Exposing the Coal Seam
Surface coal mining operations begin by removing the overburden to expose the coal seam. This can be done by either blasting or using a dragline excavator to strip the overburden away, depending on the geological conditions.
When Blasting Is Required
Surface drill crews probe ahead of the dragline to confirm if blasting is required. These specialized drills use closed loop hydrostatic drives to propel the units and open loop hydraulic systems to operate the rotary drills. Parker Gold Cup® series of closed loop pumps & motors are ideally suited for these bi-directional function applications.
Implement circuits like the derrick lift and rotary head pulldown are powered using open loop hydraulic systems. Parker P2 series piston pumps are designed to provide very stable and quick response to system demands found in these applications.
When Blasting Is Not Required
If blasting is not required, a dragline excavator is used to strip the overburden and expose the coal seam. This highly automated large cable operated shovel is electrically powered and moves on pontoons. Multiple draw works swing and maneuver the bucket onto the surface, providing large tonnage removal of material with every cycle.
The hoisting cable system on these units utilize pneumatic braking and lubrication functions. Parker Viking Xtreme pneumatic valve series are designed to provide pneumatic directional control in conditions as low as -40F were these units are often required to operate in.
To dampen shock from the loaded bucket, the dragline excavator has a boom cushioning system. Parker’s A series piston accumulators use a V profile seal and back up washer to eliminate seal roll over typically found in high speed applications like shock suppression.
Loading and Hauling
Dozers are used to rip and prepare the exposed coal seam for the hydraulic shovels and frontend loaders to load the haul trucks. The material is moved to the processing mill facility where it is sized and prepared for transport to market.
To maximize uptime, these fleets of mobile equipment count on robust hose assemblies for their hydraulic, fuel and lubrication system plumbing. Parker’s Global Core series of spiral reinforced hose has a flexible half bend radius design for easier routing, and a tough abrasion resistant cover to last longer. Combined with the Parker OnSite Container assembly fabrication center and Parkrimp system, down time due to hose assembly failures can be minimized considerably.
Featured Products
Valves
Parker offers the industry’s largest selection of hydraulic directional control valves, known throughout the industry for their performance and reliability. Improve efficiency, increase safety and reduce downtime.
Controllers
Parker's diverse selection of mobile controller displays includes programmable IQAN master display units for use in machine applications, as graphical user interfaces, and as CAN gateways; HMI display modules for use in many mobile machines; and rugged, general-purpose PHD suitable for use in off-road equipment.
Pumps
Parker's broad range of energy-efficient hydraulic pumps includes displacement models of variable piston, fixed vane and fixed gear pumps. Designed to handle a wide range of applications, Parker pumps are available with electronic and computer controls and, like all Parker products, these pumps are manufactured with the finest materials under strict quality control.
Hydraulic Motors
Parker’s full line of high and low speed motors provide power ranging up to 15,000 inch-pounds of torque with speeds ranging from 1/2 rpm to 13,000 rpm. A complete range of sizes is offered in gear, gerotor, vane and piston style operating configurations. Fixed and variable displacement motors are available. Parker hydraulic motors deliver excellent performance with high efficiency, true wear compensation and longer service life.
Hose Products
Parker offers the widest range of specialty, industrial, hybrid and hydraulic hose in the industry. Our comprehensive line includes low pressure, medium pressure and high pressure pneumatic and hydraulic hoses that are resistant to heat, ozone, weather, chemicals, oil, flames, UV and abrasion. Parker is the largest hose manufacturer in the world and provides an engineered solution to all of your hose product needs.
Diagnostics
Parker's condition monitoring solutions are designed with accuracy and efficiency in mind, our sensors are engineered to work in perfect harmony with our software. SensoNODE™ and Voice of the Machine™ are rooted in the Industrial Internet of Things, giving users an advanced condition monitoring solution that is fundamentally transforming operational efficiency. For MRO troubleshooting, ServiceJunior diagnostic test kits are ideal to digitally measure pressure and capture min and max fluctuations in any hydraulic or pneumatic system.
Filtration
Parker offers low, medium, and high-pressure hydraulic filters capable of a wide range of temperatures for use in extreme operating environments. Also available are a broad range of compact portable purification systems and automatic vacuum dehydrator systems, as well as accessories to compliment these products. Our hydraulic pressure filters are highly suitable for industrial and mobile applications.
Accumulators
Parker's range of hydraulic accumulators deliver precise regulation and are designed to regulate the performance of bespoke hydraulic systems. Our hydraulic accumulator models offer high and low-pressure variants depending on the application requirements and our lightweight diaphragm hydraulic accumulators are ideal for industries where weight and space are important factors. All of these devices are available with a broad selection of configurations and are easy to install. The quality design of our devices guarantees optimal performance and service life.
For years, our customers asked for a fast, easy and exact way to track, manage and locate parts. So, 11 years ago, the Parker Tracking System (PTS) was introduced. Now, we listen to our PTS users to continually add functionality and improve the user experience. With two platforms to manage assets, PTS Mobile App and PTS Web App, you are a click away from retrieving product information, scheduling a service event, and more.