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Downloadable CAD Drawings LCC Hard Metal Series (LCC-M) The hydraulic wet end consists of three components: a shell or casing, an impeller that screws onto the shaft and a suction plate/liner to permit easy assembly and disassembly for maintenance and inspections. The LCC-M slurry pump does not require a separate outer housing. It features:
The pumps are suitable for high-discharge head, mildly corrosive slurries and a wide range of particle sizes. Custom materials are available for highly corrosive slurries. View a cutaway of the LCC-M. LCC Rubber-Lined Series (LCC-R) The liners are vulcanized to metal backing plates and captured at the split casing, suction discharge flanges and stuffing box area to maintain hydraulic and hydrostatic integrity. LCC-R slurry pumps feature:
LCC-R slurry pumps are suitable for moderate discharge head, fine particles and highly corrosive slurries. View a cutaway of the LCC-R. LCC Extra-Heavy, Metal Series (LCC-H) Standard Models and Their Designation
The first number is the discharge nozzle DN. The second number is the nominal impeller diameter. For example, the LCC 50-230 is an LCC with a 50-millimeter (two-inch) discharge nozzle DN and a 230 millimeter (nine-inch) nominal impeller diameter. Interchangeability Illustration of the interchangeability of LCC 50-230 (2-9 in.), LCC 80-333 (3-12 in.) and LCC 100-400 (4-16 in.). Illustration of Interchangeability of LCC 150-500 (6-20 in.), LCC 200-610 (8-24 in.), LCC 250-660 (10-26 in.) and LCC 300-710 (12-28 in.). Applications It is used primarily in mineral processing, fine primary mill grinding, chemical slurry service, tailings, secondary grinding, in-plant processes, sand and gravel, and coal preparation. The LCC can also be found in environmental cleanup, dewatering (low head type), pulp and paper (liquor transfer), food processing (sugar and sugar beets), coke and resin pumping and ash handling. Operating Limits
Purchase Fewer Wear Parts Reduce and Simplify Maintenance The radial bearings are a self-aligning, double-row, spherical roller-type design and are adapter mounted. They minimize shaft deflection and axial movement. This arrangement accepts mechanical seals without any change in the bearings. The slip on shaft sleeve has a heavy-fused, carbide coating, which results in extended sleeve and packing life. A machined saddle on the pedestal and a machined fit on the split-cartridge bearing housing provides automatic alignment. An adjusting screw located at the end of the pedestal simplifies impeller clearance adjustment for maximum wear life and pump performance. Maximize Wear Life Bearings A double-row, taper roller bearing carries the drive load and hydraulic axial thrust without need of thrust compensating clearing vanes on the impeller. The impeller-end radial load is carried by a double-row, spherical roller bearing. Bearings are pressed to the shaft, which then slides into the housing from the drive end. Inpro/Seal This product enhancement eliminates the possibility that the bearing assembly will be contaminated by water or solids, ensures that the bearing assembly will be properly lubricated and does away with the maintenance and replacement costs associated with lip-design oil seals. GIW offers two Inpro/Seal designs:
The Inpro/Seal bearing isolator is manufactured in two parts: a rotor and a stator. The rotor revolves with the shaft, driven by a tight­fitting drive ring fixed to the shaft. It also has a stationary component fixed to the bearing housing with a press fit and an O-ring gasket. The two pieces are assembled into a single unit and axially locked together by an O-ring insert. No frictional contact occurs between the rotor and stator while the isolator is running. The seal's key design feature is a specially seated O-ring, the Vapor Blocking Ring, that lifts clear when the shaft is in operation, but positively seals when the shaft is at rest. The new end covers are completely interchangeable with the previous design. To change a bearing assembly to the new Inpro/Seal design, simply order the new end covers and the Inpro/Seal. Since there is no mechanical contact-friction, heat or wear, the Inpro Seal bearing isolator lasts a long time. The manufacturer reports that seven to 15 years of constant service is not long in the life of an Inpro/Seal bearing isolator. Lubrication Motor Mount Arrangements Testing Hydrostatic tests can be carried out on all pumps at no additional charge in accordance with GIW ISO 9001procedure 10.0001.01.00. These are performed at 1-1/2 times the operating pressure or 125 psi, whichever is greater. Materials Overview The wet ends of the LCC slurry pump are interchangeable. The hard metal shell, impeller and suction piece can be interchanged with the ductile iron outer casings, rubber liners and elastomer or metal impeller. The pump shaft, suction and discharge piping are not affected. This feature provides excellent adaptability to meet changing pumping conditions. LCC Series Slurry Pumps feature pedestals and bearing housings of gray cast iron. The metal casings of LCC rubber-lined pumps are cast of ductile iron for increased pressure rating. Gasite WD28G, Standard Gasite WD28G is a proprietary metal. It exceeds the requirements of ASTM specification A532-93a. This high-chromium material offers excellent wear life along with resistance to chemical corrosion when applied in slurries with pH as low as three. Other speciality white irons are available. Polyurethane, Standard For Elastomer-Lined Impeller Polyurethane is formulated to provide high-quality parts cast in molds for maximum dimensional integrity. Polyurethane's success as an abrasion-resistant material for pump parts has been mainly in applications where particles are smaller than 0.04 inch (one millimeter) or 16 mesh. Polyurethane is susceptible to hydrolytic degradation in temperatures of 160° F (70° C) and above. Elastomers LCC Rubber-Lined slurry pumps are available with Gasite WD28G or urethane-lined impellers. Rubber: Pure Gum Rubber, Standard Rubber: Natural Rubber, Optional Its abrasion resistance exceeds that of any other elastomer as long as particles are not large enough to cut the rubber. As a result, natural rubber is the most commonly used material in abrasive pumping services where maximum particle size is below 14 inch (10 millimeters) and where organic compounds that attack rubber are not present. Rubber: Natural Rubber Compounds, Optional A variety of natural rubber compounds are available. Each compound variation to the pure gum is formulated to emphasize a desirable aspect of chemical or temperature resistance while maintaining the maximum abrasion resistance possible. The high resiliency of pure gum natural rubber is modified as reinforcing chemicals, such as carbon, are introduced into the compounds. Neoprene, Optional Neoprene compounds are generally used where the presence of oils, chemicals or temperatures above 150° F (65° C) limit the use of natural rubber. Other synthetics, such as Butyl, Nitrile and Hypalon, are available. These special compounds may be needed to meet specific chemical and temperature conditions. Shaft Seal Design Stuffing Box The LCC slurry pump stuffing box must, in most cases, be supplied with an external water flush to prevent the solids from entering the sealing area where they would cause accelerated wear. For both designs, seal water should be furnished at 10 psi above the discharge pressure. The standard LCC stuffing box features one ring of packing forward of the seal water ring to limit seal water usage. The design of the packing box minimizes the use of flush water. Braided Teflon®-impregnated flax packing rides on a carbide-coated shaft sleeve. Expeller Option In the case of precipitating solids, a liquid flush may be required and can be accomplished by replacing the forward ring of packing with a spacer. This allows easy addition of purge fluid through the stuffing box seal water inlet connection. GIW's standard expeller option requires a longer shaft to allow installation of the expeller between the pedestal hub and pump shell. The expeller wear parts are constructed of abrasion-resistant white iron. The maximum positive suction pressure available to the pump places limitations on the expeller. This is generally limited to approximately 10 percent of the operating discharge pressure. For this reason, expellers may not be suitable for closely spaced, multistage applications. Expellers also require approximately five to 10 percent more power to operate. Mechanical Seal Option The LCC Series Slurry Pump mechanical end is designed to minimize shaft deflection and axial movement for optimal mechanical seal performance. Many different mechanical seal designs exist: from severe-duty, custom-designed types to standard, commonly available types. The correct seal type for any given application depends on the nature of the slurry. Mechanical seals offer pump operation without the need for seal water. This removes the potential for product dilution or leakage. Many mechanical seals operate without an additional cooling medium. These are most preferred in slurry applications. Your Next Step
There are no warranties, express or implied, in this information. See the Limited Warranty found in the owner's manual or write GIW Industries Inc. The company reserves the right to make design changes without obligation to make these changes on units previously sold.
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