Mining of sand, gravel and silica is important to our daily life, supplying the base
products for glass, foundry molding sand, cement, paint and a variety of construction
materials.
Certain geological conditions place restraints on the methods by which materials can be mined. When the water table is high, hydraulic dredging may be the only practical method to extract and transport materials.
Mining and processing operations have improved their efficiency by employing powerful cutter dredges.
The sand, clay, and stones are pumped several thousand feet through floating pipeline
to a screening station where the sand product is separated from the oversize material
and clay. The sand is transported through a slurry line with a series of booster pumps
four miles to the processing plant where the sizing and purification takes place.
Dredging
Keeping our waterways open to commerce and recovery of resources such as beaches after storms or just natural erosion is the prime use of dredging devices.
In a cutter-suction dredger or CSD, the suction tube has a cutter head at the suction inlet, to loosen the earth and transport it to the suction mouth. The cutter can also be used for hard surface materials like gravel or rock. The dredged soil is usually sucked up by a wear resistant centrifugal pump and discharged through a pipe line or to a barge. In recent years dredgers with more powerful cutters have been built in order to excavate harder and harder rock without blasting.
http://en.wikipedia.org/wiki/Dredging
http://www.dredgingengineering.com/Dredging...
http://www.norfolkdredging.com/Equipment.htm
http://www.u-s-silica.com/Applications.htm
http://www.rinkermaterials.com/
Townley has been involved in the Sand & gravel, silica and dredging business for many years. Providing tough long wearing products required in the demanding service.
NOTE: Click each product thumbnail to view a PDF spec sheet for that product.
UBD
Matrix Pump - Designed to solve wear problems associated with
conventional impeller/volute designs, these pumps have a patented recessed
volute with matching impeller. Coupled with a contoured suction port,
these patented features reduce recirculation and provide hydraulically
clean solution-flow through the impeller to the discharge. Available in
alloy or urethane lined to match your application.
Pump
Parts - Townley has an extensive inventory of parts and patterns
for most common slurry pumps in service. We can provide improved wear
with proper material selection. Cast alloys, replaceable urethane liners
or permanent urethane lined shells, impellers and suction plates.
Series
1000 Suction & Discharge Hose - Reduce vibration and provide
easy transition for older plants with fit problems. Available in straight,
reducer with outlets or taps. Eliminate OEM multiple pipe assemblies with
one P/N. Most any lengths, wear tubes material and I.D.
Super
Flex Hose - This versatile hose can be found in suction and
discharge use where severe flexure is required. In the process plant,
this universal hose is used as a replacement for high wear rigid pipe
and areas where 3D movement is expected
Dredging
Flex - Versatile dredging hose designed and built to handle
the rigors of full-vacuum ladder suction or the extreme flexibility demands
of stern-swivel service.
Floating
Hose, Rubber Elbows and Fittings - Self floating hose as well
as spools, Y’s and El’s. Custom built to your specifications.
MSP
Submersible Slurry Pump - Cost effective replacement for vertical
cantilever style sump pumps. Available in 2”- 10” with 5-150
HP. Standard high-chrome wetted parts. Easily moved with lifting bail
and Townley flex discharge hose. Perfect for sand/slurry pumping, sumps
and waste water run-off. Optional multiple sensor protection box to ensure
pump life.
80TP
Knife Gate Valve - Townley’s most versatile bidirectional
valve features a unique bonded-in Towniprene urethane lined body and seat.
Coupled with a precision stainless steel gate & stem, this valve is
perfect for slurry diversion and isolation with assurance of easy actuation
when you need it. The unique flush bottom of the seal ensures no clogging
or trapping of debris to prevent positive sealing. Townley offers a complete
rebuild service back to factory specifications.. Available in 2”
to 96” I.D.
Urethane
Gaskets and Wedges - Maintenance friendly describes these simple
products found in many power plants. Especially useful for older plants
to offset misaligned fittings or couplings. Wedges can be used for slight
turns in pipe without the expense of fabricated pipe. Designed with a
handle to ensure precise alignment between flanges, this feature doubles
as a “finger saver”. Townley can easily design custom sizes
and formulations for your application.
Miscellaneous
Lining - New or stripped and rebuilt, we can handle pulley lagging,
wheels, tubs, classifier shoes, logger teeth, agitators, propellers, chutes,
etc. we are prepared to line a broad variety of components with either
rubber or urethane based on your applications.
If you don’t see it here, just call our customer service at a facility near you and ask!
