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Slurry Pump Guide for Engineers

Wilfley Model K Pumps

A Slurry Pump for the Most Abrasive Slurries • Single stage• Side suction• Horizontal• To 12" discharge

Sealess Design

The Wilfley Expeller• No water gland, pump or piping• No mechanical seals• No air pressure• No stuffing box

A Wilfley Can Run Dry because there is no Rubbing Contact while Running • No dilution• No contamination• No leaking while running Wilfleys are sealed by hydraulic pressure while running. This centrifugal seal is created by the expeller which was developed more than 80 years ago. Wear is minimized on the Wilfley expeller because it operates against suction pressure only.

Leakless at Shutdown

The Wilfley Check Valve• Long wear life• Low cost• Reliable• Easily cleaned When the K is shut down, the check valve seals against the short cylinder head.

Maintenance

The Wilfley Design Advantage• Quick change wear parts• Dual Side intake Maintenance is a major consideration in the development of all Wilfley Pumps. All moving parts in the K can be changed without disturbing the suction or discharge piping.

Service-Support

Wilfley Integrity• Large replacement inventory• Engineering assistance for the life of the pump• Quality craftsmanship A.R. Wilfley & Sons has always produced the finest sealess centrifugal pumps. Wilfley is committed to quality, durability and customer satisfaction. Wilfley still sells parts for and services pumps that have been in continuous service for more than 80 years. It is a tradition at Wilfley. The Wilfley K continues the legacy that is A.R.Wilfley & Sons.

Discharge Expeller creates pressure keeping fluid from shaft.Impeller pumps fluid from intake to discharge Suction Inlet

General Installation Recommendations

This list will help establish specific pumping conditions. • Solution• Temperature• Static Head• Discharge Pipe Size• Length, Discharge Pipe• Discharge Pipe Fittings• Equivalent Length Discharge Pipe• Total Head• Maximum Suction Pressure• Minimum Suction Pressure• Capacity—GPM• Specific Gravity• % Solids by Weight• Maximum Size of Solid Particles• Mesh Analysis• Electrical Characteristics• Viscosity

Choosing Pump Location

The following recommendations may be helpful when choosing the best location for your pump.a. Locate the pump as close to the liquid source as practical so that the suction pipe is short and direct with a minimum of elbows, fittings and valves b. Place the pump in a location so that the unit is accessible for inspection during operation as well as for maintenance operations involving removal and disassembly.

Foundation

The foundation should be sufficiently substantial to absorb any vibration and to form a permanent, rigid support. A concrete foundation on a solid base is satisfactory. Foundation bolts of the proper size should be embedded in the concrete located by the outline drawing.

Alignment

The pump and motor are aligned at the factory before shipment.Realignment may be necessary after the complete unit has been leveled on the foundation and after the foundation bolts have been tightened. Explicit directions for checking and aligning the pump components may be found in the Hydraulic Institute Standards.

Features and Components

This closed type impeller with extra thick shrouds and vanes is available in standard port design or wide port design for viscous, frothy, or large particle slurries. The unique design helps to maintain excellent performance characteristics throughout its wear life.Crane assembly (not illustrated)allows the case to be opened or removed quickly without using separate lifting equipment.(available in sizes 3" through 8")The extra heavy wall thickness and special volute design extends wear life.The impeller bolt functions both as a shear pin and to hold the impeller against the taper of the shaft.The integrated bell-shaped expeller provides a positive hydraulic leakage sealing arrangement eliminating maintenance associated with packing,water glands, or mechanical seals.The heavy section follower plate can be rotated to prolong wear life.The frame protecting ring is made of abrasion resistant material to protect the inlet chamber from excessive wear.The rear inlet design allows for removal of the case without disturbing piping,reduces surging, controls pre-whirl, and can be vented for froth applications.The case bolts are extra large so that fewer are required.Each nut is conveniently located for quick disassembly.

The discharge keeper assembly supports the discharge piping during maintenance so that the case can be opened or removed without disconnecting piping.The centrifugally operated check valve provides a seal at shut-down and opens the seal at start-up to insure that there is no rubbing contact while the pump is running.

The draw bolt is provided to adjust for wear to maintain peak pump performance.The shaft is made of extra strength, high quality steel.Bearing shoulder diameters are ground for precision bearing fits.Convenient, sturdy oil filler elbow allows for simple positive check on oil level.The long cylinder has a large oil reservoir for superior bearing lubrication. Bearing bores are machined to precise concentricity for proper bearing alignment.The frame base is made of cast iron with heavy rib reinforcement to withstand stresses.

Rubber Lined Intake Chamber optional