Sand and Gravel Pump
Features
1. The MG series sand and gravel pump is a single-suction slurry pump that allows the slurry to be sucked in from only one suction side. Available with one impeller, the single-stage horizontal cantilever pump is widely used in dredging, mining and mineral processing industries.
2. A typical feature of this sand and gravel pump is its one-piece case. Other desirable features include the generous passage and abrasion-resistant wet-end parts made from high chrome.
3. Shaft seal options: packing gland seal, expeller seal, and mechanical seal.
4. The discharge outlet has 8 positions at 45 degree intervals that can be selected to meet the installation and application requirements.
Advantages
1. Optimized slurry pump system layout simplifies maintenance operation, ensures long service life, and suit the pump for heavy duty tasks of pumping slurries with large solids.
2. One-piece case and wear-resistant hydraulic parts are easy to replace and repair.
3. Wide flow passage allows a large volume of slurry to pass. The sand and gravel pump is specially designed to handle high-abrasion applications that ordinary pumps can’t even attempt.
4. The pump head is fixed to the mounting base by a few bolts. Users can adjust the clearance between the impeller and suction liner from underneath a bearing pedestal.
5. Shaft seal options: packing gland seal, centrifugal seal, and mechanical seal. Users can easily replace one type of seal with another in order suit the specific pumping application.
Hydraulic Modeling
Wet-end components are cast of hard metal or polyurethane. They are able to maintain good hydraulic performance even when the dredging pump is subject to severe wear. This helps the sand and gravel pump achieve optimal levels of pumping efficiency for an extended period. 3-vane impeller improves the pump’s ability to pass the slurry.
Shaft Seals
Packing Seal
As one of the most commonly used seals for rotating shafts, the gland seal can come with low-flush or full flush arrangement which uses flushing water to prevent media from escaping the pump housing. This kind of seal is suitable for use in almost all pumping applications. In situations where corrosive solids or high temperature might be encountered, Teflon or aramid fiber is used as packing material for the gland. To further increase the shaft’s resistance to abrasion, a ceramic coated shaft sleeve would be used.
Centrifugal Seal-Expeller
The combination of impeller and expeller creates the pressure needed to seal against leakage. Together with the gland seal or lip seal which is used as the shut-down seal, this type of seal can handle sealing requirements for applications where full-flush gland seal is impractical due to lack of water on the site, or sealing water is allowed to enter inside the pumping chamber to dilute the slurry.
Mechanical Seal
Advances in sealing technology allows us to create a mechanical seal that ensures zero leakage. Cartridge type mechanical seal facilitates installation and replacement. Other types of mechanical seal are among options to suit the sand and gravel pump for various pumping applications. We also utilize special ceramic and alloys of high strength and hardness on parts that are subjected to friction. Unique design of and seamless fit between the mechanical seal and seal chamber provides excellent resistance to abrasion and shock that ensures its effectiveness under the toughest conditions.
Transmissions
Grease Lubricated Bearing Assembly
The grease-lubricated bearing assembly houses a large-diameter shaft in its unique bearing cartridge designed specially for heavy-duty tasks. Due to its compact design, the bearing takes up little space while providing minimum vibration and deviation. Grease lubrication minimizes the possibility of oil leakage and little extra maintenance effort is needed. The rotor is easily adjustable. Users can install several rotors operating in series.
Horizontal Axially-Split Bearing Assembly
Lubricated by oil, the axially-split bearing assembly features a large-diameter shaft and a short cantilever. It delivers high rigidity, and is unlikely to deform or vibrate even when highly abrasive solids are encountered. The bearing is directly mounted inside the bearing pedestal which can be split into 2 halves along its center line. This mounting method allows for ease of disassembly, inspection and adjustment of bearing. Water cooling system effectively cools down the hot bearing, greatly improving its use life.
Cartridge Type Oil-Lubricated Bearing Assembly
Spacious cartridge design allows for the installation of a large-diameter rotating shaft. Built specially to handle heavy-duty tasks, the metric size bearing is lubricated by thin oil. Users can install several bearings operating in series. Compact design and high reliability are 2 major benefits of this bearing for its end users.
Installation Types
DC Type: The output shaft of a motor is directly connected to the input shaft of a pump via a pump coupler. This type of connection is suitable for applications where the speed of the sand and gravel pump is the same as that of the motor.
CV Type: The pump is driven by a belt connected to the crankshaft of the engine. This way of connection allows for saving space, easy installation, and fast adjustment of pumping speed. The motor is fixed to the motor support frame which is located on the bearing pedestal above the pump.
ZV Type: Another type of belt drive that allows easy adjustment of pumping speed. The motor is directly fixed to the bearing pedestal. This way of installation is suitable for motors with larger horsepower than is possible with CV type of installation. Due to the installation of motor onto the bearing pedestal, this method helps save installation space.
CR Type: This type of belt drive makes it easier to adjust pumping speed. The installation allows both the motor and slurry pump to be fixed to the ground. The motor is installed to the side of the sand and gravel pump. This installation method is suitable for large-power motors.
Applications
Dredging, mining, coal washing, metallurgy, pulp and paper manufacture, feeding slurries to the hydrocyclone in mining industry.
Parameters
Technical Parameters
Size: 4"-14"(100 - 350mm)
Flow rate: 36-3000m3/h
Total head: 5-70m
Components
| Parts | Material | Material Code | Description | Hardness | Performance | Applications |
| Wet-end Parts, Expeller, Expeller Ring, Stuffing Box | Metal | M05 | 27% High-Chrome Cast Iron | HRC≥58 | Erosion resistance is marginally lower than M07 and has corrosion resistance. | Used for high wear applications with a slurry pH between 5 and 12. |
| M07 | 15% High-Chrome Cast Iron | HRC≥59 | Excellent erosion resistance and has higher wear resistance than M05 | Mining pumps ideal for high impact and high pressure applications, such as pumping slurries with sharp, hard, and coarse solids at high flow rate. | ||
| M12 | 30% High-Chrome Cast Iron | HRC≥65 | With abrasion resistance better than M05 and M07. | Suitable for highly abrasive pumping applications. | ||
| M33 | 35% Ultra High Chrome Cast Iron | HRC=35 | This material has erosive and corrosive resistance in low pH applications. Its abrasion resistance is higher than that of M49. | The material can be used to transport oxygenated slurries with pH of not less than 1 such as phosphor-plaster, nitric acid, vitriol, phosphate etc | ||
| M49 | 29% High Chrome Cast Iron | HRC=43 | With a certain degree of scour resistance and good corrosion resistance under low pH conditions. Its abrasion resistance is higher than M05. | Particularly suitable for use in flue gas desulphurization as well as mild acid applications with pH value no less than 4. | ||
| Frame Plate, Cover Plate, Bearing Housing, Slurry Pump Base | Metal | Ductile Cast Iron | ||||
| Shaft | Metal | 1045 | ||||
| Shaft Sleeve, Shaft Spacer, Lantern Ring, Neck Ring, Lantern Restrictor | Metal | Stainless Steel |
