ZJL Series Vertical Submerged Pump
A vertical submerged centrifugal pump that sits in the liquid with no external mechanical seal in contact with the medium — 2–600 m³/h, 8–100 m head, to 100°C (HT version 300°C).
The ZJL series is a vertical submerged centrifugal pump that sits directly in the liquid, with the impeller below the surface and the motor above it, so there is no external mechanical seal in the liquid.
It is intended for tank, pit and sump duty where a surface pump would struggle for suction: flow covers 2–600 m³/h with heads from 8 to 100 m and an immersion depth of 0.5 to 3 m (customisable).
The motor is connected by a long shaft that passes through a bearing column, and the standard construction handles liquid up to 100°C, with a high-temperature version available up to 300°C.
The design suits acid tanks, chemical storage, hot water pits and underground sumps, but it is not recommended for abrasive slurries above about 5% solids.
| Parameter | Specification |
| Type | Vertical submerged centrifugal pump |
| Flow | 2–600 m³/h |
| Head | 8–100 m |
| Immersion depth | 0.5–3 m (customisable) |
| Temperature | ≤100°C standard; high-temperature version ≤300°C |
| Seal | No external mechanical seal in the liquid — shaft runs through a bearing column |
| Motor | Above the liquid surface, connected by a long shaft |
| Mounting | Vertical, flanged top plate over the tank or pit opening |
| Solids | Not recommended for abrasive slurries above about 5% solids |
| Media | Acid, alkali, chemical liquids, hot water and wastewater |
| Parameter | Specification |
| Flow rate | 2–600 m³/h |
| Head | 8–100 m |
| Immersion depth | 0.5–3 m (customisable) |
| Seal arrangement | No mechanical seal in the liquid; shaft runs through a bearing column |
| Motor position | Above the liquid surface, connected by a long shaft |
| Mounting | Vertical, with a flanged top plate over the tank or pit opening |
| Temperature | ≤100°C standard; ≤300°C high-temperature version |
| Liquid duty | Acid tanks, chemical storage, hot water pits, underground sumps and cooling tower basins |
| Solids limit | Not recommended above about 5% solids |
| Wetted materials | Selected to suit the liquid handled — confirm corrosion and solids with the enquiry |
The ZJL series is published as a capacity and configuration range. Choose flow and head for the duty, then confirm immersion depth and temperature class against the actual tank depth and liquid temperature.
- Seal arrangement: no external mechanical seal in the liquid — the motor shaft runs down through a bearing column to the immersed impeller, which removes the shaft seal from the process liquid.
- Mounting: vertical installation with a flanged top plate over the tank or pit opening, so the motor stays above the liquid surface.
- Temperature options: standard construction for liquids up to 100°C, and a high-temperature version up to 300°C.
- Immersion depth: 0.5 to 3 m as standard and customisable for deeper tanks.
- Wetted materials: selected to suit the liquid handled — acid, alkali, hot water or wastewater; confirm corrosion and solids with the enquiry.
- Drive: electric motor above the surface; confirm voltage, frequency, mounting and shaft length with the enquiry.
- Sump drainage: drains sumps and pits where liquid collects below floor level and suction for a surface pump is poor.
- Chemical tank transfer: transfers acid, alkali and chemical liquids directly from storage tanks.
- Pickling lines: circulates pickling liquor in metal treatment and surface finishing lines.
- Machine tool coolant: returns coolant from machine tool sumps and chip pits.
- Underground pits: removes liquid from underground collection pits and drainage chambers.
- Hot water pits: handles hot water and process water in pits where the high-temperature version is required.
- Confirm that the immersion depth of 0.5 to 3 m matches the tank or pit, and ask for a customised shaft length for deeper installations.
- Check the liquid temperature: the standard construction suits up to 100°C and the high-temperature version up to 300°C.
- Because there is no seal in the liquid, verify that the wetted materials suit the acid, alkali or hot water being handled.
- Keep abrasive solids below about 5% by weight; higher solids call for a different pump family.
- Match flow and head to the duty point, and confirm the discharge pipework route from the pump column.
- State the mounting opening and top-plate dimensions so the pump fits the existing tank or pit.
Does the ZJL submerged pump have a seal in the liquid?
No. The ZJL series is a vertical submerged pump with no shaft seal in contact with the liquid — the shaft runs through a bearing column — which reduces leakage risk on corrosive or hot liquids.
What immersion depth and duty range does the ZJL cover?
Immersion depth is 0.5 to 3 m (customisable), with flow from 2 to 600 m³/h and heads from 8 to 100 m.
Can it handle high temperatures?
The standard construction handles liquids up to 100°C, and a high-temperature version is available up to 300°C.
Can the ZJL pump handle solids?
It is not recommended for abrasive slurries above about 5% solids; state the solids content with the enquiry so a suitable arrangement can be confirmed.
How is the ZJL pump installed?
Vertically, with the pumping end immersed in the tank or pit and the motor above the liquid surface; a flanged top plate supports the unit over the opening.
Related Products
- LZ Series Vertical Submerged Pump
- Submerged Pump
How to Choose a ZJL Submerged Pump
Quick answer: Start from the tank or pit: flow, head and immersion depth first, then the liquid temperature, corrosivity and solids content. The ZJL covers 2–600 m³/h at 8–100 m with no external seal in the liquid.
When should I use a submerged pump instead of a surface centrifugal pump?
Use a submerged pump when the liquid sits in a tank or pit below floor level and suction for a surface pump is poor, when a corrosive liquid makes eliminating the shaft seal worthwhile, when there is little height above the tank for installation, or when the liquid is hot and submerged bearing cooling is preferred. Avoid it for abrasive slurries above about 5% solids.
Does the ZJL pump have a seal in the liquid?
No. The ZJL series runs the motor shaft down through a bearing column to the immersed impeller, so there is no external mechanical seal in contact with the liquid; that removes the usual seal-leakage point on corrosive or hot liquids.
What temperature and depth can it work at?
The standard construction handles liquids up to 100°C, and a high-temperature version is available up to 300°C. Immersion depth is 0.5 to 3 m as standard and customisable for deeper tanks.
Selection Data to Send Our Engineers
- Flow rate (m³/h)
- Head / discharge pressure (m)
- Tank or pit depth and required immersion
- Liquid name, temperature and corrosivity
- Solids content
- Wetted material requirement
- Motor voltage, frequency and mounting
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.