature
Pro Cav
Lobe
Double Disc
Piston
Hose
Flow
2000 gpm
2000 gpm
600 gpm
550 gpm
230 gpm
Pressure
1500 psi
150 psi
40 psi
130 psi
230 psi
Suction lift
Excellent
OK to Poor
OK
OK
Excellent
Shaft seal
Mech/pack
Mech/pack
Ball checks
Ball checks
None
Run dry
Poor
Limited
Good
OK
Excellent
Pump air
entrained fluid
OK
OK
Good
OK
Excellent
Volumetric
Efficiency
Good
Good
OK
OK
Excellent
Ease of repair
Poor
Poor
Good
BAD!
Excellent
Repair cost
Poor
Poor
Good
BAD!
Good
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Summary
DulcoFlex peristaltic pumps:
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Low maintenance
Great suction lift capability
Seal-less design
Reversible
Abrasion resistant
Accurate dosing/metering
Disaster proof hose connections
21 different models available
Flows to 225 gpm
Pressures to 230 psi
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ProMinent USA Thanks you!
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