Schurco Slurry® Z Series pumps are designed to handle very large particles for gravel and dredging operations.
The Schurco® range of dredge and gravel pumps is designed specifically for continuous pumping of extremely aggressive slurries, with a wide particle size distribution. Its capability of handling large particles at consistently high efficiencies results in low cost of ownership. The large volume internal profile of the casing reduces associated velocities, further increasing component life.
The unique segmented clamp ring on larger size units and solid on smaller pumps facilitates casing rotation to any angle, reducing the need for costly high wearing bends. Minimal maintenance is required.
Impeller – front and back shroud expulsion vanes reduce gland pressure and intrusion of high concentrations of solids in the gland area. Efficiency is maintained by minimizing suction side recirculation. Specially designed and shaped impeller vanes allow the handling of extraordinarily large particles. The unique casing design and sealing vanes prevent abrasive solids intrusion at the sealing faces.
Casing – The large, robust casing has been designed to reduce internal velocities, resulting in minimum efficiency loss and improved casing wear life. The casing is made up of three components to reduce maintenance time and costs associated with a one-piece design.
Expeller (Centrifugal Seal) – no external sealing water required where applicable
Stuffing Box – flushed gland sealing with braided packing and a lantern ring
Mechanical Seals
Cartridge-style bearing housing allows for removal from pump and assembly in controlled environment
Oversized shaft diameters and reduced overhang in the wet-end contribute to long life and reliability in the field
The stuffing box is the original shaft seal for any rotating element through a fixed device. This seal has stood the test of time, and is still one of the most common sealing arrangements in slurry pumps. Seal water must be supplied at a pressure in excess of pump discharge pressure.
A mechanical seal consists of two principle components. One component is stationary and the other rotates against it to achieve a seal. There are many types of mechanical seals, ranging from simple single spring designs to considerably more complex cartridge seal types, which are the type most commonly applied on slurry pumps. The design, arrangement and materials of construction are essentially etermined by the pressure, temperature, speed of rotation and product being sealed (the slurry).
The Schurco expeller seal can operate completely leak free during pump operation.
The expeller rides along the shaft and expels material from the expeller ring cavity. Consideration must be given to inlet pressure and pump speed to ensure proper sealing with this type of seal arrangement. The typical installation introduces grease in lieu of seal water to provide a static seal against the inlet pressure when the pump is not operating.
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