JS JST-55KB 400v Industrial Heavy Duty Pump – 011-122

Description

The JS JST-55KB (code 011-122) is the entry point to the KB range of three-phase submersible slurry pumps with a built-in agitator. Its 5.5 kW, 400v motor delivers up to 1,540 litres per minute and a maximum head of 22 metres through a 4-inch top outlet, and it passes solids up to 10 mm.

Choose the JST-55KB where volume matters more than lift, such as emptying a shallow sump or settling pond into a nearby ditch or lagoon. If the water has to climb higher, the JST-55KBH uses the same 5.5 kW motor but trades flow for pressure, reaching 34 m through a 3-inch outlet. For more volume on a 6-inch hose, step up to the JST-75KB at 1,950 l/min.

Every KB pump shares the same build. The impeller, suction wear plate and agitator are abrasion-resistant high-chrome iron, the motor casing is cast iron and the shaft is 410 stainless steel, protected by a shaft sleeve where abrasives cause wear. Double mechanical seals (silicon carbide and carbon) run in a separate oil chamber, with an additional lip seal to keep grit away from them. The motor has Class H insulation and thermal overload protection, which trips on high current or high temperature, and JS Pumps uses an enhanced cable entry sealing system. The outlet is at the top, so the pumped liquid passes the motor and helps cool it for continuous duty.

Features

• Built-in high-chrome agitator keeps sand and silt in suspension
• 5.5 kW, 400v three-phase motor
• Up to 1,540 l/min and 22 m head
• 4″ top outlet
• Solids passage up to 10 mm
• Double mechanical seals in a separate oil chamber, plus lip seal
• Thermal overload protection and Class H motor insulation

Applications

• Quarry and gravel pit sump dewatering
• Settling basins and retention ponds
• Construction excavations with sandy groundwater
• Aggregate washing and stocking areas

At 22 m, this is the lowest-head pump in the range, so check the duty point on the curve if you have a long hose run or a high discharge point. These pumps are built for water carrying sand, silt and light slurry with particles up to 10 mm. They are not designed for raw sewage, rag or fibrous material, for which the JST SV sewage vortex pumps are the better choice, or for chemicals and hydrocarbons.

Performance curves

The JST KB range

All models are 400v three-phase. Flow and head are the maximums in JS Pumps’ 50 Hz KB Series data, and height is the manufacturer’s overall pump height. See the JST KB range page to compare every model and for answers to common questions.