Tobee THH3/2D slurry pump is 100% interchangeable with 3/2D-HH high head slurry pump, the HH slurry pump is made from wear ressitance material (high-chrome), which the wear-life is same as the original HH slurry pumps. 3x2D-HH high pressure along with sturdier wear parts makes these pumps of the most rugged. Extensive exterior ribbing allows for higher heads to be reached with a single pump, and bulked up wet end parts handle the toughest applications in the field today. Design Features 1. Ductile iron fully lined casing provides durability, strength and long service life. 2. Multi-stage high pressure operation to 750 psi. 3. Heavy duty construction with through-bolt design provides ease of maintenance and minimal downtime. 4. Large diameter, slow turning, high efficiency impellers designed to achieve maximum wear life and low operating costs. 5. Large, open internal passages designed to maximize wear life and lower operating costs. 6. Thick elastomer and alloy liners provide superior corrosion resistance and maximum wear life. 7. Full flush gland, low flow, and dry running centrifugal seals reduce flush water usage minimizing pump operating costs. Tobee�® THH3/2D slurry pumps are designed for handling highly abrasive, high density slurries in metallurgy industry, mining industry, coal, power, chemical, building material and other industrial departments. The pumps of these models also can be installed as multi-stage series.