Agenda • Basic Principles of Peristaltic Pumping • General Introduction to Hydraulics • Introduction to Hose pumps • Principle of Operation • Features and Benefits • Disadvantages of Hose Pumps • SPX Hose Pump • Hose Pump Sizing • Accessories • Maintenance
History of Hose Pump • “1870” pump
The 1st Generation • Close coupled design relying on the gearbox bearing • Roller design • Original green • Launched in 1972
History of Hose Pump No Bearing Frame • Old design Occlusion difficult to set Rollers
The 2nd Generation • Long coupled design • The rotor supported on its own bearings • First pressing shoe design • Launched in 1980 • Today’s successful • design
Hose Pump Construction Discharge/Outlet Port Reinforced Hose Pressing Shoe Steel Pump cover Suction/Inlet Port Cast Iron Pump Housing and Rotor
Hose Pump Components Cover Rotor Body
History of Hose Pump • Today’s pump
Features and Benefits • Can run dry • Most suitable for handling shear sensitive products • Accurate (+/- 1%) dosing (metering) capabilities • Smooth liquid passage without valves, dead corners or glands • The material to be pumped does not contact mechanical parts or seals • No shaft seals • Discharge pressures up to 15 bar/220 PSI • Easy maintenance, low cost and short down-time • Only one wearing part: the hose • Easily and completely cleanable
Features and Benefits • Easily adjustable and reversible rotation • High suction capabilities up to 5kpa/28-30 in. Hg • Suitable for high viscosity's and densities • No metal to metal contact, no valves • Lubrication bath for the hose • Heavy-duty construction • Safe for use in explosive environments • No internal back flow, holding pressure • Low noise level in comparison with air driven diaphragm pump • Designed to pump liquids containing particles (abrasion is no restriction)
Mother Nature’s Original Peristaltic Pump Principle of Peristalsis: Wavelike muscular contraction which pushes contained matter along tubular organs.
Mechanical Peristalsis: Tubular Organ Tube: Tubing Pump Hose: Hose Pump Muscular Contraction Compressing Roller: Tubing Pump Compressing Shoe: Hose Pump
What’s Nice about Peristalsis? Controlled Flow • Positive Displacement • It’s a Metering Pump! Hose Does it All • Handles Liquids • Handles Solids • Handles Gasses Contained Flow in Hose • Clean Design - Only the hose touches the Customer’s fluid • Low Maintenance - Time • Low Maintenance - Cost
Track/Housing Tube/Hose Rotor AND. . . Peristalsis = Pump Simplicity!
Principle of Operation • Shoes compress hose • Rotor not in product • (No abrasive wear) • Hose closes 100% • Positive displacement
WHAT ARE THE BENEFITS? Only ONE Wearing Part - the hose Only ONE Wetted Part - the hose Can Run Dry Indefinitely Reversible - flow in direction of rotation And the Benefits of Positive Displacement Accurate Metering +/- 1% from Setpoint Self Priming/Dry Priming Flow proportional to speed
Ideal for Chemically Aggressive Fluids Ideal for Viscous and Abrasive Fluids Ideal for Shear Sensitive Fluids Handles products with gas bubbles EX: Sodium Hypochlorite Hydrogen peroxide Diaphragm Pumps Always Susceptible To This • Application Benefits
Sodium Bisulfite Sodium Hypochlorite Salt Brine Gypsum Diatomaceous Earth Ferric Chloride • Metering And Transferring • Alum • Caustic Soda • Glue • TiO2 • Polymers • Sampling
WATER-WASTEWATER APPLICATIONS Sludge Feed To Belt Filter Presses, Plate & Frame Filters, & Centrifuges Sampling Scum Thickened Sludge Digested Sludge Waste & Return Activated Sludge (WAS & RAS) Alum Sludge Dissolved Air Flotation (DAF)
Occlusion = Squeezing of the Tube Positive Displacement Flow in direction of Rotation Flow proportional to RPM Self Check /Anti Siphon Valve Restitution= Opening of Tube Creates Suction/Draws Vacuum Up to 30’ Lift Water Column • Occlusion & Restitution
A Hose Pump. . . acts like a “Rotary Pinch Valve”
Pulsation • Related to Shoe/Roller Displacement • Pump Size, Speed, & Piping Dependent • Can be Considerable with Hose Pumps
HYDRAULICS - HEAD LOSSES • ABSOLUTE PRESSURE • HYDROSTATIC HEAD • FRICTIONAL LOSSES • IMPULSE LOSSES - • The one people forget
ABSOLUTE PRESSURE • Atmospheric 14.7 PSI • (or absolute vessel pressure) • HYDROSTATIC HEAD LOSSES • Pressure associated with moving a fluid with or against gravity • Ps = S.G. x gravity x height • FRICTIONAL HEAD LOSSES • Different equations for type of flow • Based on flow, viscosity, pipe length, pipe ID, pipe type, pipe layout
Flooded Suction - Positive Head To Pump • Gravity Discharge- Lowers Discharge Head
Suction Lift - Negative Head To Pump • Elevated Discharge- Increases Discharge Head
Minimize Suction Lift • Flooded Suction Preferred • Pumps Can Lift 30’ Water Column • Pump Efficiency - Give Tube Time to Restitute • Consider Pump/tube Size • Consider Pump Speed • Consider Piping Arrangement • Suction Lift = Slow Running Pump
Viscosity • Newtonian • Temperature related • Non Newtonian • Velocity related • Shear thinning (Yogurt, Mayonnaise) • Shear thickening (Kaolin Clay, Corn flour) The property of a fluid which makes it resist flow
Minimize Frictional Losses • Minimize Frictional Losses • Short Piping Runs • Oversize Piping (Where Possible) • Minimize Restrictions & Elbows
IMPULSE LOSSES - What Increases Pulsation? Pi = c1* (La * F * n * s.g.) D2 Pi = impulse losses c1 = constant La = actual pipeline length F = pump capacity n = pump speed s.g. = specific gravity D = diameter of the pipeline
Minimize Impulse Losses • Short Piping Runs • Oversize Piping (Where Possible) • Minimize Restrictions & Elbows • Run Pump at a Slow Speed • Use Flexible Lines • If Needed, Use Pulsation Dampers
Unique fail-safe design • SPX pumps are designed to fail predictably in case of a massive overload or a stalled rotor. Uniquely, this design enables simple component exchange and eliminates expensive component damage and unpredictable downtime.
SPX - Buffer-zone • Buffer-zone offers a first line defense for the drive.
SPX - Easy Hose Change • Simpler hose clamping combined with a powered hose-changing system cuts hose replacement time by up to 30%, and no special tools are required for any work. • The hose sealing arrangement is continuously in sight. This gives the customer total reassurance that a perfect seal is obtained during hose changing.
SPX - Easy Hose Change • Improved hose sealing method • Faster hose changing • Reduced number of hose clamps
FLANGE BRACKET CLAMP HOSE INSERT HOSE CONNECTION SPX RANGE H:\CAD\SPX\SALES\SPX_40_007
SPX - Shoe/Shim • Shim Design • Flat • Window Design • Functions as sight tube • Rapid access to shims • Shoe access • Shoe Design • Epoxy
Insert the shims as shown. Tighten the bolt, replace the cover and adjust the lubricant level. You’re Done!!
SPX - Cover • Handles • Locator Slots in Casting • No sight tube - Window functions as level indicator
Cover w/Handles • Convenient place to hold smaller covers. (don’t try this with an SPX100) • Place to help pry cover off of pump. • Has locator notches so the cover always goes on correctly
SPX - Frame • Torsion free frame design • Improved corrosion resistance
SPX Features & Benefits • 20% lighter • 35% smaller foot print • 20% less components • No protrusions • Reduced number of fasteners • Easier hose change • New flat shim design • Epoxy shoes, improved design • Fit through window • Drain at the lowest point
SPX Features & Benefits • Planetary “direct coupled” drive • No alignment • No coupling • No coupling-guard • No base plate • Buffer zone offering early warning of lubricant seal damage