Sliding Shoe Pumps

Positive Displacement Pumps

The Sliding Shoe pump is unique to all other pumps in the world and offers the advantages of many different pump types in one pump. No other pump has as many unique design features and benefits.

The Megator self priming positive displacement sliding-shoe pump provides exceptional suction performance, versatility, and the ability to pump at constant capacity against heads to 250′ (76m). It can run without harm during dry suction, is self compensating for wear, has a simple design with few working parts and single cover access to its wear parts. It might be said to resemble a reciprocating piston pump, and it has indeed all the well known merits of that type – powerful suction and self priming, constant capacity at varying heads, the ability to cope with rough conditions and to handle a great variety of liquids, viscous or free flowing, clean or dirty. Yet in its simplicity, compactness and smooth flow it more closely resembles the centrifugal pump. It therefore combines the advantageous features of both these two main pump types without their respective limitations.

Sliding Shoe Pump Assembly

Self Priming Industrial Pumps

Modern industrial pumping means much more than transferring a liquid from A to B. Pumps have become the prime movers in innumerable industrial processes and encounter endless combinations of pressure, density, viscosity, temperature, volatility, corrosiveness and solvent action, of solids in suspension and gases in solution. There is no simple and universal answer to these problems, and no one type of pump will cope efficiently with all conditions, but Megator pumps come nearer to doing so than any other single type.

Megator pumps are widely used in a variety of industrial applications which include:

• Mine face drainage pumps
• Aviation deicer pumps
• Engine coolant pumps
• Laundry waste pumps
• Food waste slurries pumps
• Diesel fuel pumps
• Sewage scum pumps
• Caustic liquor pumps
• Syrup transfer pumps
• Chemical sludge pumps
• Lime slurry pumps
• Waste oil pumps
• Paint transfer pumps
• Oil transfer pumps
• Sump drainage pumps
• Leachate pumps

Mining Sliding Shoe Pumps

• Single cover access/Easy to Service
• Self Priming
• Dry Running
• High suction lift
• Constant capacity at varying heads
• Low Shear (to prevent emulsification)

Proven Mine Dewatering Technology

• Runs for long periods with a completely dry suction line, without loss of prime or damage to the working parts.
• Super suction handles high lifts and long suction lines, so pumps can be installed in convenient locations.
• Attaching a number of isolated suction lines reduces the need for multiple pumps.
• Maintenance is quick, simple and can be performed underground without disconnecting pipe work.
• Rapid self priming without the need for troublesome footvalves.
• Self compensating for wear prevents frequent stoppages and downtime.
• Eliminates expense, down time and safety concerns fo installing/maintaining electric submersible.

Dolphin Strainer

• Available from 1.5″ — 6″
• Always Floats Upright
• Tough, Shock-Proof
• Corrosion Proof

Oil Recovery Units

Recovery Unit Includes:

• Portable Pump Units (2 – 60 gpm)
• 1-1/2″ or 2″ Alpha Skimmmer
• Electric or Gasoline Drive
• 10 feet of non-floating hose and 30 feet of floating Hose with 3 sets of quick connect fittings

Alpha Skimmer

• Skims Oil and Other Effluents
• Adjustable Intake Weir (for thin or thick layers)
• Stainless Steel Construction
• Optional Screen Kits
• Optional Folding Design For Manways

Options

• Oil Water Separator
• Air, Diesel or Hydraulic Drive
• 2″, 3″ or 4″ Alpha Skimmer
• Stationary Pump Units (up to 265 gpm)

Useful Pumping Data

Piping

The size of pipe should not be smaller than the pump ports and, for long pipe runs or when handling viscous liquids should generally be larger. For other than very simple pipe runs, the actual pipe losses should be calculated using loss-of-head curves, as they may be a major part of the total head on the pump. Easy bends should be used and sharp elbows and tees avoided, to avoid loss of capacity or difficulty in priming due to air leaks.

Net Positive Suction Head (NPSH)

NPSH available is the absolute pressure of the liquid at the pump entry less its vapour pressure at the pumping temperature. It is an expression of the service conditions and is the maximum absolute pressure available at the pump entry to overcome the suction losses of the pump itself.

NPSH required is the minimum absolute pressure necessary at the pump entry to maintain the required flow without cavitation. The NPSH required for any pump is the standard absolute atmospheric pressure (10.4 m or 34 ft of water) less the listed suction lift of the pump at normal temperature and pressure.

Specific Gravity

The specific gravity of a liquid is the ratio of the weight of unit volume of the liquid to that of distilled water at 4°C. For normal pumping calculations, the specific gravity of clean fresh water can be taken as 1, and that of sea water 1.03.

Viscosity

In the SI system of units, dynamic viscosity is expressed as the Newton second per square meter (N*s/m². In the CGS system of units, dynamic viscosity is expressed as dyne second per square centimetre (dyne*s/cm²) which is called a Poise.

The centipoise (cP), is a hundredth of a Poise and is the most common unit for dynamic viscosity. The dynamic viscosity for water at 20°C (68°F) is approximately 1 cP.

Kinematic viscosity is defined as the ratio of dynamic viscosity to density. The most common unit for kinematic viscosity is the centistoke (cSt), which is a hundredth of a Stoke. A Stoke is defined as 1 cm²/s and is taken from :

kinematic viscosity = dynamic viscosity ÷ density = Poise ÷ g/cm³