The SPR type submersible slurry pump is a derivative model of the rubber-lined version of the SP series submersible slurry pumps. This pump has a vertical, long shaft, single-stage, single-suction centrifugal structure. The pump body is connected to the bearing seat on the liquid surface through a support pipe. The impeller and the volute are submerged in the storage tank or slurry of the absorption tower. The motor is installed on the motor seat above the liquid surface and is connected to the pump rotor through a telescopic shaft. The shaft seal adopts a shaftless design (a natural advantage of submersible pumps, as the pump body is submerged and there is no leakage path). The bearings are lubricated with grease or oil. The long shaft section is guided by an intermediate guide bearing (rubber or polyurethane sleeve).

Product structure diagram

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Long service life
Long-lasting operation with stable performance
Reliable material selection
Sturdy casing that effectively protects the internal components
Low noise
Quiet operation with no extraneous sounds, significantly increased water output and rapid pressure boost

Products features

Submersible installation, zero leakage without seals: The pump body is fully submerged in the slurry, eliminating the need for mechanical seals or packing seals, fundamentally preventing any leakage. This is particularly suitable for toxic, corrosive, and expensive slurries (such as precious metal leaching solutions, chemical slurry mixtures). This is also the greatest advantage of the submersible pump compared to the horizontal slurry pump.
Rubber lining, corrosion resistance + anti-abrasion: The volute, impeller, and guard plate of SPR are made of natural rubber R55 or nitrile/butyl synthetic rubber. They have much better tolerance to "corrosion > abrasion" media such as phosphoric acid, sulfate salts, gypsum slurry, and tailings fine mud than high-chromium metals. However, note that - rubber is only suitable for fine particles (≤ 1-2 mm), while coarse particles or sharp-cornered hard rocks can scratch the rubber layer.
Long shaft design, flexible submersible depth: Standard submersible depths are 500/1000/1500/2000/2500/3000 mm, and special versions can reach 4000 mm. They are suitable for different depths of storage tanks, absorption towers, and sedimentation tanks. The long shaft section is equipped with an intermediate guide bearing (rubber sleeve or polyurethane) to prevent shaft oscillation and wear.
Vertical structure, minimal footprint: Only one foundation flange is needed to be fixed at the pool opening or edge of the trough, without occupying the ground at the pool edge, suitable for chemical workshops with limited space, and desulfurization tower areas.

Application scenario

The SPR type submersible slurry pump is specifically designed for transporting fine particles, with low wear and corrosive properties. The rubber inner liner (natural rubber R55/NR or synthetic rubber) exhibits excellent corrosion and wear resistance for media such as phosphoric acid, gypsum slurry, and fine tailings mud. However, the high-chromium metal liner is prone to chemical erosion in harsh corrosive environments. The pipe diameter ranges from 40 to 300 mm, the flow rate is 10 to 500 m³/h, the head is 5 to 40 m, and the submersion depth can be customized from 500 to 3000 mm. It is suitable for media with a solid content concentration ratio of up to 50% (for fine particle conditions) and a medium temperature of ≤ 60 ℃ (the upper limit of rubber's temperature tolerance).

Typical scenarios include: the transportation of phosphoric acid slurry in wet-process phosphate plants (phosphoric acid + fluosilicic acid are highly corrosive, rubber liners are more durable than metals); the circulation of gypsum slurry in power plant desulfurization absorption towers (gypsum slurry with a pH of 4-6, fine particles, corrosion + slight wear); the bottom flow of the fine mud concentration tank in the beneficiation plant (tailings fine mud ≤ 1 mm, metal liners are not cost-effective); the transportation of carbon slurry/mine slurry in cyanide leaching tanks for gold extraction (zero leakage requirements for expensive slurries); the acidolysis slurry in the titanium dioxide plant; the phosphorus ammonium slurry in the fertilizer plant; and various corrosive fine slurries in the chemical industry.

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