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Product code: JST-KZN

JST-KZ / KZN Sand, Sludge & Slurry Submersible Pumps with Built-in Agitator

Pump Type - Submersible

Max Flow Rate - 384M³H

Max Head - 34M

Pump Materials - Cast Iron

Max Temp - 40°C

Max Viscosity - 50 cst

Max Solid Passage - 35mm

Self Priming - N

Inlet/Outlet Sizes - 75mm to 205mm

Drive - AC Electric

Max Suction Lift - 0



£4143.60 (inc VAT) £3453.00 (ex VAT)

This product has a delivery lead time of 1-2 days


JST-KZ / KZN Sand, Sludge & Slurry Submersible Pumps with Built-in Agitator

Flow Rate

Up to 6400 l/min (384 m³/h)

Head (Pressure)

Up to 34 metres

Sizes Available

3” - 8”

Solids passage

Up to 35mm

Drive Options / Power

Electric Motors /  3.7 – 30 kW

Operating Temperature

Up to 40°C


JS submersible pumps are designed for heavy duty usage low- high flow at low-high pressures applications, JS offers a vast number of pump types from puddle pumps to drainage, grinder and vortex submersible pumps the JS range is a great option for must domestic or industrial applications, these submersible pumps are typically used for sewage dewatering, waste water as well as sand, mud/sludge and slurry dewatering. 


JS submersible pumps are available with a variety of impeller types, depending on the pump model such as grinder, vortex and cutter, there are also a number of different mechanical sealing options and materials available, in addition some models can be supplied with integrated agitators these feature is quite useful when handling large concentrations of solids as it's specifically designed for keeping solids in suspension and as a result maintaining the pump's inlet unclogged consequently avoiding impeller blockage.


Available in single or three phase in both 50 and 60 Hz.

Most pumps can be supplied with or without float - manual or automatic.


The JST-KZN pump range is supplied with built-in agitator in Hi-Chrome, high grade cast iron casing and pump head and dual hard faced mechanical seal in closed oil bath, its highly robust design and construction make the JST-KZN the ideal pump range for the most difficult pumping fluids and applications such as lime slurries transfer, sand and gravel dewatering, mill scale, ash transfer etc.



Design Features/Benefits


        Supplied with built-in agitator in Hi-Chrome

        Double  hard face mechanical seal

        Top outlet

        Supplied with dual hard face mechanical seal in lubricated chamber

        Comes with built-in agitator for blockage prevention

        Extremely robust construction

        High resistance to corrosion due to high grade cast iron pump head.

        Thermal protection feature on all motors

        IP68 protection

        61 metres max submersion depth

        Can handle up to 70% solids in weight

        Comes with axial flow cooling water jacket

        35mm max. Solids passage

        Liquid temperature up to 40°C

        60Hz frequency also available upon request

        410 stainless steel pump shaft


Typical Applications/Fluids:

        Drainage / dewatering

        Concrete mixing plants

        Mining / drilling


        Offshore industry & dredging

        Construction and industry water


No, definitely not! submersible pumps will incur damage even after short periods of dry running. The mechanical seal requires lubrication and cooling while the pump is operating. Without the presence of fluid, the mechanical seal will overheat and crack, and this may cause the pump to leak and fluid to enter the motor. There is also the possibility that the motor will burn out as this requires cooling by the fluid during operation. Our advice is to ensure that the pump and motor are always submerged during operation. There are two main ways to ensure the pump only operates in the event of submersion. Firstly, only the operator turns the pump on and off manually when they have a clear view of the sump. Secondly, fit the pump with a float switch that will automatically turn the pump off once the fluid has dropped to a specific level in the chamber. If you think that dry running is inevitable, then please speak to us and we will try to select a more suitable pump for your application.
Manual and automatic are the two main ways to describe how a submersible pump will operate. Manual means that the operator manually turns the pump on and off when required, turning the pump off and avoiding any possible damage from dry running is solely the liability of the operator. Automatic means that the pump will turn on and off automatically via a float switch or float switches. A float switch is connected to the motor that detects the fluid level in the sump, the pump is turned on when the level is high enough, and the pump is turned off when the fluid drops to an acceptable level.
A clear picture of the pump system is required to make an accurate selection. The main pieces of information required include; a description of the application, bore of pipework, the fluid, flow rate and pressure/head. With these pieces of information, a pump can be sized correctly to ensure it delivers the required flow rate and pressure and that is also operates at its best efficiency point to lower lifetime costs. Knowing if the pump is running intermittently or continuously also allows the correct motor speed to be selected. For instance, a pump running continuously 24/7 will require a 4 pole motor rather than a 2 pole motor. Running the motor slower and oversizing the pump will reduce wear of the motor and the pump, therefore lowering maintenance costs during their lifetime.
Yes, absolutely! In fact, submersible pump motors need to be submerged in fluid during operation for cooling and to avoid overheating. These motors have an IP rating of 68. IP stands for Ingress Protection, this is a measurement of a component's resistance to dust and fluid entering.
Please be aware that the figures displayed relate to the largest pump from this range of products, not specific models. For details on solids passage for specific models, please refer to datasheets or contact a member of our sales team.


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